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      04-11-2016, 06:09 PM   #1
CT1VZ
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Wheel speed sensors

I have a 2011 X3 F25 2.0D that need to substitute 3 of the 4 wheel speed sensors. In all 3 times have several errors lights on:
4x4 chassis stabilization
drivetrain malfunction
abs
hand brake partialy inoperacional

In the first 2 times have loss of power wich I understand but last week
if I acelerate a litle the motor e / or tansmission vibrate and could not run
the car.

With the 3rd new sensor the X3 is now OK but I am afraid to go to a long trip
and have a similar problem. The dealer only put news sensors and dont know what is causing a vibration in the drivetrain.

Someone had a similar problem?

Thanks.
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      04-17-2016, 05:21 PM   #2
Pinewood
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Either your wheels are way out of balance and causing vibration, or you have something loose/failing whuch is causing the lack of power and various errors on the dash.
I suspect something more than just wheel sensors?
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      04-19-2016, 06:24 PM   #3
CT1VZ
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The vibration was in drivetrain and not in the wheels. Normaly when a wheel sensor (pulse generator) fails there are some errors on the dash and sometimes a lack of power (safe mode). But in my case, in the last time, if I acelerate only a litle the drivetrain vibrates so much. The X3 only could run at
a very very slow speed without any aceleration. Now with the new sensor the X3 is running normally but I dont know when I have a similar problem.
I suspect of a software problem that put the car in safe mode so I put the problem to BMW PORTUGAL and wait a replay.

Many thanks and sorry for my poor english.
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      04-20-2016, 04:12 PM   #4
red30xdrive
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Could be tyres with un equal tread depth ?
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      04-20-2016, 07:10 PM   #5
kevink1
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I had a sensor go bad recently. A bunch of lights came on. Car still ran fine. But cruise control was disabled, and other features like pedestrian collision protection and ABS was disabled.

After years of cruise control, I kept on finding myself speeding on the highway
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      04-21-2016, 06:07 AM   #6
CT1VZ
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red30xdrive

In my case was a bad sensor that counts the velocity of the wheel and such
information is used for many systems (ABS, Xdrive, DSC etc).

kevink1

I suggest to change the bad sensor. In my case in the beginning there was some errors and the X3 runs normally but after some time it have a loss of power and finally could not run . I could not acelerate nothing because
a strange drivetrain appears. The problem with this bad sensors is that the
consequencies are not the same all the time and is this problem I put to BMW.

Thanks.
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      04-21-2016, 06:10 AM   #7
CT1VZ
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correction:



" a strange drivetrain vibration and appears"
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      04-21-2016, 06:32 AM   #8
kevink1
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When I got to my destination, I stopped at the dealership and dropped the car off to get fixed under warranty.

200 miles from home. So I drove a loaner until the car was fixed, then headed back after work during the week to pick up my car.
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