Post Reply 
 
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
e46 Wheel speed sensor cleaning
21-03-2011, 08:38 PM (This post was last modified: 22-03-2011 06:06 PM by Sankekur.)
Post: #1
e46 Wheel speed sensor cleaning
So yesterday evening while driving on the highway back home from Uber my car gave a beep like when you apply the handbrake while the car is moving or when the outside temperature goes below 3 degrees C, but together with it the DSC, ABS and handbrake lights came on, so it was obvious that there was something wrong with driving aids system. As it was raining heavily and had done so for a couple of days, I though it might either be the wheel speed sensors that had gotten very dirty and needed a clean, or water might have gotten into the area where all the DSC/ABS stuff are. After getting home I quickly eliminated the latter as the the area was bone dry. So that left the wheel speed sensors to be checked an cleaned. I proceeded to do it this afternoon, and to post a DIY while I am at it, this is of course for my 330i but I am sure it is the same on other e46's as well.

Right so here goes.

The first step is to stop the car from eating the jack Bluebiggrin
[Image: DSCN1613.jpg]

After you are done rescuing the jack, jack up the front of the car and then turn the wheels to full lock (either way). This will allow you to access the sensor from the front of the car
[Image: DSCN1627.jpg]

To remove the sensor remove the single 5mm allen bolt, then to remove it wiggle it from side to side. You might need to wiggle it quite a bit as they can be bit though to get out.
[Image: DSCN1626.jpg]

Once out it looks like this
[Image: DSCN1630.jpg]

I then gave a good clean using some clean green and a toothbrush
[Image: DSCN1631.jpg]

To replace just push it back into the hole and fasten the bolt again.

Then turn the front wheels to the other side to access the sensor on the other side and remove it in the same way and clean it. The one on this side was pretty dirty
[Image: DSCN1633.jpg]
Clean it replace it.

For the ones at the back, jack up the back end of the car and remove the back wheels of the car
[Image: DSCN1648.jpg]

The sensors are located just behind the discs (behind the plate behind the disc at least) to the front of the car.
[Image: DSCN1647.jpg]

To remove again loosen the bolt and wiggle it up and down to get it free
[Image: DSCN1646.jpg]

This is what it looks like removed
[Image: DSCN1650.jpg]

The just clean and replace and do it on the other side is as well.
And you are done Bluebiggrin

Unfortunately this did not solve my problem Sad or at least the error codes might still need to be reset for the warning lights to go off (I have no idea) (Edit: Ok, so it seems that you need drive the car so that the speed registers on the speedometer before the codes reset, so the warning lights are now out Bluebiggrin) , or something else is wrong, either way I will probably need to get the codes read, but hopefully someone else find this helpful.

\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\

/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\

\


\


\\






\\


\
*

*
*
*
*
*
*
*
*
*
*
**
*

**
*
**
**
*
**

***




***


***
******

***********
Find all posts by this user
Add Thank You Quote this message in a reply
[-] The following 4 users say Thank You to Sankekur for this post:
AcidBurn (11-26-2012), bmcfarland (04-02-2012), Jjjbay (11-08-2014), Pho3niX90 (11-01-2012)
21-03-2011, 09:09 PM
Post: #2
RE: e46 Wheel speed sensor cleaning
awesome write up Bluebiggrin

Visit this user's website Find all posts by this user
Add Thank You Quote this message in a reply
21-03-2011, 10:55 PM
Post: #3
RE: e46 Wheel speed sensor cleaning
Very nicely documented! Will show this to my father in law since he also has an E46.

BMW E90 330i (M) '05 (His)
BMW E46 320i f/l (M) '03 (Hers)
Isuzu KB300 LX 4x2 DC Dmax (M) '07
ex: Toyota Corolla 160i GLE (M) '99
[Image: BMW_E90_330i_Banner-1.gif]
[Image: 94272.png]
YouTube Vids

...the occupants are not road-worthy...
Find all posts by this user
Add Thank You Quote this message in a reply
22-03-2011, 08:35 AM
Post: #4
RE: e46 Wheel speed sensor cleaning
Nice write-up Thumbsup2

Also had this problem a few weeks ago after driving in heavy rain (and going through a deep water patch). However, only had the symptoms (DSC lights, etc) appear once on the next day and was fine afterwards. Probably still need to clean the sensors when I get some time.

[Image: Fogs-small_zpsbc4e681f.png]
Find all posts by this user
Add Thank You Quote this message in a reply
22-03-2011, 06:11 PM (This post was last modified: 22-03-2011 06:11 PM by Sankekur.)
Post: #5
RE: e46 Wheel speed sensor cleaning
So it seem that you actually need to drive that car at a speed that registers on the speedometer in order for the warning lights to go out, so the warning lights are now off Bluebiggrin
(I edited the first post, and added this info)

And thanks for the comments guys, hopefully this can help you out in the future.

