Skip the auto shop - Our mechanics make house calls

Q: Brake locking - 1990 BMW 750iL

asked by on

I have major problem with the brakes on my car which get locked up when applied. I tried to troubleshoot the issue by replacing the brake pads, rotors, front calipers and hoses but this hasn't helped at all. What else might help?

Your vehicle uses a high-pressure hydraulic brake booster. It’s likely that the pressure regulator sensors that provide the braking assistance are not functioning correctly, providing too much "braking assistance". A professional mechanic, like YourMechanic, can assist with diagnosis of your braking system, and make the necessary repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Engine whines, knocks, and has slow acceleration

Hey there. I would suggest you have a mechanic come and listen to the noise and verify the noise you hear. The engine may be making normal noises. You may be hearing the idle control and air pump noises that...

Q: Installed new front calipers on my car and they keep sticking

Check to be sure the mounting bracket (torque plate) for each caliper is not bent and that the sliding bushings/pins on the caliper/torque plate assembly are free and move easily. If you have rear drum brakes, there is a metering...

Q: Battery discharging while stopped, electrical devices were temporarily switched off.

The first thing to do with a draw is to check and make sure nothing is on that can be turned on by a human. Some common sources are interior lights, exterior lights, after market stereo systems or other after...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.