The technique of carrying out certification of the failed details of motionless interfaces is presented in article on the example of research of case details (transmissions, transfer cases, bridges) the car on technical condition of seats under bearings. It is shown that the majority of cases of transmissions, transfer cases, bridges come to repair with plus deviations of diameter of landing openings.

Keywords: defect, car, interface, certification, maximum deviation, seat, bearing, technical condition