Complete list of all o-rings (by size & by part number) to buy when ordering parts

I was ordering oil filters today when I realized I should have a ready-made list of o-rings by part number to get while I'm already ordering other stuff (not just for oil changes but for all maintenance jobs).

• Mann HU925/4x, Mahle OX/154/1D, Hengst E106H D34, oil filter (or BMW P/N 11427512300)
• An extra hollow oil pan drain bolt (M12x1.5x18, BMW P/N 11131273093)
• An extra copper crush washer (A12X17-CU, BMW P/N 07119963151
• O-rings ... But which ones?

It was untimely, while on the phone, coming up with the part numbers on the fly for optonal o-rings, so, I belatedly realized that it would have been useful to have a ready-made list all the o-rings we might wish to keep in mind to get the 'next' time we're already buying parts.

Here's my starter list below - but the point of this thread is for others to ADD other necessary maintenance o-rings (& rubber o-ring-like gaskets) for adding to existing orders and to keep in stock in the garage.

NOTE: Please make sure the part number and the size & quantity needed is listed!

• Two small o-rings on the bottom of the oil filter stem
  • 11427549573, 7mm ID x 2.5mm Thick (Quanty=2)
• Two small o-rings at the top of the oil dipstick,
  • 11431717666, 9mm ID x2.2mm Thick (Quantity=2) $0.73 each
• Large o-ring on oil filter cap (usually comes with the oil filter)
  • 11421741000, 91mm ID x4mm Thick (Quantity=1)
• Large o-ring at the bottom of the dipstick guide tube
  • 11431740045, 19.5mm ID x3mm Thick (Quantity=1) $1.81 each
• Power steering cap o-ring
  • 32411128333, unknown size (Quantity=1) $2.38 each
• Lower radiator hose coolant temperature sensor o-ring (p/n is for the air temperature sensor in the intake manifold)
  • 13621743299, 8mm ID x 3mm Thick (Quantity=1) $1.25 each
• Oil filter housing oddly shaped gasket
  • 11421719855 (Quantity=1) $6.08 each
• DISA o-ring gasket
  • 11617504543, 50mm ID x 3.5mm Thick (Quantity=1) M52TU DISA o-ring
  • The M54 DISA uses 51mm x 2.5mm Viton flourosilicone o-rings,
    • The closest SAE size is #139 or #140 but #139 is most recommended, Viton, fluerosilicon is best, McMaster-Carr P/N 9396K78

EDIT:
By way of example, here are current prices from 4wheelsautoparts (which I assume are typical out there):

- 2 x Oil Filter Stem Seal, Lower (11427549573) = $3.64 ($1.82 each)
- 2 x Oil Dipstick Seal, Upper (11431717666) = $1.30 ($0.65 each)
- 1 x Oil Filter Kit, including O-ring, copper seal, and Mann filter (11427512300) = $4.60
- 1 x Oil Dipstick Seal, Bottom (11431740045) = $0.56
- 1 x Oil Drain Plug Bolt (11131273093) = $1.74
- 1 x Power Steering Reservoir Gasket Ring (32411128333) = $1.49

Injector O-ring lower (Injector-to-engine) p/n 13641437486
Injector O-ring upper (Injector-to-fuel rail) p/n 13641437487

CPS to engine O-ring p/n 12141748398 (Item #9)




CPS O-ring (Intake & exhaust) p/n 12141748398 (Item #6)

WP O-ring p/n 11511711484

Water inlet/outlet pipe O-ring p/n 11531435808 (Item #7)



Distribution piece O-rings p/n 11617502761

ICV grommet (big soft "O-ring") p/n 11611437453

DISA valve O-ring - check German Auto Solutions (Gary)

Originally Posted by bluebee

[*] Power steering cap o-ring

• 32411128333, unknown size (Quantity=1) $2.38 each

If anybody can tell me how to get the PS reservoir O-ring installed, that would be great. I cannot get it to stretch enough to sit, and stay, in the recess. And yes, the old O-ring has been removed.

Thanks!!!

Originally Posted by crazy4trains

how to get the PS reservoir O-ring installed

This isn't really the thread for that; the right thread for that would be found by typing /power steering F3 in the bestlinks, which comes up with this:
- How to remove and replace the power steering cap o-ring (1) (2)

Interesting thread. I have ignored (or more to the point, been ignorant of) these o-rings completely. Are there any recommended change intervals for these o-rings from any reputable source? I don't remember seeing any guidance in Bentley's. And I hate looking through the TIS. Mine are all probably original. Another thing(s) to replace...

Originally Posted by Fudman

Interesting thread. I have ignored (or more to the point, been ignorant of) these o-rings completely. Are there any recommended change intervals for these o-rings from any reputable source? I don't remember seeing any guidance in Bentley's. And I hate looking through the TIS. Mine are all probably original. Another thing(s) to replace...

