What is the reason for the limited chassis function of the BMW 7 Series without affecting driving?
2 Answers
The reasons for the limited chassis function of the BMW 7 Series without affecting driving are as follows: Height sensor damage or failure: Air shock absorber damage or air leakage; air compressor damage. VDP control program failure: Accumulator damage or air leakage; air distribution valve damage or sticking; circuit failure between air suspension components; air pipeline leakage. Fault phenomenon: The right rear air suspension occasionally sinks when driving on bumpy roads, and the CID prompts that driving can continue. The chassis function is limited. When normal, the vehicle is parked for a day, the rear suspension does not sink, the left and right heights are normal, and the air suspension does not leak. It is difficult to reproduce the fault, and the fault can only be reproduced through road testing.
As a BMW 7 Series owner, I've encountered similar issues. When chassis functions are restricted but still drivable, it's usually due to minor faults in the electronic control system - like sensors or control modules in the air suspension. BMW's active chassis system is quite complex; once sensors send false signals, the system automatically enters protection mode, prioritizing basic driving functions. These inaccurate signals might be caused by loose wiring or software updates. Driving long-term with this issue affects suspension adjustment, reducing comfort when going over bumps - you'll need to visit the dealership for diagnostic scans and repairs. Simply put, it's like a smartphone occasionally lagging but not crashing - doesn't affect basic calling. No need to worry about safety, but prompt maintenance prevents bigger issues. These BMW systems are expensive - delaying repairs might cost more later.