\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\

/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\

\


\


\\






\\


\
*

*
*
*
*
*
*
*
*
*
*
**
*

**
*
**
**
*
**

***




***


***
******

***********
Find all posts by this user
Add Thank You Quote this message in a reply
02-10-2011, 01:24 PM
Post: #6
RE: e46 Wheel speed sensor cleaning
mine has done this now twice on start up will give them a clean tomorrow... sank are your errors gone now?

Visit this user's website Find all posts by this user
Add Thank You Quote this message in a reply
03-10-2011, 01:30 PM
Post: #7
RE: e46 Wheel speed sensor cleaning
cleaned Bluebiggrin

just a slight alteration to your write up... you dont have to jack the front its really easy to get them you with just turning out the wheels on the front...

the rears seem to get dirtier than the fronts so maybe is one is lazy you could clean the rear 1st and see if the error clears Fencelook

Visit this user's website Find all posts by this user
Add Thank You Quote this message in a reply
03-10-2011, 06:35 PM
Post: #8
RE: e46 Wheel speed sensor cleaning
Cool, that is a handy tip, thanks.

Yup the warnings are gone and have been gone since I cleaned them.

\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\

/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\

\


\


\\






\\


\
*

*
*
*
*
*
*
*
*
*
*
**
*

**
*
**
**
*
**

***




***


***
******

***********
Find all posts by this user
Add Thank You Quote this message in a reply
03-10-2011, 07:24 PM
Post: #9
RE: e46 Wheel speed sensor cleaning
well mine did not appear again today so lets see how it goes...

the Pre F/L sensors are a bit different they have alot more surface area that touch the hole the front ones took alot of wiggling to come out...

Visit this user's website Find all posts by this user
Add Thank You Quote this message in a reply
04-10-2011, 07:08 AM
Post: #10
RE: e46 Wheel speed sensor cleaning
Cool, I hope it stays sorted =)


\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\

/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\

\


\


\\






\\


\
*

*
*
*
*
*
*
*
*
*
*
**
*

**
*
**
**
*
**

***




***


***
******

***********
Find all posts by this user
Add Thank You Quote this message in a reply
02-04-2012, 07:30 PM
Post: #11
RE: e46 Wheel speed sensor cleaning
My first post here, great info on this site, thanks to all of you!

I recently bought a 2001 330XI (E46), and during a very slushy, dirty road kind of day, I had the symptoms described here. Speedo erratic (or all the way dead), DSC and ABS lights on. After pulling over, and shutting down, restarting, all was well, all lights out, speedo worked and has been fine for a week or so now.
I have researched this on other forums as well, and the consensus seems to be the left rear wheel speed sensor, due to the speedo errors.
Just to be preventative, I removed and cleaned it. It was not very dirty, nothing like the pictures posted here.
I haven't gone all the way around and cleaned every wheel sensor yet, since I figured the one that controls the speedo would have been the problem.

Could nasty, dirty, salty roads cause this to happen to a perfectly good sensor?

Thanks
Find all posts by this user
Add Thank You Quote this message in a reply
02-04-2012, 08:20 PM
Post: #12
RE: e46 Wheel speed sensor cleaning
Welcome to the forum Wavey

Well I would think that really dirty roads, like driving on a dirt roads would really cause this kind of thing to happen at a accelerated rate.

Personally I would just clean all of them while I am at it (though I can understand if time is a limiting factor Wink )

So is the problem sorted after to cleaned the sensor?

\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\

/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\

\


\


\\






\\


\
*

*
*
*
*
*
*
*
*
*
*
**
*

**
*
**
**
*
**

***




***


***
******

***********
Find all posts by this user
Add Thank You Quote this message in a reply
02-04-2012, 08:32 PM
Post: #13
RE: e46 Wheel speed sensor cleaning
Nice DIY write up Thumbs

Current: My Showroom 330ci http://www.bmwfanatics.co.za/showthread.php?tid=8737
Some xxx's
'00 330ci Con (39k Km)
'89 325i Cab (70k Km)
'98 Golf Vr6
'06 G5 GTI DSG
'07 G5 GTI DSG
'06 PoloTDI Sportline
'83 Mk1 GTI
'02 PoloPlaya 1.8
'00 Corolla RXi
'01 & '03 Citi Life (Black & Red)
'00 Honda Civic Vtec'
'91 BMW 325 (2.7 Turbo)
Find all posts by this user
Add Thank You Quote this message in a reply
02-04-2012, 10:14 PM
Post: #14
RE: e46 Wheel speed sensor cleaning
These kinds of DIY's should be sticky'd or maybe a reference thread created (also sticky'd) linking through to helpful thread such as above! Idea

