How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Matt Your Own Question
Matt
Matt, Mechanical Engineer
Category: BMW
Satisfied Customers: 21623
Experience:  BEng hons Mech engineering, in auto industry 22 years
12772297
Type Your BMW Question Here...
Matt is online now

I have a warning light at start-up on my 735li saying

Customer Question

i have a warning light at start-up on my 735li saying dynamic drive inactive, is this just likely to be a case of topping up some fluid or worse?
Submitted: 11 months ago.
Category: BMW
Expert:  Shantal-Mod replied 11 months ago.
Hello,
I'm Shantal and I'm a moderator for this topic.
I've been working hard to find a Professional to assist you with your question, but sometimes finding the right Professional can take a little longer than expected.
I was checking to see if you had already found your answer or if you still need assistance from one of the Professionals.
Please let me know if you wish to continue waiting or if you would like for us to close your question?
Thank you,
Shantal
Expert:  Matt replied 11 months ago.

Hello

its worth checking the car fluid levels, oil, coolant, brake fluid and power steering

but this can also be faulty steering angle sensor, and an alternator failing which causes overvoltage in the system. The ARS (dynamic drive) module always stores an overvoltage fault if this is the case.

The only accurate way to diagnose is with a bmw specific scan tool, this will be needed to read the fault codes, from there the faulty component can be determined and replaced.

and if you've fitted different sized wheels and / or tyres then this too can create this fault

Expert:  Matt replied 11 months ago.

Hi

do you still need help?

Bear in mind that the site takes a deposit from you at the beginning and this is held by the site until you rate my answer at which point the cash is split between the site and the expert. I am only paid for my work on this question if you rate my answer, using the star system at the top of the screen. Please do not forget! Thank you

Related BMW Questions