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?

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 1,000 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!
  1. Home
  2. Questions
  3. Brake malfunction dynamic drive on 2005 BMW 745Li

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: What does the oil pressure Warning Light mean?

The oil pressure Warning Light is located on the instrument panel. The oil pressure Warning Light will illuminate when oil is not properly flowing into your vehicle’s engine. Usually this means that there is an insufficient amount of oil in...

Q: My front driver's side window is broken

Hello. The window and window regulator would need to be inspected for a broken window regulator or the bottom window bracket came loose from the window and the window needs replaced. Once the door panel is removed the parts can...

Q: Weird smell coming thru a vents

White smoke through the vents can indicate a leaking heater core. Coolant circulates through the heater core which is behind the dash to provide heat. If no coolant leaks are obvious under hood, the heater core may be your culprit....

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...