When I lost sound on left side of car it turned out to be the BM53 (or BM54 for others) radio amp that had blown two channels. Got them repaired and upgraded and now the sound it back and even better than before.

Sent from my SM-G900F using Tapatalk

__________________
BMW X5 E53, 4.8iS - 2005
Professional Stereo/Nav with DSP (modified BM54 module) - Converted to Eonon GA5166X with Reverse cam
4-Corner Air Suspension - Converted to BC Coilovers