Skip the auto shop - Our mechanics make house calls

Q: Car would not stop at red light - 2006 BMW 528xi

asked by on

When I started stopping at a red light, I had a frightening thing happen. The car wouldn't slow down! I had to press down on the brake pedal with both feet to get my car to come to a stop. There were no warning signs and no warning lights came on. This problem keeps happening on an intermittent basis. I went to an independent mechanic and he told me that the problem is the brake vacuum pump. Before I have him replace it, would you please give me your diagnosis and solution for my car?

A: Yes, this is a possibility. Due to engine o...

Yes, this is a possibility. Due to engine on this BMW having variable valve lift engine vacuum not always present, a vacuum pump is installed to supply sufficient vacuum to run auxiliary systems such as the brake booster. The vacuum pump system needs to be checked to ensure if sufficient vacuum is being produced by the pump and the system integrity should be checked as well. You may want to enlist the help of a certified mechanic, such as one from YourMechanic, who can check and access the vacuum pump to properly diagnose the brake issue and have this resolved.

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・Save up to 30%

Get a quote

What others are asking

Q: Can a bad bearing mess up the brakes and rotors in the front?

If the wheel bearing is defective, that will not damage the brake rotor or the brake assembly. However, when installing the new bearing, the factory procedure must be carefully adhered to. In particular, the hub retaining nut has to be...

Q: The undercarriage plastic that keeps the bottom of the car protected has lowered(the front end dragging)

Hello. If you had jammed the broom under the vehicle then it more than likely warped the plate. When this occurs in some cases the cover can be removed and then straightened and reinstalled. Most of the time though once...

Q: Car is losing coolant

Hi, it is possible for leaks to occur around the cylinders so that coolant gets into the combustion chamber and burns with the fuel and air. Liquid doesn't compress at all, so if too much gets into the cylinders, you...

Related articles

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...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.