Warranty still in force when you service your ride outside following the service schedule. The ony thing is that they will try to wiggle their way out of it. If you think about it, how can servicing affect your warranty. They can void your warranty on the engine if you modify it and if you don't use oil to the stated specifications or non nissan parts as they can claim that the parts damaged were casused by these non nissan parts. With that being said, think TC has one of the cheapest service package from agents.