Typical dealer finger pointing. The Caymans have been known for A/C leaks and these guys have the nerve to blame it on a subwoofer. Nothing is impossible, but this is very improbable.

I spent many years installing electronics into cars professionally. I can tell you dozens of stories of dealerships blaming me/us for issues we didn't cause. When they see any aftermarket product, the finger comes out and the blaming begins.

Back in the early 90's, when car alarms were must have additions to every car, I concocted a cool ad to get people into my shop. I advertised 'Auto Theft Deterrents starting at $49 installed'. Now, like any leader ad, this was an attempt to get people to call or visit so I could sell them on why they needed a full system for $399. The $49 I mentioned got you an LED on the dash that blinked when the key was turned off (2 wires) and a set of stickers for the windows. You know, "Protected by Xxxxman Security System". Believe it or not, I sold plenty of the $49 packages.

Well, one day I got a call from a customer that told me that his car died. He took it to the dealer and they said that the security system blew out the ECU, and on, and on. I had to visit the dealership to tell them there was no security system. Just an LED and stickers. Boy did they look like dopes.

I could tell you dozens of these stories. We called them damage claims. And 90% of the time they were BS. But right or wrong, this is the risk you take when you modify your car in any way. Sure, the Magnuson Moss Warranty Act provided protection, but nothing protects you from the hassle that the dealership will sling your way.