Skip the auto shop - Our mechanics make house calls

Q: Brake malfunction dynamic drive on 2005 BMW 745Li

asked by on

My BMW went ballistic on me today! I was calmly driving down the road when immediately the air conditioner was turning on and off, and I got messages on my dashboard that said, “Brake Malfunction Dynamic Drive.” Do you have any idea what happened? Do you know how to fix this?

A: Hello. It sounds like your 2005 BMW 745Li m...

Hello. It sounds like your 2005 BMW 745Li may have a problem with your electric/charging system or that the battery is faulty. If the electric/charging system is charging too low, it will cause the electronics to go “haywire” because the necessary voltage isn’t available to power all the systems in the car.

The alternator is vital to your car as it takes over for the battery once the car is started and powers everything in your car that uses electricity after that. If the alternator is faulty it may cause the car to do some crazy things. Have a certified technician, like one from YourMechanic, inspect your electric/charging system in order to properly diagnose your problem and complete the necessary repair.

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: What does the tire pressure Warning Light mean?

The tire pressure Warning Light is located on your instrument panel. When the tire pressure monitor system (TPMS) detects that one or more of your tires has insufficient air pressure, the tire pressure Warning Light will illuminate. If this is...

Q: My car key won't turn in the ignition

A number of things can make the ignition difficult or impossible to turn. A faulty ignition switch or ignition tumbler may not signal the shifter interlock properly, preventing the ignition from turning. Also, a damaged,loose, or misadjusted shifter mechanism can...

Q: AC blower broken

The most common problem for your blower not working on this car is the blower motor has gone bad. A certified technician can come and perform some electrical test to determine if a replacement blower motor is needed.

Related articles

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 to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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.