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3 Series / 4 Series
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  #1  
Old 08-29-2003, 12:54 PM
bmw325 bmw325 is offline
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Aftermarket lumbar support options-- help me decide

Alright-- I've really had it with my seats (manual sport seats). My back starts hurting after about 40 minutes, and my legs go numb after about 1 hour. No amount of adjusting seems to help. I don't know what kind of stupdity causes BMW to the reserve lumbar support option for premium pkg 330s only. BMW, if you're reading this: LUMBAR SUPPORT SHOULD BE STANDARD OR ATLEAST AN A LA CARTE OPTION ON ALL OF YOUR CARS. Nearly all of your competitors do this.

Anyway, I've been doing lots of research on the options available for adding lumbar support to my seats. Here's what I've come up with:
1. Buy a lumbar roll or pad and stick it on the seat. I've tried this, but actually find them uncomfortable since they shift around, and actually stick out too much. Plus, they're just ugly.
2. Add the BMW power lumbar.
There is a kit to do this for the e36, but a kit for the e46 hasn't been released yet. There is part number for it in the ETK, but it is not a "real" part number-- just a placeholder. Even if it was available, it probably cost around $700.
3. Add some foam to the seat to "build up" the lumbar area. This would probably be cheap to do, but I think its nice to have some sort adjustability-- a certain amount of fixed lumbar may not always be right.
4. Add a manaully adjustable mechanical-type lumbar support w/ a wheel adjustment knob. A few companies make these, but they're kind of heavy-- and require some welding to install. Would probably give the most "positive" support. Would also require cutting the seat backing to make room for the knob. This is what BMW should make standard on all of their seats-- like VW, Volvo, Mercedes and others do. In terms of feel, they're better than pretty much any inflatable system.
5. Add some sort of manaully inflatable lumbar bag w/ a "Sqeeze bulb" pump to the seats. This is the option I'm leaning towards since its cheap, easy to install, and easy to remove. Suprisingly, there aren't many options out there for this type of product. I could've sworn that BMW sold such a device-- but I can't seem to find any record of it. I would install this in between the seat springs and seat foam, and route the squeeze bulb underneath the seat, and mount it discretely (possibly near the manual tilt adjustment lever on the front of the sport seats).
So, here's what I've come up with for option 5:
Product meant for Miata seats:
Pros:
Looks very well made, and durable
Cons:
-Looks a little small, and oddly shaped
-Says that its specifically made for the Miata-- although I doubt that it really matters.
http://www.miatamania.com/Shop/ViewP...79&SortOrder=1

Corbeau Lumbar support
Pros:
bigger in size
Cons:
Maybe too big to properly "target" the lower back
Looks kind of flimsy
Meant for Corbeau seats--although i don't see why they cant' be used on any seat.
No mounting holes to affix it to the seat springs/support (atleast that I can see in any picture)
I'd probably just end up duck taping it to the seat supports.
http://www.ogracing.com/eshop/itemde...27&showbrake=1
Here's a close-up pic by someone who mounted it in his WRX:
http://www.wrxfanatics.com/index.php...T&f=12&t=2880&

Sparco Lumbar support
Pros
-In between the 2 sizes
-Looks fairly durable
Cons
-Pricey
-Meant to be velcroed to the surface of the seat-- not the interior. Although, I doubt it matters. -Again, no holes or flaps for attaching to the seat foam support wires.
http://www.ogracing.com/eshop/home.asp?categ=105

Which one would you choose? Right now, I'm leaning towards the Miata one or the Sparco because they look better made than the Corbeau.

Last edited by bmw325; 08-29-2003 at 01:00 PM.
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  #2  
Old 08-29-2003, 02:33 PM
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doeboy doeboy is offline
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Hmm... I got Power Lumbar but no premium pkg... I added it a la carte...
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  #3  
Old 08-29-2003, 04:41 PM
JoeCinVa JoeCinVa is offline
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Don't be too quick and give up on the BMW solution. I installed the retrofit kit on my E36 and have been toying with the idea of installing it into my E46 even though there isn't a "kit" available yet. I believe I found all the parts (singly) in the ETK. They are:

Desc, Part Number, Qty, Retail $

Valve Unit, 52-10-7-004-689, 2, $64.00
Pump, 52-10-8-099-008, 2, $95.25
Pad, 52-10-8-099-007, 2, $32.50
L Wiring, 52-10-8-226-403, 1, $81.25
R Wiring, 52-10-8-226-404, 1, $81.25
L Switch, 61-31-8-352-291, 1, $41.50
R Switch, 61-31-8-360-877, 1, $41.50


The retail price for just the one side is $314.50. However, I'm unwilling to pay that much for the wiring and will try to build my own wire harness. So... excluding the wiring and if you get a 25% CCA discount for the remainder of the pieces, it's only $174.94 for a side.

