Aug 21, 2020 A new BMW key fob isn't just a good idea when you've just lost a key fob; it can also be worth adding an extra fob to your collection if your family members share your car. Getting a new fob is also a good opportunity to take another look at a few of the BMW key fob features you might have missed, particularly if you're buying for a used car. I have seen a few posts asking how to change the battery in the BMW key fob with comfort access but I have not seen anyone show pictures or an actual guide. I took some pictures of mine when I replaced the battery and did an easy how to guide since I have seen a lot of people asking about how to remove the battery.
The 3-series is one of BMW’s oldest sedans. It has has nearly every major key fob that BMW has produced. The past major internal name models have been the E36, E46, E90, F30. For other models, see the all BMW Key Fob Batteries page.
| Model | Trims | Key Fob Type | SubType | Battery | Buy |
|---|---|---|---|---|---|
| E36 3 Series | 316i, 318i, 318is, 320i, 323i, 325i, 328i, M3, 318tds, 325td, 325tds | U Shaped Key | CR2016 | Check on Amazon | |
| E46 3 Series | 316i, 316ci, 318i, 318ci, 320i, 320ci, 323i, 323ci, 325i, 325ci, 328i, 328ci, 330i, 330ci, M3, 318d, 320d, 320Cd, 330d, 330Cd | Diamond Shaped Key | Requires solder, soldering gun, and rechargeable battery with legs to replace | VL 2020 3v | Check on Amazon |
| E90 3 Series | 316i, 318i, 320i, 320si, 323i, 325i, 328i, 330i, 335i, 335is, M3, M3 GTS, 316d, 318d, 320d, 320d ED, 325d, 330d, 335d | Rectangular Shaped Key | Comfort Access | CR2032 | Check on Amazon |
| E90 3 Series | 316i, 318i, 320i, 320si, 323i, 325i, 328i, 330i, 335i, 335is, M3, M3 GTS, 316d, 318d, 320d, 320d ED, 325d, 330d, 335d | Rectangular Shaped Key | Non Comfort Access. Requires solder, soldering gun, and rechargeable battery with legs to replace | VL 2020 3v | Check on Amazon |
| F30 3 Series | 316i, 318i, 320i, 320i ED, 328i, 330i, 335i, 340i, ActiveHybrid 3, 330e, 316d, 318d, 320d ED, 325d, 328d, 330d, 335d | Trapezoid Shaped Key | CR2450 | Check on Amazon | |
| F31 3 Series | 328i, 320d, 330d, 320i, 316d, 318d | Trapezoid Shaped Key | CR2450 | Check on Amazon | |
| F34 3 Series Gran Turismo | 320i, 328i, 335i, 318d, 320d, 325d | Trapezoid Shaped Key | CR2450 | Check on Amazon |
How to replace the F30 3-Series (2013-2019) key fob battery
This model uses the easy to change BMW Trapezoid Shaped Key. This takes a simple CR2450 coin battery type. You don’t even need any special tools to change this one. Here’s a video showing how to change or replace the battery:
Bmw 335i Key Fob Battery
Watch this video on YouTubeSale
Energizer Lithium Coin Blister Pack Watch/Electronic Batteries, 1 Count (Pack of 2) - Pack of 2 batteries
- Lithium coin batteries for watches and electronic devices
- Has a power of 3 volts
This key is also used in the F31 3 Series 328i, 320d, 330d, 320i, 316d, 318d (2013-present)
and the F34 3 Series Gran Turismo 320i, 328i, 335i, 318d, 320d, 325d (2013-present)
How to replace the E90 3-Series (2006-2012) comfort access key fob battery
Battery: CR2032
Watch this video on YouTube AmazonBasics CR2032 3 Volt Lithium Coin Cell Battery - 4-Pack
- 4-pack of lithium coin cell batteries; CR2032 cell size
- 8-year leak-free shelf life, ideal for watches, calculators, key fobs, Apple TV remotes, and other small electronics
- Replacement for BR2032, DL2032, and ECR2032
How to replace the E90 3-Series (2006-2012) non comfort access rectangular key fob battery
The rectangular remote has a rechargeable VL2020 battery inside that is recharged when the key is in the ignition. It may die eventually though and need to be replaced. To change this non-comfort access battery, pry apart the key and de-solder the two points that connect the battery to the circuit board inside:
Watch this video on YouTube
Buy this battery on Amazon, make sure to get one with 90-degree connection points:
Battery Change Bmw Key Fob
Keyecu VL2020 Remote Key Rechargeable Battery for BMW E46 E60 E92 3 328 330 X5 (90 degree Leg)How To Program A Bmw Key Fob E90
- Battery Model: VL2020
- Please compare the leg position carefully,this battery is 90 degrees leg
- it is a Rechargeable battery
How to replace the E46 3-Series (1998-2005) key fob battery
How To Program Bmw Key Fob E90 Battery Pack
This requires a solder iron, and a VL2020 rechargeable battery to replace this key fob. Also a box cutter or utility knife is handy to cut open the key fob. Watch my video on how to replace the E46 key fob battery:
How To Change Battery In Key Fob
Watch this video on YouTube Keyecu VL2020 Remote Key Rechargeable Battery for BMW E46 E60 E92 3 328 330 X5 (90 degree Leg)
- Battery Model: VL2020
- Please compare the leg position carefully,this battery is 90 degrees leg
- it is a Rechargeable battery