The brakes locked up and we discovered that the brake pedal was not fully returning so it was acting like I was still pressing the brake pedal so the car would stop while trying to drive. We have done lubrication and replaced the brake booster. The brake pedal is still not returning please help not sure what to do now
Indicates a brake master cylinder internal failure
take it to a brake specialist shop for a proper diagnosis
If the brake system has not seen a service or component for the past 5 years , a replacement master cylinder is the professional fix
SOURCE: I have a 2002 745Li
Hi,
If you are "stuck in the Mountains", then it would be relatively dangerous to go back down if the vehicle's computer senses any malfunction in the braking system. Even your emergency brakes are also giving a warning. Since your vehicle is experiencing multiple malfunctions, either the sensors are reading wrong inputs, there is something really big wrong with the car or the car's computer is having a glitch. If even after performing the below listed steps and the warnings are still there and/or you are not comfortable with the brakes, then it perhaps would be wise to seek qualified professional assistance and consider alternative ways of going back down.
In most cars, the on board computer could be reset by removing the negative terminal of the battery. Some requires that this be done with the ignition turned ON but engine not running. Likewise, there are some car stereos that will go into protective mode (security lock) when the battery terminals are removed and would require a "code".
On the brake, pls look under your vehicle, there could be sensors that were disconnected. For the brakes, they would normally be at the back of each wheel. Additonally, parking brake lights would also come on if the brake fluid level is below minimum or if the brake pads have reached a pre-determined level of thickness (or thinness in this case).
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
Good luck and kind regards.
Thank you for using FixYa.
SOURCE: Clutch pedal drops when I apply brake, so can't change gears
I suppose your clutch master or slave cylinder is leaking. You must keep an eye on the brake flui leven and drive to a workshop for a check asap. You can use DOT3 brake fluid.
SOURCE: 318is with NO brakes
What about the brake lines? They could have a tiny hole somewhere letting air in (or just have air in them).
SOURCE: hi.. i have a bmw 850i year 1994 ...my bmw 850i
sounds like an abs control problem if i am understanding you correctly
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