As to the wiring, my experience with the E36 install showed me how BMW did it. Basically, they used 2 connectors to tap into the hot and neg wire for the power seat, 1 connector for the new switch and one connector for the pump.

As to the install, you could do the E36 install by just removing the seatback (but I did it removing the whole seat). If I can get a set of wiring diagrams, I'll try this retrofit in the near future and will try to do it with the seat still in the car.
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03 E39- S62B50 w/90K
00 E46/4- M52TUB25 w/156K
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Last edited by JoeCinVa; 08-29-2003 at 04:46 PM.
  #4  
Old 08-29-2003, 10:29 PM
bmw325 bmw325 is offline
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Quote:
Originally Posted by JoeCinVa
Don't be too quick and give up on the BMW solution. I installed the retrofit kit on my E36 and have been toying with the idea of installing it into my E46 even though there isn't a "kit" available yet. I believe I found all the parts (singly) in the ETK. They are:

Desc, Part Number, Qty, Retail $

Valve Unit, 52-10-7-004-689, 2, $64.00
Pump, 52-10-8-099-008, 2, $95.25
Pad, 52-10-8-099-007, 2, $32.50
L Wiring, 52-10-8-226-403, 1, $81.25
R Wiring, 52-10-8-226-404, 1, $81.25
L Switch, 61-31-8-352-291, 1, $41.50
R Switch, 61-31-8-360-877, 1, $41.50


The retail price for just the one side is $314.50. However, I'm unwilling to pay that much for the wiring and will try to build my own wire harness. So... excluding the wiring and if you get a 25% CCA discount for the remainder of the pieces, it's only $174.94 for a side.

As to the wiring, my experience with the E36 install showed me how BMW did it. Basically, they used 2 connectors to tap into the hot and neg wire for the power seat, 1 connector for the new switch and one connector for the pump.

As to the install, you could do the E36 install by just removing the seatback (but I did it removing the whole seat). If I can get a set of wiring diagrams, I'll try this retrofit in the near future and will try to do it with the seat still in the car.
Very cool! Thanks for the info. I've read some accounts of installing the lumbar in e36 M3s. I wonder if I'd have to run new wires since I have manual seats-- I do have heated seats though.
  #5  
Old 09-28-2003, 09:14 AM
JoeCinVa JoeCinVa is offline
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For those that are still interested in adding this feature, here is the wiring diagram, component locations and connector diagrams for the driver's lumbar seat. FWIW, I found that the Bentley's schematics aren't all that inclusive. I ended up finding and stitching multiple screen shots together from bmwtis.com.

I'm still working on identifying the p/n for the connectors. I think I know what they are though.

Anyone want to take it from here?
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03 E39- S62B50 w/90K
00 E46/4- M52TUB25 w/156K
99 E36/8- S52B32 w/69K
95 E36/C- M50TUB25 w/230K

Last edited by JoeCinVa; 09-28-2003 at 09:23 AM.
  #6  
Old 09-28-2003, 01:58 PM
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EdCT EdCT is offline
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Quote:
Originally Posted by robg
Alright-- I've really had it with my seats .
Hi Rob,

Have you looked into actually replacing the entire seat with one of those really nice comfy jobs?

I'm not up on seats these days, but some one must be making a nice seat replacement for E46's.

(btw, 5 series seats seem really comfortable to me, I wish there was more consistency across the line re seats).

Ed
  #7  
Old 11-08-2003, 01:21 PM
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Terry Kennedy Terry Kennedy is offline
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Quote:
Originally Posted by JoeCinVa
Anyone want to take it from here?
I'm giving it serious thought. However, I'm coming up with different part numbers and I'd appreciate your input.

First, I get different part numbers for the valve unit and pump, possibly becase my car is an 09/02 production and this apparently changed at 06/02:

Valve unit: 52 10 7 115 694
Pump: 52 10 7 115 693

Next, I get different part numbers for the L and R harnesses - the ... 403 and ... 404 claim to be for seats without memory, while ... 401 and ... 402 are for seats with memory. All 4 parts come up without a price in the ETK, though (which isn't a guarantee of anything as the US dealer system doesn't use ETK pricing).

