Skip to main content

BMW - How to Charge if You Have a Dead Key Fob Battery

This guide provides instructions on how to manually start a BMW that has a dead key fob. 

ESTIMATED TIME 5 min
DIY COST
DIFFICULTY Very Easy

If the batteries in your BMW remote have died, you will not be able to start the car or unlock the doors using the keyless feature.

Symptoms

  • Can't start BMW with key
  • BMW key battery dead can't start the car
  • Comfort Access key does not work

How to Manually Start BMW

  1. Remove the emergency key blade from the key fob.
  2. Unlock the driver's door with the metal blade. (Alarm may go off.)manually start bmw
  3. Place the key into the ignition slot.manually start bmwIf your BMW doesn't have an ignition slot place the keyfob (not the metal blade) next to the right of the steering column. Note the key symbol on the steering column.bmw manual start dead battery
  4. Press the brake pedal and hold it pressed. If your BMW has a manual transmission, make sure to press the clutch. Press the Stop/Stransmission, make sure to press the clutch. Press the Stop/Start button.start bmw dead key or battery

If your BMW doesn't start, it means the key wasn't recognized.

A check control message may appear on the dashboard stating the key was not recognized. Your key may be defective, or the ignition module has a problem.

Try the procedure one more time, ensuring there is no more than a two-second delay between steps.

Also, try the same procedure with a spare key.

Tips

  • Radio transmission can interfere with the frequency of the BMW key. Also, electronic devices in your pocket or charging in the car can cause interference with the keyless key fob.
  • Use a BMW diagnostic scanner capable of reading BMW-specific fault codes to read DME fault codes via the OBD2 port located under the dashboard.

Follow the instructions in this guide to learn how to start your BMW manually.

This guide will assist you if the key fob batteries have died or the key fob is not working.

If the main BMW battery has died, follow this guide to get into the car, then follow the instructions on this guide to jump-start a BMW with a dead car battery.

Vehicle