The German car giant loves it’s key fobs to start it’s cars. It’s been doing keyless start and entry for 20+ years. BMW key fob batteries need replacement every 3-5 years depending on usage. I got 5 years from my first battery for my X3 before needing to replace it.
Sedan Models
SUV / X-Series Models
Key Fob Remotes
BMW has made about 10 different types of key fobs over the years.
- U Shaped Key
- Diamond Shape Key – Battery: VL2020
- Rectangular Shape Key (comfort access) – Battery: CR2032
- Rectangular Shape Key (non-comfort access) – Battery: VL2020
- Trapezoid Shape Key – Battery: CR2450
- Sleek Slant Shaped Key – Battery: CR2032
- T Shape Key (comfort access) – Battery: CR2032
- T Shape Key (non-comfort access) – Battery: VL2020
- i Key
- Display Key
I created a guide to show how to change the battery in BMW comfort access key remotes vs non-comfort access fobs.
| Picture | Key | Years | Buy Battery |
|---|---|---|---|
| U Shaped Key | early 90s | ||
 | Diamond Shape Key | 90-early 2000s | VL2020 Check on Amazon |
 | Rectangular Shape Key (Comfort Access) | 2000s | CR2032 Check on Amazon |
| | Rectangular Shape Key (Non-Comfort Access) | 2000s | VL2020 Check on Amazon |
 | Trapezoid Shape Key | 2011-2017 | CR2450 Check on Amazon |
 | Sleek Slant Shaped Key | 2017-Present | CR2032 Check on Amazon |
 | T Shape Key (Comfort Access) | 2002-2008 | CR2032 Check on Amazon |
 | T Shape Key (Non-Comfort Access) | 2002-2008 | VL2020 Check on Amazon |
| i Key | 2013-Present | ||
| Display Key | 2016-Present |
Sleek Slant Shaped Key
This BMW Key Fob and Battery were popular in 2011, 2012, 2013, 2014, 2015, 2016, 2017 F-Series Models like the 3, 5, 7 series and the X3.
Battery: CR2032