[wfo777]

2011 328 Xi
Car wouldn’t start ,so I jumped it. After it started the lights ,side marker and windows didn’t work . From what I understand that’s the FRM module problem .
When I change the battery will I still have that issue ? Could the low battery voltage and starting it blow the FRM?
Thx for any input.

[s_napster]

Originally Posted by wfo777

2011 328 Xi
Car wouldn’t start ,so I jumped it. After it started the lights ,side marker and windows didn’t work . From what I understand that’s the FRM module problem .
When I change the battery will I still have that issue ? Could the low battery voltage and starting it blow the FRM?
Thx for any input.

from my experience yes. I had a dying battery. if the car sat for more than 24h it would need jumping. then frm started acting up, a week later it got fried and could not lock the car. had to replace battery, frm, fuel door lock since it got fried too, and coding. expect to be charged anywhere from 4k and up for all of that. I fixed it myself with a help of a friend.

[ian3924]

Hey how are you guys preventing your FRM from bricking when disconnecting the battery for maintenance? I know theres a recall but its happened to me twice already and I really couldnt be bothered to wait for an appointment through bmw and have been taking it out and bringing it to a local guy to do a eeprom reflash or whatever. Im looking for prevention methods and ordered this cable to give it a try. What do you guys use?

https://www.amazon.com/gp/aw/d/B01MP...b_b_asin_title

[RealJ22]

Originally Posted by ian3924

Hey how are you guys preventing your FRM from bricking when disconnecting the battery for maintenance? I know theres a recall but its happened to me twice already and I really couldnt be bothered to wait for an appointment through bmw and have been taking it out and bringing it to a local guy to do a eeprom reflash or whatever. Im looking for prevention methods and ordered this cable to give it a try. What do you guys use?

https://www.amazon.com/gp/aw/d/B01MP...b_b_asin_title

Did not know this was a problem. So leaving it without power for an extended time is not good? Any more information on this?

[ian3924]

Originally Posted by RealJ22

Did not know this was a problem. So leaving it without power for an extended time is not good? Any more information on this?

As far as I know it only affects vehicles equipped with the FRM3. Leaving it without power is fine but to my knowledge the problem comes from voltage changes (disconnecting/reconnecting battery terminals or jump starting) which can lead to 2 problems.

1. Short circuit counter reached X amount and has to be reset via tool32

2. The frm dump file has become corrupt and the frm must be removed and the EEPROM chip must be bench flashed using programs and coding I have no knowledge how to use.

You can read more about it here the first link talks about the easier problem to fix (tool 32 SCC reset) and the second is how to do the eeprom bench flash

https://bimmerscan.com/bmw-footwell-module-frm/
https://carscanners.net/how-to-repair-bmw-frm-module/