Replace key battery

kareemab24 · 05-19-2026, 01:37 PM

I bought my car in october and it started not unlocking when i click the button and it takes a few tries no matter how close or far away I am. I think I might need to replace the battery on my key fob. The thing is my 328i doesnt have the comfort access package but my key fob is a comfort access fob. It is also the only key I have. If I get a spare, should I get the regular key fob?

ctuna · 05-22-2026, 11:30 PM

You can get the CR2032 battery's dirt cheap on Amazon.
If the remote functions work on it you might as well keep it
way easier to change the battery on the Comfort Access key's

Bac · 05-23-2026, 10:20 AM

If the CR2032 appears a bit weak, you can try 2x CR2016 and a thin bit of paper.

05-19-2026, 01:37 PM	#1
kareemab24 Registered 0 Rep 2 Posts Drives: 2011 BMW 328i N52 engine Join Date: Jan 2026 Location: South Florida iTrader: (0)	Replace key battery I bought my car in october and it started not unlocking when i click the button and it takes a few tries no matter how close or far away I am. I think I might need to replace the battery on my key fob. The thing is my 328i doesnt have the comfort access package but my key fob is a comfort access fob. It is also the only key I have. If I get a spare, should I get the regular key fob?
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05-22-2026, 11:30 PM	#2
ctuna Lieutenant General 2452 Rep 14,108 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	You can get the CR2032 battery's dirt cheap on Amazon. If the remote functions work on it you might as well keep it way easier to change the battery on the Comfort Access key's
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05-23-2026, 10:20 AM	#3
Bac New Member 18 Rep 24 Posts Drives: E90 325i '05 Join Date: Jan 2026 Location: Poland iTrader: (0) Garage List 2005 BMW 325i E90 [0.00]	If the CR2032 appears a bit weak, you can try 2x CR2016 and a thin bit of paper.
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