Legal analysis: 4s shop signed an accident car maintenance agreement before repairing the car. An agreement is a written material signed by two or more partners in social life to protect their legitimate rights and interests after reaching an agreement through consultation. An agreement is a contract document. It is a legally binding and practical document signed by both parties (or parties) after reaching an agreement through consultation in order to solve or prevent disputes, or establish legal relations and realize certain interests and wishes.

Legal basis: Article 5 10 of the Civil Code of People's Republic of China (PRC). After the contract comes into effect, the parties have not agreed or clearly agreed on the quality, price or remuneration, place of performance, etc. They can supplement the agreement; If a supplementary agreement cannot be reached, it shall be determined in accordance with the relevant provisions of the contract or trading habits.