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BMW Pro.
BMW Pro., BMW Technician
Category: BMW
Satisfied Customers: 779
Experience:  9 years main dealer experience.
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1998 528i: 000 miles the air bag warning light came on..cruise control

Resolved Question:

I have a 1998 528i. At 135,000 miles the air bag warning light came on. Shortly thereafter the cruise control stopped working. The on/off switch works, but I can't get it to engage at a specific speed. Now the cruise control doesn't even engage. Also, the steeering wheel controls for the radio have become intermittant. Sounds like some sort of problem in the connections between the steering wheel and the rest of the car. Any ideas? Thank you
Submitted: 6 years ago.
Category: BMW
Expert:  BMW Pro. replied 6 years ago.

Hi,


I think you might have hit the nail on the head there. From what your're saying it sounds like the 'slip ring' behind the steering wheel is faulting. The slip ring allows the electrics of the airbag and multi function steering wheel operate throughout the motion of the steering wheel. Ideally though you'll need to have the fault memory read to confirm this.


The part I have described can be seen as number 3 in this diagram.....


 


http://www.realoem.com/bmw/showparts.do?model=DD63&mospid=47585&btnr=32_0736&hg=32&fg=35


 


 


If you need anymore info please dont hesitate to ask.


 


 


Rich.

Customer: replied 6 years ago.

Rich - How do I access the slip ring to see if it is faulty?

Expert:  BMW Pro. replied 6 years ago.

Hi,


 


You will not be able to tell if it is faulty by looking at it im afraid, it is a long ribbon cable encased in a plastic cassette, it's a non serviceable item.


 


First you have to set the steering straight ahead and remove the airbag on the steering wheel. But before this you must disconnect the battery. There are 2 holes on the rear of the steering wheel with 27 torx screws inside, release these and the airbag will become free and you will be able to disconnect it. The airbag must be placed facing upwards when taken off.


 


There will now be other connectors visible in the centre of the steering wheel, disconnect these. If I remember rightly the bolt holding the steering wheel on is 16mm, release this. Before removing the steering wheel take note of the little score in the centre where the splined shaft is as it needs go back on in exactly the right position.


 


The slip ring will then be visible. Remove the surrounding steering column cowls and you will then be able to access the screws that hold it on. There will be a loom connected to the rear of the slip ring that needs to be disconnected.


 


 


The new slip ring comes set in an installation position so that is why the wheels must be in the straight ahead position. There is also a pin on the slip ring that located into a hole on the reverse of the steering wheel.


 


 


 


Rich.

Customer: replied 6 years ago.

Rich - it sounds like I should take it to the dealership instead of trying to fix myself

Expert:  BMW Pro. replied 6 years ago.
It is possible to fix it at home so long as you have a good knowledge and confidence but ultimately is more easily fixed at a specialist, but not necessarily a dealer. The airbag fault code memory will also need to be cleared after the repair which would require a decent scan tool, plus there's always that added piece of mind.


Rich.
BMW Pro., BMW Technician
Category: BMW
Satisfied Customers: 779
Experience: 9 years main dealer experience.
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