BMW Model Discussions. 3 Series & 4 Series. E90/E91/E92/E93 (2006 - 2013) Key Battery. Jump to Latest Follow Door Lock Actuator Set - E9X E60 E70 E71 E82 & More - 51217263086. Genuine BMW # 51217263086, includes a left actuator (51217202143) and a right (51217202144) for a proper repair. This part is listed by BMW as BMW part number 51217263086 (51 21 7 263 086) and is described as Genuine BMW Set, System Lock. This package includes one left side BMW Key Battery Replacement & Transponder RemovalAdd me on instagram @BMWDoctorofficialIf you have found this channel helpful and you have saved money consid So to repair no problem just a new housing. The solution is to put the fob in the ignition and drive the car. If it doesn't hold a charge after, then you need to replace the battery; not try to rig some external charging system. The solution is to put the fob in the ignition and drive the car. I have a similar problem to that defined in this old thread. Water in the battery well corroded the positive terminal. (There is only one in my car - bmw 318i E90 N43 Saloon 2.0l Registered 2009.) 2009 E91 328xi Water in Battery Tray / Start Issues key battery replacement. Bimmerpost ☰ Model Selection. 1. F40Model Year: 2019 + Previous Generations E90 / E91 / E92 / E93Model Year: 2006 - 2011. 4. G22Model Garage List. 2023 M2 Coupe [9.83] 2020 Mercedes GLE 450 [4.50] Nonrechargeable battery. Quote: Originally Posted by M3Dreamer. I have just started getting the low-battery warning for my primary key fob, did a search here and saw that the battery inside the fob in a comfort access car apparently is not rechargeable. The Battery Tender is throwing a red light, current voltage is 7.86V, so I jumped it to my truck's battery. Battery Tender is still throwing a red light, but the voltage is going up, 11.79 to 11.85 over the course of a few minutes. After 20 minutes, it's at 11.91 with my truck battery jumped to the BMW. UKjfcg.