Commencing with the 1990 model-year, the manufacturer of each motor vehicle and motor vehicle engine, other than a light-duty or medium-duty motor vehicle or motor vehicle engine, shall warrant to the ultimate purchaser and each subsequent purchaser that the motor vehicle or motor vehicle engine meets all of the following requirements:
(a) Is designed, built, and equipped so as to conform with the applicable emission standards specified in this part for a period of use determined by the state board.
(b) Is free from defects in materials and workmanship which cause the motor vehicle or motor vehicle engine to fail to conform with applicable requirements specified in this part for the same or lesser period of use established under subdivision (a).