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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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Old 09-18-2013, 02:25 PM
Mfivestar Mfivestar is offline
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crankshaft position sensor

02 330i

Has anyone changed the crankshaft position sensor on their 330i? Specifically the sedan. i seen a couple right ups, but they were both coupes, and they seem to have a slightly different setup. I removed the intake assembly, all tubing, the vanos? box, but on the coupe they have a black canister that opens and closes a muffler flap? On the sedan I do not have that canister, but the sensor on the coupe was said and shown in pic to be right under that canister. On the sedan it does not appear to be in that same location, is it under or above the starter? or behind it? I had a flashlight but couldnt locate it.

Any pictures or advice from someone that has changed the sensor on their sedan would be great. Thanks
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  #2  
Old 09-18-2013, 04:48 PM
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ahull ahull is offline
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https://www.bimmerfest.com/forums/sho...t=crank+sensor

looks like it's under the starter. I know it has been discussed some before.... do some more searching and I bet you'll find a good thread. If you find a good one, post the link and I can add it to the wiki next to the camshaft sensor write-ups.
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Old 09-18-2013, 06:46 PM
latitude39 latitude39 is offline
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Quote:
Originally Posted by Mfivestar View Post
02 330i

Has anyone changed the crankshaft position sensor on their 330i? Specifically the sedan. i seen a couple right ups, but they were both coupes, and they seem to have a slightly different setup. I removed the intake assembly, all tubing, the vanos? box, but on the coupe they have a black canister that opens and closes a muffler flap? On the sedan I do not have that canister, but the sensor on the coupe was said and shown in pic to be right under that canister. On the sedan it does not appear to be in that same location, is it under or above the starter? or behind it? I had a flashlight but couldnt locate it.

Any pictures or advice from someone that has changed the sensor on their sedan would be great. Thanks
I've done the job in my '02 325xi (11/2001 production). I took photos. Here are some.
If you don't want to remove the starter--and the intake manifold--you should use 1/4 extensions with "wobble" fittings to allow the shaft to flex just a bit.

I did the job with the ball-head 5mm allen wrench in the 3rd photo. I do *not* recommend this tedious approach. Wobble extensions (1/4") are needed to get past that engine block flange that bolts up to the transmission.

I recommend caution when turning that 5mm hex-head bolt. It was pretty stiff turning the bolt. That's due to the blue, gummy compound holding the bolt fast. Use a new, high-quality 5mm allen key and make sure it is *fully seated* lest you ream out the hex sides. Somebody did this, in my reading, and had an "interesting" day getting it out.
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Last edited by latitude39; 09-18-2013 at 07:24 PM.
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  #4  
Old 09-18-2013, 06:57 PM
Mfivestar Mfivestar is offline
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Quote:
Originally Posted by latitude39 View Post
I've done the job in my '02 325xi (11/2001 production). I took photos. Here are some.
If you don't want to remove the starter--and the intake manifold--you should use 1/4 extensions with "wobble" fittings to allow the shaft to flex just a bit.

I did the job with the ball-head 5mm allen wrench in the 3rd photo. I do *not* recommend this tedious approach. Wobble extensions (1/4") are needed to get past that engine block flange that bolts up to the transmission.
awesome thanks for the great pictures. Im assuming you thought of this before you did the repair, but would this job be possible from the underside?
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Old 09-18-2013, 07:19 PM
latitude39 latitude39 is offline
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Originally Posted by Mfivestar View Post
awesome thanks for the great pictures. Im assuming you thought of this before you did the repair, but would this job be possible from the underside?
Yes, I did think about getting to the CPS from under the car. However, my ALL-WHEEL-DRIVE has a big, square steel subframe that blocks easy access. Your 330i (RWD) may not have the same problem. I seem to recall reading about somebody doing this from beneath. That writeup was here on the 'fest or on fanatics, I don't recall.

I have notes on the 1/4" tool I have envisioned that would have saved me hours. If anybody wants to do the job from the top, I will share my notes, on request.
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  #6  
Old 09-19-2013, 09:09 AM
latitude39 latitude39 is offline
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Tool to access 5mm bolt

Here's a tool that I envisioned *after* I did the very tedious job of removing and installing the single bolt that holds the CPS in place.

Removal of the bolt is made difficult because of the starter's mounting flange, which prevents a straight-on hex socket from going in. You've got to make some wiggle room. I didn't have "wobble" extensions at the time but have since acquired them, shown in these photos.

Warning: I have not tested this but I'm pretty sure it will work.

When I did the job, I used a 5mm hex key with a ball-socket on the end to provide wiggle room. This was a miserable and time-consuming task. I hope my
insight can help someone.

A further complication is that the bolt is held in with the resinous blue stuff that makes each turn of the wrench a chore. A 3/8" ratchet would be ideal for leverage. Fully seat the hex tool and turn carefully.

Notes
  1. Arrange the wobble extensions any way that works. I suggest having a short, medium and long extension
  2. A 1/4" 5mm hex socket may work and would save you from having to make the Dremel cut
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