According to the Regulations on the Administration of Motor Vehicle Maintenance:
Article 38
During the quality guarantee period and the promised quality guarantee period, if the motor vehicle can't be used normally due to the maintenance quality, and the repairer can't or can't provide relevant evidence that the motor vehicle can't be used due to non-maintenance reasons within 3 days, the motor vehicle maintenance operator shall timely repair it free of charge, and shall not deliberately delay or unreasonably refuse.
Article 39
Motor vehicle maintenance operators shall publicize the promised motor vehicle maintenance quality guarantee period. The promised quality guarantee period shall not be less than the provisions of Article 37.
Article 40
The road transport management institution shall accept complaints about motor vehicle maintenance quality, and actively mediate maintenance quality disputes in accordance with the maintenance contract and relevant regulations.
Article 41
Both parties to a dispute over the quality of motor vehicle maintenance have the obligation to protect the original state of the vehicle concerned. When necessary, the relevant parts of the vehicle can be disassembled and inspected, but both parties should be present at the same time, which is the same as the approved disassembly inspection.
Article 42
The identification of motor vehicle maintenance quality responsibility needs technical analysis and appraisal. If the repairing party and the entrusting party request the road transport management institution to coordinate, the road transport management institution shall organize an expert group or entrust a testing institution with legal testing qualification to conduct technical analysis and appraisal. The appraisal fee shall be borne by the responsible party.
Extended data:
According to the Regulations on the Administration of Motor Vehicle Maintenance:
Article 23
Motor vehicle maintenance operators shall not modify motor vehicles, repair scrapped motor vehicles or assemble motor vehicles with accessories without authorization.
Article 24
Motor vehicle maintenance operators should strengthen safety education and professional ethics education for employees to ensure safe production.
Article 25
Waste generated from motor vehicle maintenance shall be disposed of in accordance with relevant state regulations.
Article 26
Motor vehicle maintenance operators shall announce the quota and charging standard of motor vehicle maintenance hours, and charge them reasonably.
Article 27
Motor vehicle maintenance operators shall use the prescribed settlement bills and deliver the maintenance settlement list to the entrusting party. In the maintenance settlement list, the working hours and material expenses shall be calculated separately. The standard format of the maintenance settlement list shall be formulated by the Ministry of Transport.
China government network-regulations on the administration of motor vehicle maintenance