Head unit not programmed correctly
 

I just bought a 545i and notice when I turn on the car the head unit reads: HEAD UNIT NOT PROGRAMMED CORRECTLY! What should I do to get it working properly. Other than that, car runs great. Any help will be greatly appreciated,

Thanks

Was it doing that before you bought it? Sounds like somebody attempted to code it and botched up somewhere. Is it a Nav or non-Nav equipped car (easy way to tell - single disk slot or dual disk slots)?

I'd like a picture of that one.. new one on me

Did you buy it sight unseen? I would have asked the seller questions about this error before I purchased it, if maybe he tried coding something and failed. I would get as much info as possible about the cause of the error so you know where to begin trying to fix it. Otherwise you're looking for a needle in a haystack. Are you still in contact with the seller? I would call him up...

Just get someone with a optical device (OPS, etc) to reprogram or just take to the dealer and have the entire car updated.

there is a relay in the trunk under the spare tire. I spilled a bucket of water in the trunk one day {dont ask how ] and that relay shorted out. That relay controls cd/radio/head-up dispay. For 100$ you can get a new relay from a salvage dealer.When changed the relay, everything working now but at start up it says head unit not......

Ya that's the infamous MPM - Micro Power (control) Module, prone to liquid damage, along with the PDC. I had a liquid run-in with it years ago and picked up a new one and plugged it in. The head unit was fine. Quite a few others have had MPM failures and no head unit issues. It may be coincidental, or perhaps you encountered a short/surge that wiped your unit's programming.

Hmmmm....curious as to if the OP resolved this. No response in over a month?

Its been years since the last post, but for reference, anyone out there stuck with this message, here's how I fixed mine.

This error suggests that the idrive is partially programmed/updated. Updating the head unit is a long process and requires several ECUs to be flashed. To remove the error, make sure all of the related ECUs are flashed with the same daten version and all have the correct VIN.

The related ECU list can be a bit of a challenge to find in INPA. The ones that I updated were: MOSTGW, MMI/CCC, VIRTSG90, VIRTSG91. It was easy for me to find as my head unit was replaced by a 2nd hand unit and I picked all the ECUs with the previous vehicle's VIN to update

Hope this helps!

Help please !