These instructions apply to the BMW X5 Mk3 (F15/F85) 2013-2019.
For other models, please choose your vehicle here.
A weak remote or “key battery low” message on the BMW X5 (F15, 2013–2019) usually just needs a fresh CR2450 coin cell — unless you have the optional touchscreen Display Key, which is rechargeable.
How to Replace the X5 (F15) Key Fob Battery
- Press the release and slide out the metal emergency key blade from the fob.
- Remove the key-blade cover / open the fob case at the seam.
- Lift out the old CR2450 coin cell.
- Fit the new cell with the positive (+) side facing up, as the old one sat.
- Close the cover and slide the emergency key back in, then check the remote works.
If You Have the Display Key
The optional BMW Display Key (small touchscreen fob) is rechargeable — there’s no coin cell to change. Charge it with the supplied USB/charging pad or by placing it on the wireless charging tray where fitted. If it goes flat, use the standard fob or the emergency blade.
Frequently Asked Questions
What battery does the BMW X5 F15 key take?
The standard remote uses a CR2450 3V coin cell, fitted positive-side up. The optional Display Key is rechargeable, with no replaceable battery.
Do I need to reprogram the key after changing the battery?
No — a battery swap doesn’t affect programming. A lost or replacement key must be ordered from a dealer and coded with a diagnostic tool.
Remote still dead with a new battery?
Use the emergency blade to unlock, then hold the fob against the start button to start, and have the key checked.
For a related key or immobilizer code, see autodtcs.com.
Independent guide — not affiliated with BMW. Always follow your official service manual and safety precautions. Read our full disclaimer.