They're pretty comprehensive but do have their limitations. Kia covers batteries for 24 months, air conditioning refrigerant for 24 months, wheel balance and steering alignment for 1000 miles or one month, cracks in the exterior glass for 1000 miles or three months, audio and navigation units for 36 months/60,000 miles and paint defects for 60 months/100,000 miles.

MG's warranty covers the battery until the first service, 36 months for the paint (including alloy wheels) and 36 months/45,000 miles for audio/navigation. Obviously, there are various terms and conditions (covering cars used as private hire vehicles, for example) and you'll need to have the car serviced as per the recommended servicing plan to keep the warranty valid.