《上海市电动自行车消费争议纠纷解决办法》第十三条规定:“电动自行车在”三包“有效期内,主要部件电机、控制器、传动系统、制动系统,发生影响使用性能的相同故障,经过两次重复修理,仍不能正常使用的,凭特约修理者提供的修理记录和证明,由销售者负责为消费者调换同型号同规格的电动自行车。因无同型号同规格的产品,消费者不愿调换其他型号规格产品要求退货的,销售者应当予以退货。退货应收取折旧费。” “Shanghai electric bicycles dispute consumer dispute resolution,” Article XIII provides: “electric bicycle in the ” Three Guarantees “valid period, the main components of the motor, controller, transmission system, brake system, the use of performance-affecting The same failure, after repeated repairs, still can not be used normally, with the repair records provided by special repairers and prove that the seller is responsible for the exchange of consumers with the same type of electric bike specifications with the same model without the same product specifications , Consumers are reluctant to exchange other types of product specifications required return, the seller should be returned .Debt should be depreciated. ”