Lastly, the switch part numbers you list - 61 31 8 352 291 and 61 31 8 360 877 - show up as only applicable to the 7 and 5 series. Were you able to confirm that these switches are the right ones for the 3 series as well?
  #8  
Old 11-08-2003, 01:37 PM
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racerdave racerdave is offline
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Quote:
Originally Posted by doeboy
Hmm... I got Power Lumbar but no premium pkg... I added it a la carte...
So since it *is* possible to get Power Lumbar (although a special order), what do you think of it?

Does it make a difference?

I've been kicking around the idea of trying to do the special order or not...
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  #9  
Old 11-08-2003, 01:59 PM
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doeboy doeboy is offline
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Location: OC, California
 
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Quote:
Originally Posted by racerdave
So since it *is* possible to get Power Lumbar (although a special order), what do you think of it?

Does it make a difference?

I've been kicking around the idea of trying to do the special order or not...
It's sort of extra insurance incase I ever need it. Generally the seats feel fine, but over long drives having that extra support is nice if I ever need it. It was a little expensive but I have no regrets about ordering it.

If you don't get it, I believe it is possible to retrofit the lumbar into your seats, but I don't know how much that would cost. Also it's easier to just get the car with it than having to rip your seats out and put those in later IMO.
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  #10  
Old 11-08-2003, 04:02 PM
bmw325 bmw325 is offline
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I would definitely recommend special ordering it. The seats are lacking in lumbar support-- and you WILL need it on longer trips. Its a bit expensive-- but it'll be much more of a pain to try and retrofit it later. The biggest mistake I made when ordering my car was that I forgot to ask to special order the lumbar.
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  #11  
Old 11-09-2003, 07:30 AM
JoeCinVa JoeCinVa is offline
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I ordered (but have not installed yet) most of the parts (driver side only) and pics are below.
Quote:
Originally Posted by Terry Kennedy
First, I get different part numbers for the valve unit and pump, possibly becase my car is an 09/02 production and this apparently changed at 06/02: Valve unit: 52 10 7 115 694, Pump: 52 10 7 115 693
Can't tell you about your 9/02 car because my ETK goes only to 2/02 but I can't understand why the p/n would be different (unless superceded) if it's the same seat structure. FYI, I ordered my listed p/n about a month ago, so those p/n are still in the "system".

Quote:
Originally Posted by Terry Kennedy
Next, I get different part numbers for the L and R harnesses - the ... 403 and ... 404 claim to be for seats without memory, while ... 401 and ... 402 are for seats with memory.
Refering to ETK diagram 61-1220. I don't get any differentiation with regard to memory or not. What I do get is that 403 and 404 are for seats with Electric Seats while 401 and 402 are for seats without electric seats. I don't believe memory or not matters because the lumbar position is not memorized. The difference btwn the 2 sets of wires is that electric seats allow you to tap into it's electric module (module A21) for power and ground whereas not having electric seats would require the 401 and 402 harness to be routed somewhere else for power and ground.

Quote:
Originally Posted by Terry Kennedy
Lastly, the switch part numbers you list - 61 31 8 352 291 and 61 31 8 360 877 - show up as only applicable to the 7 and 5 series. Were you able to confirm that these switches are the right ones for the 3 series as well?
Those part numbers show up correctly in ETK diagram 61-1272 (325xiT, 2/2002). Plus, see the pic of the switch below.

Some comments on the pics/retrofit.
1) I'm pretty sure you don't have to take the seats out of the car. See the trim piece I bought below (less that $10). You have to unscrew (one screw) and unsnap it off your seat (can be done in car). You don't have to buy this piece, but I chose to so that I can see where the mounting tabs are, pre-cut the hole (I don't have a garage), plus it's cheap. Cut the hole out for the switch and the switch will snap into place. The only other piece you have to get out is the seatback.

2) The pad has two color coded tubes. Red and Blue.

3) The valve has 2 colored and 1 non-colored air "pips". Red and Blue go to the pad. The non-colored "pip" go to the pump.

