Car warranties can be voided if you fail to properly maintain your vehicle. Regular maintenance, including oil changes, will help ensure that your warranty remains valid. To find your vehicle's suggested routine maintenance, look in the owner's manual.
Aftermarket installations and modifications may also void your warranty. If an aftermarket installation or modification causes damage or malfunction to other parts of your car, your warranty will not cover those car repairs.
When buying a warranty, carefully review the terms of your warranty and ask your representative for more information on how to ensure that your warranty remains valid.