It's extremely difficult. Unauthorized modifications can lead to module current overload protection, resulting in a lock. In China, you need to use the factory online engineer account to reprogram it. It's basically impossible to perform online decoding overseas. We strongly warn against blindly modifying the electrical systems of modern integrated circuit vehicles.

The key document is the 机动车登记证书 (Vehicle Registration Certificate), the green booklet proving ownership. Along with it, the seller should provide the 行驶证 (driving license for the vehicle) and their ID. Verification steps: 1. Check that the VIN/chassis number on the certificate matches the car exactly, stamped on the dashboard and door frame 2. The certificate's 所有人 (owner) field must match the seller's company name or the export agent they claim to work with 3. Look at the registration history pages—frequent transfers in a short period can indicate problem cars being flipped 4. Confirm the car is not marked 抵押 (mortgaged/pledged to a bank) Be cautious if the seller only shows photos of these documents and refuses a live video panning across the original booklet with the day's newspaper. Also verify the export company has 二手车出口资质 (used-car export qualification)—a legitimate exporter will share their license number, which you can cross-check on Chinese commerce bureau websites.

Most exporters offer a limited warranty of 30 to 90 days covering major mechanical failures (engine, gearbox, electric motor), but only if you can prove the fault existed before shipment. Cosmetic issues, wear-and-tear parts (brakes, tires, clutch) and damage caused by improper local maintenance are almost always excluded. What is realistic to claim: · Engine or transmission failure confirmed by a licensed workshop within the warranty window, with a diagnostic report. · Undeclared accident or flood damage discovered after arrival (strongest case, keep the inspection report and photos). How to protect yourself: 1. Get the warranty terms written into the contract, including claim procedure and response time. 2. Have the car inspected locally immediately upon arrival and keep all records. 3. Communicate claims in writing (email) with photos and reports attached. Treat the warranty as a backup, not the main protection. A thorough pre-shipment third-party inspection matters far more than a paper warranty.