4) I'm electing to build the harness myself (cheaper). The harness only has 3 connectors:

a) Pump Connector: 3 pin black female housing with 2 male pins.
1 x Female Socket Housing, 3 Pol, 61-13-8-377-213
1 x Female Socket Housing Cap, 3 Pol, 61-13-1-383-552
2 x Male Pin Contact (AMP), 0.2-0.5 mm2, 61-13-0-005-198

b) Valve Connector: 6 pin black male housing with 4 female pins.
1 x Male Socket Housing, 6 Pol, 61-13-6-909-058
1 x Male Socket Housing Cap, 6 Pol, 61-13-1-383-816
4 x Female Bushing Contact (AMP), 0.2-0.5 mm2, 61-13-0-005-197

c) Switch: 6 pin black male housing with 6 female pins.
1 x Male Socket Housing, 6 Pol, 61-13-6-909-058
1 x Male Socket Housing Cap, 6 Pol, 61-13-1-383-816
6 x Female Bushing Contact (AMP), 0.2-0.5 mm2, 61-13-0-005-197

d) 2 loose contacts that plug into the electric seat module connector for power and ground that are either the 197 female or 198 male. Don't know but my guess is that they're female.

I have all the parts except the 6 pol male socket housing/cap (they're on order/ I ordered the female housing by mistake). Total MSRP cost for driver's side only (w/o harness and trim piece but w/ everything listed in para 4) is around $240. Less than $200 with CCA/shopping around.

Good Luck.

Good Luck.
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__________________
Joe
03 E39- S62B50 w/90K
00 E46/4- M52TUB25 w/156K
99 E36/8- S52B32 w/69K
95 E36/C- M50TUB25 w/230K

Last edited by JoeCinVa; 11-09-2003 at 07:35 AM.
  #12  
Old 11-09-2003, 09:31 AM
bmw325 bmw325 is offline
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Quote:
Originally Posted by JoeCinVa
I ordered (but have not installed yet) most of the parts (driver side only) and pics are below.
Can't tell you about your 9/02 car because my ETK goes only to 2/02 but I can't understand why the p/n would be different (unless superceded) if it's the same seat structure. FYI, I ordered my listed p/n about a month ago, so those p/n are still in the "system".

Refering to ETK diagram 61-1220. I don't get any differentiation with regard to memory or not. What I do get is that 403 and 404 are for seats with Electric Seats while 401 and 402 are for seats without electric seats. I don't believe memory or not matters because the lumbar position is not memorized. The difference btwn the 2 sets of wires is that electric seats allow you to tap into it's electric module (module A21) for power and ground whereas not having electric seats would require the 401 and 402 harness to be routed somewhere else for power and ground.

Those part numbers show up correctly in ETK diagram 61-1272 (325xiT, 2/2002). Plus, see the pic of the switch below.

Some comments on the pics/retrofit.
1) I'm pretty sure you don't have to take the seats out of the car. See the trim piece I bought below (less that $10). You have to unscrew (one screw) and unsnap it off your seat (can be done in car). You don't have to buy this piece, but I chose to so that I can see where the mounting tabs are, pre-cut the hole (I don't have a garage), plus it's cheap. Cut the hole out for the switch and the switch will snap into place. The only other piece you have to get out is the seatback.

2) The pad has two color coded tubes. Red and Blue.

3) The valve has 2 colored and 1 non-colored air "pips". Red and Blue go to the pad. The non-colored "pip" go to the pump.

4) I'm electing to build the harness myself (cheaper). The harness only has 3 connectors:

a) Pump Connector: 3 pin black female housing with 2 male pins.
1 x Female Socket Housing, 3 Pol, 61-13-8-377-213
1 x Female Socket Housing Cap, 3 Pol, 61-13-1-383-552
2 x Male Pin Contact (AMP), 0.2-0.5 mm2, 61-13-0-005-198

b) Valve Connector: 6 pin black male housing with 4 female pins.
1 x Male Socket Housing, 6 Pol, 61-13-6-909-058
1 x Male Socket Housing Cap, 6 Pol, 61-13-1-383-816
4 x Female Bushing Contact (AMP), 0.2-0.5 mm2, 61-13-0-005-197

c) Switch: 6 pin black male housing with 6 female pins.
1 x Male Socket Housing, 6 Pol, 61-13-6-909-058
1 x Male Socket Housing Cap, 6 Pol, 61-13-1-383-816
6 x Female Bushing Contact (AMP), 0.2-0.5 mm2, 61-13-0-005-197

d) 2 loose contacts that plug into the electric seat module connector for power and ground that are either the 197 female or 198 male. Don't know but my guess is that they're female.

