Keller Tire & Service Center installed an aftermarket catalytic converter on a 2002 Volkswagen Jetta that was still under the Volkswagen emissions warranty. The aftermarket catalytic converter was not equivalent to the original manufacturerÂs converter and furthermore the installation did not comply with EPAÂs policy for ÂSale and Use of Aftermarket Catalytic ConvertersÂ, which disallows use of aftermarket catalytic converters within the emissions warranty period. As a result, the company is liable for 1 violation of Section 203(a)(3) of the Clean Air Act, 42 U.S.C. § 7522(a)(3).