Originally Posted by jcosta79

It all depends on your dealer. If you have a longstanding relationship with them (i.e. you've bought a lot of cars from them) they might be more understanding and look the other way.

Some dealerships don't care what you have on there, other dealerships will void you for a simple tune with no mods. It's really all up to them.

If you have a few different dealerships in your area you can go around and ask what their policy is on mods and warranty.


A good rule of thumb is anything that you do after the rear 02 sensors and before the MAF is not an issue (excluding tune).