I have all the parts except the 6 pol male socket housing/cap (they're on order/ I ordered the female housing by mistake). Total MSRP cost for driver's side only (w/o harness and trim piece but w/ everything listed in para 4) is around $240. Less than $200 with CCA/shopping around.

Good Luck.

Good Luck.

Very interesting-- this is the most information I've seen to date on retrofititng electric lumbar. QUestion-- I have manual sport seats w/ seat heaters-- would I be able to tap into the power/ground for the seat heaters to drive the lumbar? Or would that be a bad idea? For non-powered seats, what is the correct way-- are you supposed to run wires the fuse box? What fuse does the lumbar use?

Also, do you have any instructions on how to install the pump unit?
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Last edited by bmw325; 11-09-2003 at 11:42 AM.
  #13  
Old 11-09-2003, 09:47 AM
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racerdave racerdave is offline
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Thanks Rob and Doeboy... I was originally planning on getting the OBC... until I found out how easy it is to retrofit, particularly because I'm going to do the M3 wheel the day I get the car anyway.

So since I'm deleting the 300 for OBC, I can add the 450 for lumbar and not be too far off my original price point.

Thanks!
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  #14  
Old 11-09-2003, 09:54 AM
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Terry Kennedy Terry Kennedy is offline
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Quote:
Originally Posted by JoeCinVa
Can't tell you about your 9/02 car because my ETK goes only to 2/02 but I can't understand why the p/n would be different (unless superceded) if it's the same seat structure. FYI, I ordered my listed p/n about a month ago, so those p/n are still in the "system".
See the attached ETK capture which shows different parts for before and after 06/02. This is from an 09/03 ETK.
Quote:
Refering to ETK diagram 61-1220. I don't get any differentiation with regard to memory or not. What I do get is that 403 and 404 are for seats with Electric Seats while 401 and 402 are for seats without electric seats.
Take a look at the second attachment, which shows 401/402 for "EL. FRONT SEAT ADJUSTMENT W. MEMORY" vs. 403/404 for "ELECTR. FRONT SEAT ADJUSTMENT".
Quote:
Those part numbers show up correctly in ETK diagram 61-1272 (325xiT, 2/2002). Plus, see the pic of the switch below.
My 09/03 ETK doesn't even show a diagram 61_1272 for a 325xiT, 2/2002. I'll have to reinstall an older ETK and see if it shows up there.

Thanks for the additional info! Do the pump and pad come with all the necessary tubing?



  #15  
Old 11-10-2003, 08:53 AM
JoeCinVa JoeCinVa is offline
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1) Robg-

I'm sorry but I don't know exactly how the lumbar wiring works for non-electric seats. I found the lumbar w/ electric seats wiring diagram on bmwtis.com. If you're interested, sign up for the $20 day subscription and find out.

If you don't want to do that, then here are my thoughts. Personally, I wouldn't tap into the seat heating wires. I would just run it to the fuse box in the glove compartment and tap into the correct fuse. Speaking of which, I also do not know what fuse number it is but I am certain that the listing in the fuse box will have the information.

Ref physically mounting the pump and valve unit. The pump is just zip tied in position. The valve unit has a female screw receptacle on it so I anticpate there being some attachment point in the seat frame. If not, then I'll just zip tie this also.

2) Terry-

I don't know what else to say about the p/n's. Since the lumbar position isn't memorized the only inputs/outputs needed to enter the lumbar "system" is + and - and therefore as long as you get a matching group of parts (either the ones I ordered or what you dug up), it should work.

Yes, the pump and pad come with all necessry tubing. The pad comes with the red and blue tube already attached. The pump comes with a clear tube attached. All 3 tubes plug into the valve unit which is color coded. BTW, the valve unit controls an upper and lower air chamber in the pad which is unlike the single chamber pad I have on my E36.

OT: just got a Phatbox and am installing it into the E36. Can't wait to try out ********Voice. Thanks for the work.

3) Hope this helps. Good Luck.
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99 E36/8- S52B32 w/69K
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  #16  
Old 11-10-2003, 06:01 PM
bmw325 bmw325 is offline
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Thanks for your input, Joe. I'll sign up for the day subscription-- its certainly worth the $20 (I've done it once before just to peruse and download lots of pdfs). Do they have a document on BMWtis that describes all the fuse assignments for every possible accessory? Surprisingly, I could never find that (I looked when i signed up before)-- although it seems like a piece of info they would have.

