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Left key on will not start

Tiny
WARREN A HARRIS
  • MEMBER
  • 1995 BMW 740
  • 4.0L
  • V8
  • 275,000 MILES
Similar to others, I left the key on in my 740i for a few hours. When I came back, when I tried to start the engine would not crank. No noise from the starter, no clicking. The lights all worked, windows, headlights. I looked at the threads here and tried unlocking withe key fob, locking and unlocking manually, no change. Called BMW they said replace the battery. I did with no change, still won't crank. They said it probably wasn't alarm system but it sure seems like it's locked out for some reason. As I said lights, everything seems ok except engine won't crank. I will check fuses next. Any other ideas?
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Tuesday, January 14th, 2020 AT 12:48 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,702 POSTS
Hello,

When you try and crank the engine over do you have a security light flashing? If so this guide will help you reset the system:

https://www.2carpros.com/articles/how-to-reset-a-security-system

If not can I ask if you jumped the old battery? Lets check the fuses. here is a guide to help:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Please run down these guides and report back.
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Wednesday, January 15th, 2020 AT 1:12 PM

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