BMW Key Fob Remote Batteries & How to Replace Them

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. Find videos on how to change the battery for each on the individual car page, or below the table.

  • 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.

PictureKeyYearsBuy Battery
U Shaped Keyearly 90s
BMW Diamond Shape Key Battery Diamond Shape Key90-early 2000sVL2020 Check on Amazon
BMW Rectangular Shape Key (Comfort Access) Battery Rectangular Shape Key (Comfort Access)2000sCR2032 Check on Amazon
BMW Rectangular Shape Key (Non-Comfort Access) Battery Rectangular Shape Key (Non-Comfort Access)2000sVL2020 Check on Amazon
BMW Trapezoid Shape Key BatteryTrapezoid Shape Key2011-2017CR2450 Check on Amazon
Sleek Slant Shaped Key2017-PresentCR2032 Check on Amazon
BMW T Shape Key (Comfort Access) Battery T Shape Key (Comfort Access)2002-2008CR2032 Check on Amazon
BMW T Shape Key (Non-Comfort Access) Battery T Shape Key (Non-Comfort Access)2002-2008VL2020 Check on Amazon
i Key2013-Present
Display Key2016-Present

How to change the battery in the diamond shaped BMW key fob

Buy VL 2020 Replacement Battery on Amazon

How to change the battery in the Rectangular Shape Key (comfort access) BMW key fob

Buy VL 2020 Replacement Battery on Amazon

How to change the battery in the Rectangular Shape Key (non-comfort access) BMW key fob

Buy CR 2032 Replacement Battery on Amazon

How to change the battery in the Trapezoid Shape BMW Key Fob

Buy CR 2450 Replacement Battery on Amazon

How to change the battery in the Sleek Slant Shaped Key BMW key fob

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

Buy CR 2450 Replacement Battery on Amazon

How to change the battery in the T Shape Key (comfort access) BMW key fob

Buy VL 2020 Replacement Battery on Amazon

How to change the battery in the T Shape Key (non-comfort access) BMW key fob

Buy CR 2032 Replacement Battery on Amazon

Frequently Asked Questions

What battery goes in BMW key?

The battery for your key depends on the key fob. But the most common BMW key batteries are 3v coin batteries like the: CR2032, CR2450 and the rechargeable VL2020.

How much does it cost to replace a BMW car key?

BMW car keys must be programmed, this is usually done at a BMW dealership. When I lost a key, it cost roughly $400 to have the dealership program a new key. I had to give them a copy of my drivers license and registration as well. Not cheap.

How do I charge my BMW key?

If you have a key fob with a rechargeable battery, the VL2020, your key will charge when it is placed into the ignition of your BMW vehicle. The VL2020 can eventually go bad, and to replace it you’ll need a soldering kit. Check out one of our videos to see how to replace a rechargeable key battery.

How do you change the battery in a 2011 BMW key fob?

The year isn’t so much as important the type of BMW key fob type. Different vehicles and even the same model will often use multiple or different fob types. See our table above with pictures of every fob type. It’s likely for 2011 you have a CR 2450, but double check above.