I know last summer when I changed the O-rings on the distribution piece, they were hard as rock. Literally. The new ones are a tad softer - they are hard to replace.
They do deteriorate in time, sometimes it's a leak (like the oil leak by the CPS). Sometimes it's vacuum leak (DISA). BTW, Gary's O-rings work well, BUT: make sure you lube them lightly, then when you re-install the DISA, be VERY GENTLE in pressing it in. You have to actually rotate it back and forth and press it very gingerly in. Otherwise, the new O-ring will shear. Ask me how i know.
The PS O-ring, once you start seeing ATF on the canister - it's a dead givaway. I always thought it's soiled because of the vent hole. I was wrong. Since I change that sucker, I never had a drop of the red stuff staining the canister.

Originally Posted by Fudman

Are there any recommended change intervals for these o-rings from any reputable source?

According to RDL in post #118 here, the BMW TIS recommends the two little o-rings on the bottom of the oil-filter-housing stem to be replaced at EVERY oil change!
- How NOT to change your oil!

I doubt anyone does it that frequently - but it's apparently in that TIS.
All I have is this screenshot ... so if you have the TIS - let us know what it actually says.

Originally Posted by bluebee

This isn't really the thread for that; the right thread for that would be found by typing /power steering F3 in the bestlinks, which comes up with this:
- How to remove and replace the power steering cap o-ring (1) (2)

The O-ring I bought appears to be too small and I can't get it to stay in the miniscule recess. Such a simple thing but very frustrating.

It's too cold right now to mess with any further so I'll try again later.

Originally Posted by bluebee

According to RDL in post #118 here, the BMW TIS recommends the two little o-rings on the bottom of the oil-filter-housing stem to be [B][COLOR=DarkRed]replaced at EVERY oil change!

Well, THAT hasn't happened! Every 100K sounds about right for me!

Originally Posted by Fudman

Well, THAT hasn't happened!

That's the way for most of us.

In fact, this is a picture (from this classic priming-oil-filter thread) of my very first oil change (please ignore the embarrassing $18 STP filter! I've since learned my lesson.)


Given this picture from this thread, I doubt my o-rings have EVER been changed (since I'm only the 2nd owner):



According to cn90, those two o-rings don't seem 'all' that important, functionally, though:
-> E39 (1997 - 2003) > DIY: E39 Changing engine oil made simple (how to do it in 30 minutes and not crying!)

Note: The diagram below is from this thread.

Note: The diagram below is from this thread.


EDIT: Doing research as to WHAT each of these o-rings does, I find this interesting comment and video:

Originally Posted by fuzzynations

I did a few searches and found the round o-ring gasket for the oil filter housing fails, and the inside of the filter has a weak seam allowing unfiltered oil to pass through.

Originally Posted by doru

CPS to engine O-ring p/n 12141748398 (Item #9)
CPS O-ring (Intake & exhaust) p/n 12141748398 (Item #6)

EDIT: I just realized that all the confusion may be due to the fact that one of these "CPS" above may actually be a CKP (crankshaft) while the other two are CPS (camshaft)!

Interestingly, here is a picture of a reputed CPS o-ring gone bad just now reported today:


These photos from this thread show the M54 intake CPS & exhaust CPS locations:


A good picture of the CPS o-ring is in this thread:

Originally Posted by doru

CPS to engine O-ring p/n 12141748398 (Item #9)
CPS O-ring (Intake & exhaust) p/n 12141748398 (Item #6)

EDIT: I'm very confused. I think one of these CPS's must actually be a CKP. Right?

Having had no experience with the camshaft position sensor (aka CPS) or the crankshaft position sensor (aka CKP), I'm a little confused about how many CPS o-rings are needed, as three seem to be listed - but they're all the same part number???

• 11 Engine > 11 15 Cylinder Head > Cylinder Head Vanos
  • # 06 Intake CPS O-ring 17mm ID x 3mm thick 12141748398 $1.20 <=== am I right that these are for the camshaft
  • # 06 Exhaust CPS O-ring 17mm ID x 3mm thick 12141748398 $1.20 <=== am I right that these are for the camshaft
• 11 Engine > 11 10 Engine Housing > Engine Block Mounting Parts
  • # 09 CKP to engine O-ring 17mm ID X 3mm thick 12141748398 $1.20 <=== am I right that these are for the crankshaft

For the record, this entire thread is on the M54 engine DISA o-ring, for folks coming here the first time.

The conclusion is to use a #139 Viton O-Ring.


The reason is shown below:

I just remebered last year when I replaced the PS hoses. There are 2 small O-rings p/n 17211742636 (item #11) that go to the heat exchanger.

i am too lazy to replace large o-ring on oil filter with every oil change
normally it lasts forever ( if you dont screw it ) , never oil leak from it

I searched realoem for O-ring. The search returned a list parts with the term "ring" in the description. I edited the list to include only the descriptions with the term "O-ring". Hope this helps.

