My 2018 330e aux battery also needs replacing: Max eDrive not possible due to a "system request". My local BMW dealer does have the battery, which is nice, but they want $520 plus install $. The same VARTA battery is available for 72 Euro from spareto.com in Europe, I elected to get the BOSCH for 81USD. You can program a key yourself with a special tool. You can have a locksmith program you a new aftermarket key ($100 to $300). You can go to the dealer and have them program a new key ($300 to $500). Replace the battery. If that doesn’t work then your button is damaged and will need to be repaired. Send me a PM. 1PCS VL2020 Battery Fits for bmw key fob. but pls make sure your battery size before you order it ; VL2020 3V 2.0mm*20.0mm / 20mAh ,90° Angle ; This is a replacement part to match the original in form and function ; Notice:Pls make sure your battery size( VL2020) before you order it. Easy installation which does not require reprogramming In this video i have the key fob for a BMW e91 which has stopped working and so I will be replacing the battery in it and see if that helps the fob and works Drives: BMW 335i Coupe. Join Date: Mar 2008. Location: Cincinnati, OH. iTrader: ( 1) Key FOB low battery warning. My car keeps telling me that they Key FOB's battery is low but I've replaced it with a new battery (twice now to see if it would make a difference) and it still says the same thing. 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 guide is here - How to BMW Key Battery Replacement & Transponder RemovalAdd me on instagram @BMWDoctorofficialIf you have found this channel helpful and you have saved money consid How to change or replace a battery on BMW keys? In this case it was a key from BMW 5 E60 / E61 but similar or same procedure can be used on some newer and ol Sometimes batteries just go dead early. The same is true of water pumps, wheel bearings, etc. The car likely receives a "low battery" code from the fob. The fob likely monitors the battery voltage and sends a message when the voltage goes below a certain value. TPMS sensors also send a low battery message to the car Neither of the two key fobs will remotely lock or unlock the car. Standard BMW wiring quality . croselli. 3 posts. 57 months I need help with my 320d e91 . I take of the battery of the car EVcPbEY.