I’ve been dealing with an issue where the audio intermittently cuts out for one to two seconds across every source FM, DAB, AUX, and iPod via an Invery Bluetooth adapter. It happens several times during every drive, regardless of the source. On a few occasions, I’ve heard a brief crackle and pop from the speakers just when the sound drops, and one time it cut out, the audio options on the screen briefly greyed out while the power button blinked orange. The touchscreen itself stays fully responsive throughout, so the fault seems limited to the audio path rather than the head unit. Diagnostic codes show B1A01-13 and B1A02-13 (speaker circuit 1 and 2 open), both of which return a few hours after clearing. I’ve checked the amplifier area behind the plastic moisture barrier in the boot and it’s completely dry, with no corrosion or damp even after heavy rain and a hose test through the E-pillar. Sunroof drains look to be clearing water just fine as well. Power and ground connections look clean, and although I replaced a blown front-left door speaker some time ago, the problem began long after that. Once, while using the Invery, the iPod and USB options briefly disappeared from the screen before returning, but that only happened once.

If anyone has any ideas or suggestions that I can look at before spending more money on the car please let me know.

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