Hey guys! I've been searching around the forums and can't find anything useful regarding my car. I've got a 2003 3.2TL Type-S w/Navigation that's been an absolute dream to me. So, my car has an issue with the subwoofer through an aftermarket head unit where the subwoofer is completely cut off. It's been doing this for a couple months now where it will cut off, then I would have to turn the volume up to around 24/40, where it would then cut on and work flawlessly. It is still the original factory Bose subwoofer. As far as I know, it still uses the factory Bose amps, but I'm no car audio expert. It's completely silent, save for the second I turn my headlights on. As soon as I turn the dial on the stalk, a buzz starts to come from the subwoofer, and it only gets louder when I turn the dial on my lower dash to dim the interior lights. It also changes pitch the more I dim the lights. What do you guys think could be causing this? Am I alone in this issue? The last thing I want to do is take it in to the shop and dish out unnecessary money over something I could've fixed myself. On to the head unit.

When I purchased my car, it came with an aftermarket head unit equipped, specifically the Pioneer AVH-4100NEX. This was a $700 stereo, not including installation charges. Whoever hooked it up did an awful job, as the USB connector is plugged into the iPod 2 slot on the back of the head unit, instead of the iPod 1 slot. So I can't use Apple CarPlay at all. There was also an aftermarket backup camera installed that only works when reversing. There's an option to view what's on the camera in the app drawer on the head unit, but when I open it, the screen remains black with the icons on the screen to go back or close camera view. On top of that, every once in a while my connection through the USB port using my iPhone's Lightning cable will start to crackle, then distort my music to where it doubles itself and starts playing off beat. This is fixed by unplugging the cable then plugging it back in. And it's not just my phone, but any device plugged in through USB through any Lightning cable. Bluetooth works just fine.

And another small thing, neither of my heated seats work. The switch will light up when placed in high or low, but even after several minutes the seats are still the same room temperature.

Any help would be greatly appreciated, I've searched the whole internet and found nothing. Thank you!!