BMW E90 330i (M) '05 (His)
BMW E46 320i f/l (M) '03 (Hers)
Isuzu KB300 LX 4x2 DC Dmax (M) '07
ex: Toyota Corolla 160i GLE (M) '99
[Image: BMW_E90_330i_Banner-1.gif]
[Image: 94272.png]
YouTube Vids

...the occupants are not road-worthy...
Find all posts by this user
Add Thank You Quote this message in a reply
03-04-2012, 03:41 AM
Post: #15
RE: e46 Wheel speed sensor cleaning
(02-04-2012 08:20 PM)Sankekur Wrote:  Welcome to the forum Wavey

Well I would think that really dirty roads, like driving on a dirt roads would really cause this kind of thing to happen at a accelerated rate.

Personally I would just clean all of them while I am at it (though I can understand if time is a limiting factor Wink )

So is the problem sorted after to cleaned the sensor?

This only happened to me once, for about 2 miles. AFter shutting down, and starting back up,the lights cleared, and the speedo came back on line. Has been working fine since (10+ days ago). I decided to check the LRear sensor, just to be safe, and found it very clean. This is why I haven't moved on to the other wheels yet.
Am I correct in that it's the LRear sensor that is the Speedo sensor? That's why I started there, since my speedo died, along with the ABS,DSC lights coming on.

Thanks
Find all posts by this user
Add Thank You Quote this message in a reply
03-04-2012, 08:15 AM
Post: #16
RE: e46 Wheel speed sensor cleaning
I cannot say for sure, but from what I have seen is that one of the wheels speed sensor is used for the speedometer and all of them together work with the ABS/DSC (to measure differences in wheel speeds)

\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\

/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\

\


\


\\






\\


\
*

*
*
*
*
*
*
*
*
*
*
**
*

**
*
**
**
*
**

***




***


***
******

***********
Find all posts by this user
Add Thank You Quote this message in a reply
03-04-2012, 10:01 AM (This post was last modified: 03-04-2012 10:02 AM by moranor@axis.)
Post: #17
RE: e46 Wheel speed sensor cleaning
i dont think the rear sensors will be used for the speedo because it will be more accurate to use one of the front ones... they will slip less on the road because they do not receive engine power on the Rwd cars...

if i turn the DTC off the speedo does not move with the RPM if i make some smoke Fencelook

so its ether one of the front sensors or all...

Visit this user's website Find all posts by this user
Add Thank You Quote this message in a reply
03-04-2012, 10:36 AM
Post: #18
RE: e46 Wheel speed sensor cleaning
Very useful thread... Thumbs

[Image: IMG-20120627-00224-1-1-1.jpg]

Current:
2006 BMW 550i M Sport
20" Rezax | Koni FSD | Powerflow exhaust | K & N air filter | CF Roundels | Matt black kidneys | LED interior upgrade | Promotec tuned
BMW Goodbyes:
2005 BMW E90 330i Exclusive | 2002 BMW E46 330i Exclusive (Facelift)

[Image: 134920.png]
Find all posts by this user
Add Thank You Quote this message in a reply
03-04-2012, 01:43 PM
Post: #19
RE: e46 Wheel speed sensor cleaning
(03-04-2012 10:01 AM)moranor@axis Wrote:  i dont think the rear sensors will be used for the speedo because it will be more accurate to use one of the front ones... they will slip less on the road because they do not receive engine power on the Rwd cars...

if i turn the DTC off the speedo does not move with the RPM if i make some smoke Fencelook

so its ether one of the front sensors or all...

I have searched for info on speed sensors at length, on bimmerforums, bimmerfest, E46fanatics..., and all seem to point to the driver's side rear sensor being the speedo controlling sensor. I agree, front would make more sense, esp. in a 2-wheel drive vehicle, but Lrear seems to be the answer.
I'm waiting for a call back from a buddy who has the service manual.

(I just sort of wish mine had looked a little dirtier when I took it out to clean it)
ANd, my 98 328is (e36) will spin the speedo up when I make smokeRollsmile
Find all posts by this user
Add Thank You Quote this message in a reply
03-04-2012, 02:14 PM
Post: #20
RE: e46 Wheel speed sensor cleaning
well i guess seeing as its an open diff the rear left could be spinning slower than the right... i will take more note next time Rollsmile

as far as i know the speed sensor in the e36 is located in the diff so it will spin up the speedo Bluebiggrin


Visit this user's website Find all posts by this user
Add Thank You Quote this message in a reply
Post Reply 




User(s) browsing this thread:
1 Guest(s)

Return to TopReturn to Content