Battery condition is the single most important — and most expensive — variable in a used EV. Ask for a State of Health (SOH) report: in China, dealers and authorized service centers can read it via the manufacturer diagnostic system. It shows remaining capacity as a percentage of the original. Rule of thumb: above 90% is excellent, 85-90% is acceptable for the price, below 80% needs a serious price cut or battery refurbishment. Also get the battery's full charge and discharge history (次数) — a 3-year-old car with 800 fast-charge cycles has lived a harder life than one with 200. Physically, inspect the battery pack enclosure on a lift for dents, corrosion, or coolant leaks. Check that DC fast charging works during a test charge. Finally, verify the battery is not covered by an open recall or replacement program — this is both a risk and sometimes a free upgrade.

A structured live video inspection can catch most mechanical problems. Ask the seller to do the following in order: Cold start: film the engine bay before starting — check for leaks, cracked hoses, and corrosion. Then start from cold and listen for rattling or knocking during the first minute; abnormal noises on cold start often mean worn internals. Fluids: pull the oil dipstick — milky or foamy oil suggests head gasket issues. Check coolant color and level. Transmission: with the car warmed up, film each gear shift, forward and reverse. Hesitation, harsh jerks, or slipping RPM are red flags. Brakes: test at low speed in a safe area — the pedal should feel firm, not spongy, and the car must not pull to one side. Tires: walk around and film each tire's sidewall and tread. Uneven wear suggests alignment or suspension problems. Combine this with an independent pre-shipment inspection for a professional report — the video call is your first filter, not the final verdict.

VIN consistency is checked at customs in both China and your country, and a mismatch can block clearance. Do the following: 1. Verify early: before payment, ask for clear photos of the VIN plate (dashboard, door frame, engine bay on some models) and compare them with the VIN on the purchase contract, inspection report and any registration documents. 2. Check the characters: VINs never contain the letters I, O or Q. If you see them, the document is either fake or mistyped. 3. Decode it: the first 3 characters are the world manufacturer code, characters 4-8 describe the model and configuration. Decode it online to confirm the documents match the actual trim level you are buying. 4. At destination: when the car arrives, re-check the VIN against the bill of lading and your import declaration before accepting delivery. Any discrepancy found before shipping can be corrected cheaply; after arrival it becomes a legal problem. Make VIN verification part of your pre-shipment inspection checklist.