Frm battery question

SmoukeyDoukey · 02-07-2025, 02:52 PM

I want to replace my FRM module on my BMW e93 LCI
I was wondering what to do about the battery?

Should I disconnect it before taking out the FRM and if yes then for how long? (I gotta send the FRM to get programmed) Should I reconnect the battery back after taking out the FRM?

codeterrorist · 02-08-2025, 10:27 PM

I would say yes, disconnect before removing the FRM. If you connect the battery back without an FRM connected; you will get errors.

Not sure if they will clear up once you have an FRM installed. So it's better if you have a way to clear codes. If you don't need to drive the car while the FRM is out; then keep the battery disconnected.

02-07-2025, 02:52 PM	#1
SmoukeyDoukey Registered 0 Rep 1 Posts Drives: E93 N47D20C 2011 Join Date: Sep 2024 Location: Slovakia iTrader: (0)	Frm battery question I want to replace my FRM module on my BMW e93 LCI I was wondering what to do about the battery? Should I disconnect it before taking out the FRM and if yes then for how long? (I gotta send the FRM to get programmed) Should I reconnect the battery back after taking out the FRM?
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02-08-2025, 10:27 PM	#2
codeterrorist Second Lieutenant 226 Rep 226 Posts Drives: 328i Join Date: May 2020 Location: Earth iTrader: (0)	I would say yes, disconnect before removing the FRM. If you connect the battery back without an FRM connected; you will get errors. Not sure if they will clear up once you have an FRM installed. So it's better if you have a way to clear codes. If you don't need to drive the car while the FRM is out; then keep the battery disconnected.
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