>>If the company is in the business of scamming people on the warranty, can't they do it just as easily whether you service with them or not? The way this work

>>If the company is in the business of scamming people on the warranty, can't they do it just as easily whether you service with them or not? The way this works is that if you need warranty work done, the dealer submits a claim to the manufacturer saying "this car will need X hours of work and these parts to fix it" and if the manufacturer can see it's been serviced within their dealer network they just approve the claim. If they can't see the full service history on their own system they will ask the dealer to submit full documentation and proof that the car has been serviced properly before approving any work, and that requires effort from the dealer - so they'd rather say no. It's not that they want to scam you out of warranty - they just don't want to put the effort in.