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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 09-25-2012, 06:33 PM
klixtokw klixtokw is offline
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Mein Auto: bmw 325 ci vert E46 frame
3 series E-46 (1999 to 2006) convertibles

Does anybody have any pictures or instructions of where is the motor/pump unit for the top is on a 2004-325CI Convertible? Any instructions on how to get to it and how to remove the body covering?
Any help or experience would be appreciated.
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  #2  
Old 09-25-2012, 07:17 PM
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MMME30W MMME30W is offline
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Might try entering last seven of the VIN into www.realoem.com for parts diagrams?
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  #3  
Old 09-26-2012, 09:07 AM
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SJBimmer SJBimmer is offline
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Quote:
Originally Posted by klixtokw View Post
Does anybody have any pictures or instructions of where is the motor/pump unit for the top is on a 2004-325CI Convertible? Any instructions on how to get to it and how to remove the body covering?
Any help or experience would be appreciated.
Motor and pump is under the felt covering on the drivers side in the trunk. Control unit is behind the panel under the rear window on the drivers side.
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  #4  
Old 09-26-2012, 01:35 PM
klixtokw klixtokw is offline
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Quote:
Originally Posted by MMME30W View Post
Might try entering last seven of the VIN into www.realoem.com for parts diagrams?
Thanks I will give that a shot. My top will not go down by itself but if I give it a push it will complete the cycle. On the way up the same if I give it a tug it will rise and complete the cycle. When it gets stuck before i help it I can hear the motor whinning that is why i suspect it may be the culprit since I have not seen any evidence of hydraulic fluid anywhere even though i have not uncovered the motor or the hydraulic cylinders to better estimate if there are any leaks. I don't believe its electrical since it works although it may be a position sensor but it would be a great coincidence that two of them would fail at the same time although at the beginning the problem was only on the opening of the top and the closing was OK but then in a few days the closing also started to get stuck at the beginning and needing a pull to get it going by itself.

Any experience or knowledge in this matter would be appreciated.
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  #5  
Old 09-26-2012, 01:49 PM
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SJBimmer SJBimmer is offline
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Try this first:

http://www.bimmerfest.com/forums/sho...d.php?t=540680

You may also be low on hydraulic fluid. The reservoir is transparent and has a full mark for reference. It is on the drivers side of the trunk under the moulded felt covering.
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  #6  
Old 09-27-2012, 08:11 AM
klixtokw klixtokw is offline
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Quote:
Originally Posted by SJBimmer View Post
Try this first:

http://www.bimmerfest.com/forums/sho...d.php?t=540680

You may also be low on hydraulic fluid. The reservoir is transparent and has a full mark for reference. It is on the drivers side of the trunk under the moulded felt covering.
Thanks SJ that is a good link and will help me to reduce the load on the motors and Hydraulic cylinders. I thought of the hydraulic fluid and the relays that hold and release the fluids but I can't figure out how to remove the darn moulded felt covering moulding! If anyone has tacled this job or has pictures of how to remove or knows of a manual that shows this task please let me know. I have been looking at it and removed a few screws but its not clear if the mounding comes out or I have to remove many other trims that overlap above it.
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  #7  
Old 09-27-2012, 08:38 AM
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You will like this link also.

