Harmon Kardon and water damage

[Vince Noir]

Evening all,

I have a 2016 BMW 4 series convertible (F33) which seems infamous for water leaks in the boot, especially where the HK amp (accessory code 688) sits. One day after particularly heavy rain I found no sound was coming from the car, not even the beeps and bongs from sensors or open doors.

I've checked as many fuses as I can identify, removed the somewhat junky Xtrons android unit and replaced with the original BMW screen - still no sound.

The HK amp is optical and I can still see a red and an orange light inside.

I've removed it and opened it up and it's nothing like as bad as some of the pictures I've seen online, although there is a tiny bit of deposit - see pics.

Has anyone had a go at repairing these at home?

I've read of folk dipping these in a vat of isopropyl alcohol and distilled water before cleaning off all the mineral deposits and corrosion. Sounds like a way I'd kill it completely though.

[Robertb]

I can't help you with a DIY repair, but Remanx might be worth a shout if you want to see if the unit can be repaired, as they do HK amps amongst other things.

[SteBrown91]

Also look at Cartronics (BM54.com)