Warranty "Law" - Insurance Consequences
The situation in respect of warranty for any manufacturer at the end of the day is as follows.
1) The whole vehicle cannot have its warranty terminated unless a) It is written off, b)it is exported outside of the EU and re-imported. Even so some manufacturers will honour warranties if official non-EU franchises have maintained the vehicles service history.
2) The fitting of ANY part or modification of any part including chipping and or exhaust mods, suspension changes etc, that can be shown to have caused a malfunction in one or more systems if those parts were fitted as non standard, non intended non-manufacturer approved modifications, gives the manufacturer the right to terminate warranty on the affected parts.
eg: your engine blows up because the mapping on the chip can be considered to have had a bearing on the problem - no warranty. It is up to YOU to prove it did not cause a the defect.
Most manufacturers are fairly lenient, but major issues will cause a lot of grinding teeth and blatant mods can cause warranty rejects, especially on wear and tear items.
The thing that bothers me about mods is that few people realise that anything and everything MUST be reported to your insurance company. Unless they approve the mods or know of them in writing, any accident you have no matter the cause they can and do refuse to pay out, in fact often consider that from the moment of installation if they are not informed, your insurance is considered null and void. As many of you will know this goes all the way down to how much tread you have on your tyres. Insurance companies will not pay out if tyre tread is below legal limits, even on one tyre.
The moral of the story is if you are going to do a mod, realise the consequences, in insurance and warranty. If you can afford not to care in warranty terms, fine, but nobody can afford to be without insurance -if you get caught the penalties are severe.