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

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: Car won't start

The charging system is not recharging the battery. This is why warning lights are on the dash and the vehicle loses power. It will jump start and run until the battery runs out of juice. The most common problem...

Q: When putting foot on accelerator, brake, or shifter, car dies

There are some technical bulletins for replacing the ECU on your 2005 Kia Amanti for drivability problems. With what you said, what they want to do is along these lines. They may be able to reprogram the computer or need...

Q: How does semi-automatic climate control work?

If your vehicle is equipped with automatic climate control, you can switch the system to semi-automatic operation if you want. This gives you more control over certain aspects of the system, but it means that it won’t be completely automatic....

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...