[BM3Rrrr]

I was doing some maintenance on the car this weekend and disconnected the battery, once the work was done i reconnected the battery and had a code pop up (CDAB). I noticed the windows were no longer working, dash lights wont turn on, turn signals, angel eyes and a few other things weren't functioning. I researched the code and found it to be a fault with the module, likely caused by the battery being disconnected.

My question is can it be re-coded or does it need to be replaced?
From what i can gather the FRM3 can be re-coded and doesnt need to be replaced but am not sure if i have FRM 1,2 or 3

Car is 2010 LCI 335i (n54)

[Soden82]

There is a company that will rebuilt the FRM and it won't need to be recoded. You send it out to them and they send it back and it can go right in the car without programming. Think they charge $150.

Not sure the company name but if your on any of the N5X Facebook groups, someone will know.

[sdbmwcoding]

Originally Posted by BM3Rrrr

I was doing some maintenance on the car this weekend and disconnected the battery, once the work was done i reconnected the battery and had a code pop up (CDAB). I noticed the windows were no longer working, dash lights wont turn on, turn signals, angel eyes and a few other things weren't functioning. I researched the code and found it to be a fault with the module, likely caused by the battery being disconnected.

My question is can it be re-coded or does it need to be replaced?
From what i can gather the FRM3 can be re-coded and doesnt need to be replaced but am not sure if i have FRM 1,2 or 3

Car is 2010 LCI 335i (n54)

Most likely frm3 since frm3 have highest failure rate. You can also just pull it out and check on the part. It cannot be re coded through the obd port though. You need to remove it, connect directly to pins on the board and re write eeprom data to the frm3. Its a bit complex and requires special programmers. I'd recommend sending it out to get repaired, average price is $50-$150 or replacing it and coding the replacement unit in yourself.