http://www.bmwmotorsports.org/BMW_docs/converttops.pdf
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  #8  
Old 09-27-2012, 08:47 AM
klixtokw klixtokw is offline
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Quote:
Originally Posted by MMME30W View Post
Might try entering last seven of the VIN into www.realoem.com for parts diagrams?
Thanks MMM this link was very useful and I was able to get prices. But the diagrams are very general and not specific enough to help for a repair they are geared towards ordering parts.
Nevertheless It was very helpful to learn about some of the parts and their prices WOW!
If you have any idea of how to take off the trunk trim to uncover the hydraulic pump unit please share the info.
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  #9  
Old 09-28-2012, 10:11 AM
klixtokw klixtokw is offline
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Quote:
Originally Posted by SJBimmer View Post
SJB you are right this is for an E36 top not for my E-46 but is very similar and I like it very much. It has help me get an idea of where the parts are. I was able to remove the trim on the trunk to expose the top hydraulic container and motor. The top cover motor is not in the trunk though but under the back seat. Now i have to play with the top to see if the motor is the culprit. I do have a full hydraulic container so I have no leaks.
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  #10  
Old 09-28-2012, 03:17 PM
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Quote:
Originally Posted by klixtokw View Post
SJB you are right this is for an E36 top not for my E-46 but is very similar and I like it very much. It has help me get an idea of where the parts are. I was able to remove the trim on the trunk to expose the top hydraulic container and motor. The top cover motor is not in the trunk though but under the back seat. Now i have to play with the top to see if the motor is the culprit. I do have a full hydraulic container so I have no leaks.
From what I have read, the tops are almost identical with the exception of the top cover motor, as you noted. You may also want to check the continuity of the wires in the loom that run along the top on the drivers side. From posts by others, I have learned that these wires are susceptible to cracking and that an intermittent connection can cause strange top operation. You may also want to try having someone hold up the corners of the top cover while you try to lower the top. If that works the top cover mechanism may need to be adjusted to trigger the switch that signifies that the cover is open. Good luck!
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  #11  
Old 09-28-2012, 05:54 PM
klixtokw klixtokw is offline
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Quote:
Originally Posted by SJBimmer View Post
From what I have read, the tops are almost identical with the exception of the top cover motor, as you noted. You may also want to check the continuity of the wires in the loom that run along the top on the drivers side. From posts by others, I have learned that these wires are susceptible to cracking and that an intermittent connection can cause strange top operation. You may also want to try having someone hold up the corners of the top cover while you try to lower the top. If that works the top cover mechanism may need to be adjusted to triggeover is operted by a hydraulic cylinder not a motor.r the switch that signifies that the cover is open. Good luck!
Thanks! The tops are similar but there are important differences. I don't think I have the wires that run along the top. I saw them running on the drivers side sidewall under the windows and can be seen when removing the back seat. At least I believe they are the wires that run in the E36 top. It makes more sense there. Also I think I only have, on my E46, the pump motor and the 2 latching motors and the top cover is opened with a hydraulic cylinder.
I will try to lubricate the top mechanism as shown by one of the postings here and that may reduce the friction and the load on the motor and maybe it will work since my problem seems to be that the motor does not develop enough hydraulic pressure to raise the top.
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  #12  
Old 09-30-2012, 07:09 PM
jimvideopro jimvideopro is offline
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If you're not familiar with it, e46fanatics.com has a subforum dedicated to convertibles... worth spending some time there. You may be able to find a specific answer to your question already posted.
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Last edited by jimvideopro; 09-30-2012 at 07:10 PM. Reason: addl info
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  #13  
Old 09-30-2012, 11:18 PM
klixtokw klixtokw is offline
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Quote:
Originally Posted by jimvideopro View Post
If you're not familiar with it, e46fanatics.com has a subforum dedicated to convertibles... worth spending some time there. You may be able to find a specific answer to your question already posted.
Thanks I have been there.
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  #14  
Old 10-01-2012, 04:37 PM
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Only 2 things left to check are:

1) Make sure your battery is in perfect condition, as raising and lowering the top takes a lot of juice. A weak battery may affect top operation.
2) Double check all wires that run into the trunk. The wires also sometimes break in the loom that runs to the trunk. G. P. Burdell has the facts in this post.

http://www.bimmerfest.com/forums/sho...d.php?t=511230

If you solve your problem, be sure to post back with the solution!

Good luck!

Last edited by SJBimmer; 10-01-2012 at 04:39 PM.
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  #15  
Old 10-02-2012, 12:50 AM
klixtokw klixtokw is offline
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Thanks SJB, I always operate the top with the engine running so the battery would not be a concern. And the wires are fine and everything electrical works fine. I believe that I need fluid in the pump but no one can tell you which is the hydraulic fluid used by BMW. IF ANYONE KNOWS WHICH FLUID IS USED ON A 2004 325CI VERT PLEASE LET ME KNOW BECAUSE THE DEALER DID NOT KNOW OR EVEN STOCK IT. I DO NOT WANT TO MIX DIFFERENT FLUIDS BECAUSE THAT COULD CAUSE OTHER PROBLEMS MAYBE.
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