The system is active at speeds above 70 km/h.įrom BMW: "If the DSC system notices that the accelerator pedal is released quickly, the brakes are immediately pretensioned, to shorten the brake apply response time. Part of the Dynamic Stabilty Control system on BMWs is the Brake Readiness system. Issue: During a panic stop or hard brake event, the brake pedal is hard and does not plunge. check.ģ - brake booster: run engine, shut off, pump brake. check.Ģ - check valve: engine on, hold brake, pedal does not rise. I have tried the usual checks for booster leaks:ġ- Brake booster: pump brakes, hold, turn off engine, pedal drops. Coming to a slow gradual stop using light to medium pedal force, pedal effort builds up and is firm and consistent and brake force is good. This only happens when the brakes are stabbed or pushed hard and seems worse when the vehicle has low vacuum (neutral or low RPM).
Worst, there is little brake force and have to smash the pedal to slow down. I've searched for similar comments on other threads, but have not been able to find anything. Looking for help to diagnose a brake issue on my 06 330i manual.
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