BMW 6 Series key fob battery
3 of the 14 model years listed for the BMW 6 Series have a proven battery. The most common answer is CR2032. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.
- 2004-2007Key-head remote
Not confirmed yet
- 2004-2005Smart key
Not confirmed yet
- 2006-2007Smart key
Not confirmed yet
- 2008-2010Key-head remote
Not confirmed yet
- 2008-2010Smart key
CR2032
FCC ID KR55WK49147Two sites agree: americankeysupply.com and bestkeysupply.com (checked Nov 1, 2026)
Find CR2032 on Amazon - 2012-2018Smart key
Not confirmed yet
Changing the battery
Smart key (push-button start)
- Start by freeing the hidden metal key: there is a latch or slide on the case, and the blade comes out once it moves.
- Use the slot where the metal key sat. Twist, do not lever hard, and work along the seam until the halves separate.
- Before you take the old cell out, look at its face. Put the new cell in with the same side showing, and avoid touching both faces at once.
- Reassemble, refit the emergency key, and check that the car sees the fob when you press start.
A CR2032 is 20 mm across and 3.2 mm thick. CR2032, CR2025 and CR2016 share the same width but not the same thickness, so a swap between them can leave a loose contact or a case that will not close.
Coin cells are a choking and burn hazard for children. Store the spares in their original pack, out of reach.