Speed sensor issue

YANNICK SIDOT

MEMBER
2006 BMW X3
3.0L
6 CYL
TURBO
4WD
AUTOMATIC
190,000 MILES

Hello,
I had my e83 brake, 4WD and tire-pressure light orange, day after a big storm. I used a friend's diagnostic BMW computer and it said front left "speed sensor" issue.

I ordered one and replaced it. Then all light shut down and now as I drive few meters then light up again until I shut the car off. When I cycle the key there nothing and when I drive a bit it comes again.

I replaced the right speed sensor to see and then.

I ordered an icarsoft 910 diagnostic case and it says "left speed sensor air gap" and same fault ont right.

I imagine there is plug-in problem or the reluctor is bad or I have something to do with the speed sensor to make it work again, as you wrote :

Curve ball: Honda, Acura and BMW
On some newer vehicles, when the sensor is unplugged, the power or bias is turned off. If the sensor was plugged in and the key was cycled, it would appear again. In these cases, back probing the sensor would be the best way to test the sensor."

Can you help me please?

4 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,940 POSTS

Hello,

I would test the sensor manually to see if it is a sensor problem or a computer error.

Here is a guide to give you an idea how to test the sensor.

https://www.2carpros.com/articles/abs-wheel-speed-sensor-test

Please run this test and get back to us so we can continue helping you.

Best, Ken

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Saturday, April 8th, 2017 AT 11:55 AM

KEN L

MASTER CERTIFIED MECHANIC
42,940 POSTS

Hello again Yannick

If the air gap is too much check the axle bearing to see if the wheel is loose. If that's okay here is a wiring diagram and a guide so you can check the system.

https://www.2carpros.com/articles/how-to-check-wiring

Please run some tests and get back to us so we can continue helping you.

Best, Ken

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