A good new car warranty should include clear limits, in terms of time and mileage, pertaining to how long it is valid for. So if it is a 36-month warranty, that means it lasts three years from the point of registration; if it says a 60,000-mile limit, that means the car automatically drops out of warranty if you do 60,001 miles or more in it.
The warranty covers the failure of either major mechanical components or electrical systems on the vehicle for the duration of the period stated. This means that if a part fails due to defective manufacturing processes, you won’t have to pay the price of that part and the associated labour costs (the hourly rate automotive mechanics charge) for fixing the issue.
A car manufacturer warranty normally covers:
Any failure of the engine and gearbox.
The suspension.
The brakes.
The steering.
The fuelling.
Onboard electrics.