Thanks for all of your informative posts (you too Terry). Although I've installed a manual inflatable lumbar that has gotten me past my initial seat comfort problems-- my OCD nature has me wanting to install the correct "factory" lumbar. Although-- if I confirm that I have to run wires all the way to the fuse box, the "PITA" factor will probably outweight the "ocd" factor , and i'll just live w/ my manual 2-way lumbar This would be my first wiring project--so I'm a little nervous--I need to learn how to read those wiring diagrams properly.

When do you plan to actually install these parts in your car, btw?

Quote:
Originally Posted by JoeCinVa
1) Robg-

I'm sorry but I don't know exactly how the lumbar wiring works for non-electric seats. I found the lumbar w/ electric seats wiring diagram on bmwtis.com. If you're interested, sign up for the $20 day subscription and find out.

If you don't want to do that, then here are my thoughts. Personally, I wouldn't tap into the seat heating wires. I would just run it to the fuse box in the glove compartment and tap into the correct fuse. Speaking of which, I also do not know what fuse number it is but I am certain that the listing in the fuse box will have the information.

Ref physically mounting the pump and valve unit. The pump is just zip tied in position. The valve unit has a female screw receptacle on it so I anticpate there being some attachment point in the seat frame. If not, then I'll just zip tie this also.

2) Terry-

I don't know what else to say about the p/n's. Since the lumbar position isn't memorized the only inputs/outputs needed to enter the lumbar "system" is + and - and therefore as long as you get a matching group of parts (either the ones I ordered or what you dug up), it should work.

Yes, the pump and pad come with all necessry tubing. The pad comes with the red and blue tube already attached. The pump comes with a clear tube attached. All 3 tubes plug into the valve unit which is color coded. BTW, the valve unit controls an upper and lower air chamber in the pad which is unlike the single chamber pad I have on my E36.

OT: just got a Phatbox and am installing it into the E36. Can't wait to try out ********Voice. Thanks for the work.

3) Hope this helps. Good Luck.
  #17  
Old 11-10-2003, 06:16 PM
NickACS NickACS is offline
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Hi Rob-
I am looking to sell my OEM Sport/Premium black leather seats from my '01 330i. I am swapping them out for aftermarket seats or E46 M3 ones.
If your interested at all, just email/PM me here

Thanks and good luck!
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  #18  
Old 11-11-2003, 07:15 PM
bmw325 bmw325 is offline
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Joe-

I looked at the wiring diagrams-- looks like I have to see if pin 13 of the yellow connector under the seat is active-- that would be the pin that would supply power (via fuse 65 for the driver's side-- at 30amps) to the lumbar and/or power seats (if I had them). since my car didn't come with power seats or lumbar, I have a bad feeling that its missing this wire. Pin 14 is the ground (which I would have).

Nick-- I actually prefer the manual seat adjustmets-- and only really want the lumbar. If you'd consider "parting out" the lumbar components in the driver's seat for a reasonable price-- I guess I'd consider that-- but I bet you probably don't want to do that.

Regardless, if doing this project would mean that I'd have to run a new wire to the fuse box (which I will unless by some miracle my car is pre-wired and pin 13 is hot), I probably won't go through w/ it.

I wonder if I could rig it up to run off of some sort of small battery ( since I wouldn't adjust it very much)?
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  #19  
Old 11-11-2003, 07:34 PM
NickACS NickACS is offline
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Hi Rob,
Yea, sorry I wouldn't want to part out the lumbar support But good luck on your project! I'm sure you'll end up with what you want..
Take care,
Nick
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  #20  
Old 11-12-2003, 09:22 PM
JoeCinVa JoeCinVa is offline
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Quote:
Originally Posted by robg
Although-- if I confirm that I have to run wires all the way to the fuse box, the "PITA" factor will probably outweight the "ocd" factor , and i'll just live w/ my manual 2-way lumbar This would be my first wiring project--so I'm a little nervous--I need to learn how to read those wiring diagrams properly.