Here's the list:

Part 12141748398 (O-ring) found in: Engine Block Mounting Parts
Part 11361703713 (O-ring) found in: Cylinder Head Vanos
Part 12141748398 (O-ring) found in: Cylinder Head Vanos
Part 11511711484 (O-ring) found in: Waterpump - Thermostat
Part 11431717666 (O-ring) found in: OIL PAN/OIL LEVEL INDICATOR
Part 11431740045 (O-ring) found in: OIL PAN/OIL LEVEL INDICATOR
Part 11421741000 (O-ring) found in: Lubrication system-Oil filter
Part 11421744001 (O-ring) found in: Lubrication system-Oil filter
Part 11427549573 (O-ring) found in: Lubrication system-Oil filter
Part 11531435808 (O-ring) found in: Cooling System Water Hoses
Part 11417507429 (O-ring) found in: Lubrication system/Oil pump with drive
Part 11411722837 (O-ring) found in: Lubrication system/Oil pump with drive
Part 13621743299 (O-ring) found in: Intake manifold system
Part 11617502761 (O-ring) found in: Intake manifold system
Part 12141748398 (O-ring) found in: Sensors
Part 12141748398 (O-ring) found in: Sensors
Part 13711720540 (O-ring) found in: Intake muffler
Part 13641437487 (O-ring) found in: VALVES/PIPES OF FUEL INJECTION SYSTEM
Part 13641437486 (O-ring) found in: VALVES/PIPES OF FUEL INJECTION SYSTEM
Part 13531720251 (O-ring) found in: Fuel filter, pressure regulator
Part 13531720252 (O-ring) found in: Fuel filter, pressure regulator
Part 17211742636 (O-ring) found in: TRANSMISSION OIL COOLING
Part 24201423387 (O-ring) found in: A5S325Z lubrication system
Part 24311422806 (O-ring) found in: A5S325Z lubrication system
Part 24201217321 (O-ring) found in: A5S325Z Output
Part 24341421736 (O-ring) found in: A5S325Z wiring/oil filt./pulse generator
Part 24101423176 (O-ring set) found in: A5S360R/390R ctrl unit with mount.parts
Part 32321094182 (O-ring) found in: STEERING LOCK/IGNITION SWITCH
Part 17211742636 (O-ring) found in: HYDRO STEERING-OIL PIPES
Part 33117525064 (Screw plug with O-ring) found in: Final drive, gasket set
Part 34311165092 (BRAKE MASTER CYLINDER O-RING) found in: BRAKE MASTER CYLINDER/EXPANSION TANK
Part 34311165092 (BRAKE MASTER CYLINDER O-RING) found in: Power brake unit depression
Part 64118385686 (O-ring set) found in: HEATER RADIATOR AIR CONDITIONING

EDIT: added files, remove .pdf.

Originally Posted by Steve530

Here's the list:

Thanks for that list.

It would be nice if a supplier puts together a kit for our E39s.

I can see them making a profit because, in bulk, the o-rings are pennies, whereas they can charge us a buck or so, and the kits won't take a lot of room on the shelf, and can be easily adapted for other vehicles.

By way of update, my rubber "kit" arrived today, complete with a few extra sets of the hard-to-find 441 (61610154441) wiper blade inserts and a spare oil bolt & crush washer, in addition to the list of o-rings earlier discussed in this thread, each in their own labeled baggy.

Looks like you got a new HID lamp, too.

I've attached the list I posted above, supplemented with parts listed as gasket seals and sorted by application. It's a PDF file. If anyone needs the spreadsheet, PM me.

Originally Posted by Steve530

I've attached the list I posted above, supplemented with parts listed as gasket seals and sorted by application.

Wow. Very nice. This is a complete 'kit' for a supplier to create for us, since most of our o-rings are a decade old by now. We could then put the kit on our garage shelf, and, whenever we're taking apart something nearby, we'd have the handy o-ring to replace.

For example, when doing the CCV, we could do the CKP and CPS o-rings, in addition to the lower dipstick tube o-ring.

Originally Posted by Steve530

Looks like you got a new HID lamp, too.

You're observant! I sat down to open the box that came in the mail, and as I laid everything out to compare to the invoice, I snapped the photo, so I hadn't thought of mentioning the bulb.
I bought the bulb because my low beam indicated it was out. Funny thing - the moment I pulled the old bulb out, it lit right up in my hands.
So now I have an extra H7 bulb, just in case, to stock along with my o-rings.
Oh well, it will eventually get used (as long as I don't lose it, which I am wont to do).
Hmmmm...
Maybe we can open a separate thread, that references this thread for o-rings, that lists all the "stuff" that we can stock to put on the shelf - that our ten year old bimmers are gonna eventually need.

EDIT: I opened this thread for all "stuff" that we probably should stock in our garage:
- Complete list of E39 stuff (parts, tools, fluids) to stock for handy eventual use

Updated post #18.

Originally Posted by doru

I know last summer when I changed the O-rings on the distribution piece, they were hard as rock.

Is this the DIY thread for those o-rings:
> E39 (1997 - 2003) > Injectors replacement and/or servicing DIY

Originally Posted by bluebee

Is this the DIY thread for those o-rings:
> E39 (1997 - 2003) > Injectors replacement and/or servicing DIY

No - those are injectors O-rings. The distribution piece O-rings look similar, they are smaller and VERY hard. The old ones are even harder. Very hard to take them off, if you want to pull on them, which I did. I didn't use any sort of blade by fear of cutting the distribution piece, which is plastic. The O-rings for the distribution piece are p/n 11617502761 (Item #6 below)