You will need to find and pull the unit that is BM54 so that it may be taken or sent to a repair site.
The real BMW BM54 repair is normally so simple the unit can be returned to you on the exact same day it is received, or done in a few hours (should you take it in to a repair centre yourself) to be picked through to the day you drop it in.
You will discover a unit that is BM54 in some Land; the BMW 3 series; and the BMW X5 and Range Rover models. Your owner's manual should inform you what version of BM54 unit you've got in your own car.
The BMW BM54 repair begins with fault identification - so that you must tell your engineer what's wrong using the unit. Common faults in the BM54 contain loss of only some of the speakers working; total loss of sound; or audio to one or more channels. Remember that if one of your loudspeakers is flawed, or just the speakers in a single area of your vehicle are faulty, it might not be the BM54 unit at fault but wiring in the doors.
You can receive your BM54 unit checked for faults in situ before you send it away for the BMW BM54 repair. It is best to do this because you won't know for sure that it's the unit itself causing the difficulty. And undoubtedly if you send that unit off with no problem,, it's going to come back not wanting fixing and you'll still have that problem - plus you will have needed to pay the BMW BM54 repair centre for the time.
In the event you are not sure where to get a BM54 checked before repair, you can request the centre Range Rover BECM to which you're sending it to do a complete BMW diagnostic test on it before they begin to repair it.
Every BM54 unit is located below the spare tyre - normally in the boot well, in an area that was somewhat different. For directions on removing the unit that is BM54 prior to the BMW BM54 repair, refer to blogs or have a look in the manual of your manufacturer. For those who have any questions contact the business that's going to do your analysis and fix and request their advice.