And what tests did they perform to jump to this conclusion ?
B. Design and Defect Warranty
The Design and Defect Warranty covers repair of emission related parts which become defective
during the warranty period. The Design and Defect warranty for model year 1995 and newer
light-duty cars and trucks is outlined below.
Design and Defect Warranty Coverage for 1995 and newer light-duty vehicles:
•
Emission control and emission related parts are covered for the first 2 years or 24,000
miles of vehicle use (whichever first occurs); and
•
Specified major emission control components are covered for the first 8 years or 80,000
miles of vehicle use (whichever first occurs).
According to federal law, an emission control or emission related part, or a specified major
emission control component, that fails because of a defect in materials or workmanship, must
be repaired or replaced by the vehicle manufacturer free of charge as long as the vehicle has not
exceeded the warranty time or mileage limitations for the failed part.
What Are Specified Major Emission Control Components?
There are three specified major emission control components, covered for the first 8 years or
80,000 miles of vehicle use (whichever first occurs) on 1995 and newer vehicles:
•
Catalytic converters
•
The electronic emissions control unit or computer (ECU)
•
The onboard emissions diagnostic device or computer (OBD)
http://www.epa.gov/obd/pubs/420f09048.pdf