Keysolved

BMW 520 key battery

Every BMW 520 remote key we cover, 2010–2017, takes one CR2450.

F10

2010–2017
How to change a smart key battery
  1. Slide the release catch and pull out the emergency key blade.
  2. Wrap the tip of a small flat screwdriver in tape or a cloth, put it in the slot the blade leaves and twist gently to part the case. Keep it off the circuit board and contacts.
  3. Note which way up the old cell sits before you lift it out. It varies by key, so don't assume + is up.
  4. Fit a new CR2450 the same way up, holding it by the edges. Leave any grease on the contacts.
  5. Clip the case back together and test the buttons at the car. Most keys work straight away with no reprogramming.
  6. Keep new and old cells away from children. A swallowed button battery can cause serious injury within two hours.
Full 520 F10 key record

For locksmiths · F10

  • KeysSmart key
  • Tools confirmed33
  • Transponder chipSubscribers
  • Programming procedureSubscribers
Subscribe for the full recordFull 520 F10 key record

Questions

BMW 520 key battery questions

F10 (2010–2017): CR2450 in the smart key.

Also on Keysolved