When do you plan to actually install these parts in your car, btw?
Rob,

Don't be discouraged at running wires to the fusebox. If you think about it, this is really a good project to start off with wiring. You're only running 2 wires (if you're doing only one seat). Given the proper electrical tools, this is actually pretty easy. Let me know if I can help. BTW, I don't plan on doing this install for a couple of months. I've still got to finish off a couple of mods I'm doing to my E36. Good Luck.
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03 E39- S62B50 w/90K
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  #21  
Old 11-12-2003, 09:31 PM
bmw325 bmw325 is offline
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Quote:
Originally Posted by JoeCinVa
Rob,

Don't be discouraged at running wires to the fusebox. If you think about it, this is really a good project to start off with wiring. You're only running 2 wires (if you're doing only one seat). Given the proper electrical tools, this is actually pretty easy. Let me know if I can help. BTW, I don't plan on doing this install for a couple of months. I've still got to finish off a couple of mods I'm doing to my E36. Good Luck.

Thanks for the encouragement. When I think about it-- I guess its not the wiring aspect per se that would be the pain-- rather, it would be the pain of having to diassemble a lot of things to be able to propeperly run the wire from the seat to the fusebox. I assume to do it properly, I'd probably want to bundle the wire along the existing wires that go in the connector under the seat-which probably means untaping the mass of wires, adding mine and then retaping. Then, i'd have to remove the seats, the carpeting, the center console, the glovebox, the fusebox (and maybe more that I'm not thinkng of). Or is there some trick to running the wire to the fusebox without having to remove all that stuff? Also, you said 2 wires--but wouldn't it just be 1 wire (the power one) since the ground wire is already "hooked up" to the right pin on the seat connector? Just asking to make sure i'm not missing something.

QUestion on reading the wiring diagram--so if I look at the lumabr3.jpg diagram (for example), do the numbers (1,2,3,4,5,etc) next to the lines refer to the pin number on the connector? That's what they appear to be-- but just checking... I got confused-- because when I was looking at another diagram on BMWTIS.com, one of the numbers was 28- on a connector that only had 25 pins.
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  #22  
Old 11-12-2003, 10:44 PM
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Kaz Kaz is offline
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Wah, I haven't been keeping up with this project, and now I'm a little overwhelmed. I don't know how everyone else managed it, but I couldn't get the PNs for any of those parts out of the ETK (mine is 04/03). The info on the wiring and tubing , mounting, etc. are as I've suspected to date. I'm definitely interested in putting this in when it's all figured out, or even make some contributions if I can.

As for seat removal, I've done it in my car when I tried fitting the Vader, and it's actually not that tough. Now, my manual seats were actually lighter than the manual Vader seats, so they weren't much of a bear to handle.
  #23  
Old 11-13-2003, 08:32 AM
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Terry Kennedy Terry Kennedy is offline
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Quote:
Originally Posted by Kaz
Wah, I haven't been keeping up with this project, and now I'm a little overwhelmed. I don't know how everyone else managed it, but I couldn't get the PNs for any of those parts out of the ETK (mine is 04/03). The info on the wiring and tubing , mounting, etc. are as I've suspected to date. I'm definitely interested in putting this in when it's all figured out, or even make some contributions if I can.
Well, I ordered the complete kit of parts today (everything but the passenger harness should be in on Monday; the harness will take a bit longer) so I'll probably put together a full DIY like I did for my illuminated cupholder project. Of course, if I have any questions I'll be posting here...

In the 09/03 ETK, the parts are all there, except for the switch. They're on two diagrams - one for the seat harnesses in electrical, and one for the rest of the parts in seating.
  #24  
Old 11-13-2003, 09:50 AM
Kaz's Avatar
Kaz Kaz is offline
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Join Date: Dec 2001
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Mein Auto: 01 325iT, 88 M6
Quote:
Originally Posted by Terry Kennedy
In the 09/03 ETK, the parts are all there, except for the switch. They're on two diagrams - one for the seat harnesses in electrical, and one for the rest of the parts in seating.
OK, I found the PNs for the pump, valve and airbag. Has the PN for the switch actually been determined? I couldn't find it in the X5 (which uses the same mech) section either.
  #25  
Old 11-13-2003, 09:56 AM
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Terry Kennedy Terry Kennedy is offline
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Quote:
Originally Posted by Kaz
OK, I found the PNs for the pump, valve and airbag. Has the PN for the switch actually been determined? I couldn't find it in the X5 (which uses the same mech) section either.
According to JoeCinVa, it shows up in his 02/02 ETK. My 09/03 ETK only shows that part number as applying to various 5 and 7 series.
 

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