How do I check that a new Chinese EV shipped from China is really new, not a repaired accident car?
You cannot tell from outside, but the OEM diagnostic system can. Every controller fitted at the factory is provisioned with the vehicle’s security keys and registered to the VIN. A module fitted later, in a repair shop, has not been through that step and the OEM software reports it as not provisioned. In one session, before you sign the acceptance, an OEM engineer checks every controller and reports which ones are original.
Why does this happen to imported Chinese EVs?
Cars leave China through several hands, and a car repaired after a transport or test-drive accident can be resold as new once the body work is done. Paint, panels and interior give nothing away. What a body shop cannot fake is the factory process: when the car is built, each controller receives the vehicle’s cryptographic security keys and is matched to the VIN in the manufacturer’s backend. The OEM diagnostic software shows, controller by controller, whether that provisioning was done.
In a real case the exterior was flawless. Connected to the OEM system, the battery management system (BMS) and the rear electric drive system (REDS) both came back as not security-key-provisioned: neither was the unit installed at the factory. Two of the most expensive assemblies in the car had been replaced, the signature of a rear collision severe enough to open the high-voltage system, and the car was being sold as new.
What happens in the remote session?
You send the VIN, the seller’s description and a few photos. Before the session we check the VIN in the manufacturer’s database: mass-production or test vehicle, build date, warranty status, whether a master account can still be registered.
Cable in, EV Fix Connector open, engineer connected, ideally while the car is still at the port or in the dealer’s yard. The engineer scans the full topology and checks the security key provisioning status of every controller in the OEM software: provisioned at the factory, or not.
The engineer then reads what a repair leaves behind as supporting evidence: crash records in the airbag controller, battery history in the BMS (cell data, insulation values, cycle count), high-voltage interlock status, fault memory including cleared-code counters, and mileage as each controller recorded it.
You receive a written acceptance report the same day: original or not for each module, with the evidence. Use it to accept the car, negotiate, or reject it and claim against the seller.