Is your key's battery dead and not charging in the ignition?
How to Recharge Your BMW Remote Key - BMW Inductive Battery Charging – Bimmernav Online Store
HQRP Battery for 3-series BMW E46 E90 E91 E92 E93 LX8 FZV LX8FZV Key Fob 90 Degrees Pins - Walmart.com
Battery replacement service for BMW E46 3 E60 5 X5 E53 3 button remote key 2020 8945049474721 | eBay
Ml2020 Battery With 90 Degree Solder Tabs Fit For Bmw Car Key Fob E46 E60 E90 Key Fobs - Buy Battery For Bmw Key,Ml2020,Ml2020 Battery Product on Alibaba.com
Bimmerforums - The Ultimate BMW Forum
10pcs/lot Lir2025 Replacement Battery For Bmw E46 E39 X3 X5 E46 E38 E39 Remote Key Fob Auto Remote Keys Battery 3.6v - Diagnostic Tools - AliExpress