[mav1178]

Originally Posted by Crossover Auto

http://www.epa.gov/obd/pubs/420f09048.pdf

What Reasons Can the Manufacturer Use to Deny a Warranty Claim?
If your vehicle is within the age and mileage limits for the applicable emissions warranty, the
manufacturer can only deny coverage if evidence shows that you have failed to properly maintain
and use your vehicle, causing the part or emission test failure. Some examples of misuse and
malmaintenance include the following:
• vehicle abuse such as off-road driving or overloading; or
• tampering with emission control parts or systems, including removal or intentional damage
of such parts or systems; or
• improper maintenance, including failure to follow maintenance schedules and instructions
specified by manufacturer, or use of replacement parts which are not equivalent to the
originally installed parts.

-alex