And these days, the smart ones offer in-house ECU services, which is basically literally this: you pay more, to unlock mot performance. Or you do it outside the

And these days, the smart ones offer in-house ECU services, which is basically literally this: you pay more, to unlock mot performance. Or you do it outside the dealership's control and your warranty for whatever your mod changes (but not the warranty in general) is void for as long as you use your unofficial modifications.