BMW 3 Series key fob battery
GarageDex's key fob data shows the 2013 to 2019 BMW 3 Series takes a CR2450 coin cell. Earlier or other fob styles use CR2032 or VL2020, so match your year and fob type in the table.
Shop CR2450 batteries A 2-pack covers both fobs
Key takeaways
- 2013 to 2019 BMW 3 Series: CR2450.
- CR2450: 24.5 mm wide, 5 mm thick - common in BMW and newer smart keys.
- This model used different cells over its life (CR2450, CR2032, VL2020) - use your year's row.
- Note which side faces up before removing the old cell.
| Years | Fob type | Battery | Notes |
|---|---|---|---|
| 2013 to 2019 | Standard fob | CR2450 | 24.5 mm wide, 5 mm thick - common in BMW and newer smart keys |
| 2006 to 2012 | E90 C-Access | CR2032 | 20 mm wide, 3.2 mm thick - the most common fob cell |
| 2006 to 2012 | E90 No-C-Access | VL2020 | Requires Soldering |
How to change the BMW 3 Series fob battery
- Slide out the mechanical key if the fob has one, and look for a slot or notch along the seam.
- Twist a coin or a small flat screwdriver in the slot to split the case. Work around the seam rather than forcing one point.
- Note which side of the old cell faces up, then lift it out with a fingernail or plastic pick - avoid metal tools across the contacts.
- Fit the new CR2450 the same way up, snap the halves together, and test the lock button before walking away from the car.
Batteries and tools for the BMW 3 Series fob
Coin cells are universal - any brand's CR2450 fits. Buy a multi-pack so the second fob gets a fresh cell too.
CR2450 batteriesName-brand multi-pack, check the date codeShop batteries Plastic pry toolOpens the case without scratching itShop tools Fob coverSilicone case filtered to the BMW 3 SeriesShop covers
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Same car, other specs: BMW 3 Series specs hub and 12V battery size.
Other BMW models
Source: Microbattery - Key Fob Battery Finder. Fob designs change mid-generation, so confirm the code printed on the cell you take out before you order.