The BMW X3 has had 4 key fob variants over the years. The Diamond Shape Key, the Trapezoid Shape Key, and the Sleek Slant Shape Key. Some early models using the Diamond Shape require a more difficult replacement process, but newer models you can easily pop the battery right out to replace. To view battery replacements fo all BMW models, check out the BMW Key Battery Page here.
|Model||Trims||Years||Fob Type||Rechargeable? Ease of change||Battery||Buy|
|E83 X3||2.0i, 2.5i, 2.5si/ xDrive25i, 3.0i, 3.0si/ xDrive30i, xDrive18d, 2.0d/ xDrive20d, 3.0d/ xDrive30d, 3.0sd/ xDrive35d||2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010||Diamond Shaped Key||Yes, Requires solder, soldering gun, and rechargeable battery with legs to replace||VL2020 3v||Check on Amazon|
|F25 X3||xDrive20i, xDrive28i (3.0), xDrive28i (2.0T), xDrive35i, sDrive18d, xDrive20d, xDrive30d, xDrive35d||2011, 2012, 2013, 2014, 2015, 2016, 2017||Trapezoid Shaped Key||No. Easy to change battery||CR2450||Check on Amazon|
|F25 X3||xDrive20i, xDrive28i (3.0), xDrive28i (2.0T), xDrive35i, sDrive18d, xDrive20d, xDrive30d, xDrive35d||2014, 2015, 2016, 2017||Sleek Slant Shaped Key||No. Easy to change battery||CR2032||Check on Amazon|
|G01 X3||xDrive20i, xDrive30i, M40i, xDrive20d, xDrive30d, M40d||2018, 2019||Sleek Slant Shaped Key||No. Easy to change battery||CR2032||Check on Amazon|
|G01 X3||xDrive20i, xDrive30i, M40i, xDrive20d, xDrive30d, M40d||2018, 2019||Display Key||Yes. But larger li-ion battery not available yet||3.7 V, li ion rechargeable polymer battery 1.97 Wh, 535 mah|
This is my main car! This is the first key fob video I ever made here It uses the CR 2450 coin battery. It shows how to replace the key fob battery for the BMW X3 2011, 2012, 2013, 2014 Models for the Trapezoid Shaped Key:This is the battery for this X3 key fob:
The later year models of the F25 x3 use the newer Sleek Slant Shaped Key. This is a similar back to the Trapezoid model, however the battery is different. It requires at CR2032 battery.
This is the battery for this X3 sleek key fob:
Fob Type: Sleek Slant Shaped
The E83 X3 model uses and older Diamond Key shape that contains a rechargeable battery. This is more complicated to replace as the battery must be removed with a soldering gun, and a new battery with the legs re-soldered on. It can be done in about 15-20 minutes and the battery itself is cheap. This video is for the 3-series, but it’s the same fob.
This is the rechargeable battery for this X3 diamond key fob:
Battery: VL2020 3vFob Type: Diamond Key
Fob Type: Sleek Slant Shaped
The newest G01 model has two key variants, the Sleek Slant Shaped Key introduced in 2014 and the new display key, which is a mini computer on the key fob itself. The Display Key isn’t replaceable yet, and it’s a rechargeable battery that sits in your middle console to recharge wirelessly.
For the Sleek Slant Shape Key, it is very similar to the Trapezoid Shape Key where the back pops off and you can easily pop in a new battery, just a slightly smaller CR2032 battery is needed.This is the battery for this X3 key fob: