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.

How to replace BMW 3 series / M3 fuse box (junction box) and Upgraded B+ power cable recall Wire for B+ Part Number 61-12-9-312-133 from:

This will help you if you need to change the key battery in this type of BMW key. It is a CR2450 battery.Buy your Car Key Battery on Amazon - Click on the fo
BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > e90 wont start, brand new battery
Thought i'd just share a little fix I managed this week. Both key fobs stopped working and they dont allow the battery to be changed so I guessed it was most likely something else. Fuses were checked and all fine. All the reading online pointed to the diversity antenna so whipped off the spoiler. The diversity antenna was spotless and showed to
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
9lbpa.
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    • bmw e91 key battery replacement