Does Car Maintenance Outside 4S Stores Affect Warranty?

[Matteo]

Car maintenance outside 4S stores does not affect warranty under the following conditions: 1. Procedures and operations: Maintenance performed at non-4S shops must comply with the requirements in the manufacturer's service manual, and the repair shop must have a legitimate business license. 2. Providing relevant contracts: When claiming manufacturer warranty, you must present maintenance contracts, service items, quality inspection reports, and completion certificates from non-4S shops. 3. Proving maintenance necessity: If it can be demonstrated that the maintenance items performed at non-4S shops are unrelated to the vehicle's quality issues, the manufacturer cannot waive its three-guarantee responsibilities. 4. Insufficient documentation: If maintenance at non-4S shops doesn't follow the manufacturer's service manual procedures, uses non-genuine parts without authorization, or fails to provide corresponding maintenance contracts and service items, the 4S store has the right to refuse warranty service.