The ABS light on the BMW E60/E61 illuminates after replacing the wheel bearings.

[JamesStv]

Greetings, I am experiencing an issue with my 2005 520d Touring vehicle.

I installed two high-quality F.A.G front wheel bearing assemblies, with the component number FAG713667070.

Following the replacement, I encountered error code 49F2, indicating a problem with the wheel speed. Upon resetting the code, the ABS and DTC lights illuminate again when the vehicle exceeds a speed of 5mph.

While replacing the bearing, I suspect that I may have caused damage to the left wheel speed sensor by getting it trapped and pulling on the wire. To rectify this, I replaced it with a Pagid sensor 417110628. This did not resolve the error. I attempted to install the sensor that I had taken out from the left side onto the right wheel, but unfortunately, this did not resolve the issue.

Have I mistakenly placed wheel bearings that are not compatible? Have I damaged two sensors? Did my new sensor arrive in a non-functional state? Given the improbability of all the options, I need some diagnostic suggestions.

Is there a method to inspect the wheel bearing assemblies without the need for their removal? Is there a diagnostic technique using a multimeter to test the sensors? Do you have any more suggestions?

Salutations!

[Cassole]

It should theoretically be possible to attach a multimeter and measure the voltage while rotating the wheel. From my recollection, the measurement on the AC setting is just in millivolts.

[JamesStv]

During the test, I saw voltage readings ranging from 0.04Vac to 0.1Vac while manually spinning the wheels at a high speed. This was done using both the new Pagid sensor on the left and the old BMW sensor on the right.

I have seen many YouTube videos that demonstrate the testing of sensors on different vehicles, and it seems that a voltage reading of less than 0.1Vac is considered to be low.

I am concerned that my new hubs may not be compatible, and I would like not to repeat the task for a third time.

[tr4s]

Insert a diminutive spacer between the sensor bolt and the bolt hole.
If there are no more codes, it indicates that the distance between the sensor and the ring is appropriately or too sensitive.

[JamesStv]

The sensor voltage was decreased to less than 0.02Vac, indicating that the sensor may need closer proximity.

[Cassole]

The hubs seem to be the cause of the problem.

[tr4s]

Simply take a ride and see real-time sensor data with the inserted spacer. This is the optimal method for testing.