Some 2012 BMW 128i vehicles may experience a rubbing and/or scraping noise at the steering column. The noise may occur when turning the steering wheel from left to right. While there are a number of components which can cause this type of noise, this bulletin is specifically related to those noises which can occur directly at the steering shaft.
The noise can be caused by contact between the pinion shaft dust cover and the steering gear and/or insufficient lubrication of the bulkhead seal for the steering shaft.
Isolate the source of the noise using a stethoscope or other suitable listening device. If the noise is coming from the steering shaft, then the pinion shaft dust cover should be checked and the steering shaft seal should be lubricated.
- Using a pry bar, push up slightly on the pinion shaft dust cover while someone turns the steering wheel. If the noise changes or is eliminated, proceed to Step 2. If the noise does not change, proceed to Step 5.
- Loosen the securing bolt on the steering coupler.
- Push the dust cap up to eliminate contact between the cap and steering gear.
- Refer to the tightening torque section of the repair manual for torque valued and requirements for bolt replacement.
- Lubricate the steering shaft slip ring by spraying Wurthreg Multi Lube 350 onto the steering shaft from the engine compartment side. Turn the steering wheel from left to right to distribute the lubricant. It is not necessary to remove the steering shaft.
- Remove the trim panel above the brake and accelerator pedals.
- Lubricate the steering shaft slip ring by spraying Wurthreg Multi Lube 350 onto the steering shaft from the passenger compartment side. Turn the steering wheel left to right to distribute the lubricant.
- Refit the trim panel.