Because it's piggybacking off of the electrical system that isn't designed for an aftermarket audio system and the added power draw of it.
Subaru of America is very stringent to the warranty contract and the limits of the MM act. If it is a non OEM equivalent part attached to a system there is a very high likelihood that system will see warranty claim denial.
This needs to be made really clear because it comes up every time someone posts these threads. The Magnuson moss act does not do what people think. It is your right to repair your automobile with equivalent parts not made by the OEM. It is not your right to change to performance parts, or add a bunch of audio parts, or drill a bunch holes in the body and expect warranty for any of those systems.
It also is not "they have to prove". It's this part makes the vehicle operate outside of OEM design thus we have the right to deny.
If you are worried about warranty issues on a system you want to modify. It's best you don't modify it.
Subaru of America is very stringent to the warranty contract and the limits of the MM act. If it is a non OEM equivalent part attached to a system there is a very high likelihood that system will see warranty claim denial.
This needs to be made really clear because it comes up every time someone posts these threads. The Magnuson moss act does not do what people think. It is your right to repair your automobile with equivalent parts not made by the OEM. It is not your right to change to performance parts, or add a bunch of audio parts, or drill a bunch holes in the body and expect warranty for any of those systems.
It also is not "they have to prove". It's this part makes the vehicle operate outside of OEM design thus we have the right to deny.
If you are worried about warranty issues on a system you want to modify. It's best you don't modify it.