Quality assurance is based on three aspects: one, equipment guarantee, Lear has the world advanced production equipment, a high degree of automation, minimally reduces the influence of human factors, this is a fundamental guarantee of product performance; two, advanced testing equipment, Israel section instrument, British direct read optical spectrometer meter, universal electronic material testing machine, gloss meter, metallographic microscope, fatigue testing machine, low temperature and constant temperature test box and other sophisticated equipment, with a full range and capacity of the entire process of detection for each product in the wholeprocess of quality control; three, system guarantee, Lear built a strict quality guarantee system, implement the whole process of quality control system, so that the production process can be in near detection and strict control, ensur product quality.