Wanting to share some of my experiences and solutions with the forum.
I currently own the following BMW products and am a DIY person....
2011 X5 35D
2010 Mini Cooper S
My X5 air suspension started sagging overnight due to airbags leaking. I replaced with Suncore airbags - made in America $64 each. Received them in about 4 days worked great. Installation took about 30 min.
My suspension compressor blew the 40 amp fuse. I replaced it. Fuse was in wheel well fuse block. Compressor worked great, but I got multiple errors which included the following:
Passenger Restraint system malfunction
Pano roof would not operate
Map lights and courtesy lights not functional
Head lamps in auto mode did not function
No power to center console 12V aux outlet
Looked and checked all fuses, no blown fused found.
Went into dealership and spoke with service advisor who then spoke with technician.
They said this is common problem related to FRM module or Footwell Module and BMW has now recognized this defect to certain serial numbers. Mine was included. Warranty has been extended by BMW to affected serial numbers.
Cost to replace would have been $3,000.
Coverage is limited until 125,000 miles.
They were getting a lot of FRM failures when people replaced or disconnected their battteries.