For gasoline cars, insist on a compression test: each cylinder should read within 10-15% of the others, and the actual values should match factory specs for that engine. A single low cylinder points to worn rings or valve problems that idle checks will never reveal. A leak-down test goes further. It pressurizes each cylinder and measures how much air escapes and where. Air hissing from the oil filler cap means ring wear; from the intake or exhaust means valve issues; bubbles in the radiator coolant mean a head gasket problem. This is the single most revealing test for engine condition. Also request OBD scan data with freeze-frame records, a coolant system pressure test (to catch hidden leaks), and an inspection of the timing belt or chain condition with service history. For electric vehicles, compression tests don't apply — instead ask for a battery health report from the BMS, motor insulation readings, and a road test logging any inverter or drive-unit fault codes. A written report with photos or video of each test is essential evidence for your records.

Start by checking the after-sales clause in your contract—reputable exporters typically offer 3-12 months of parts support. The usual process: send the exporter a fault description with photos or a short video, plus your VIN and contract number. They will confirm whether it is a warranty case or a paid parts order. For warranty claims, common resolutions are free parts shipped with your next container, or a credit/refund for parts you source locally. Keep all communication in writing. To avoid long waits, ask for the OE part numbers in advance and check whether local dealers stock the same components—many Chinese brands share suppliers. Ordering common wear parts (filters, brake pads) together with the car shipment is the cheapest option by far.

Under CIF (Cost, Insurance, and Freight) terms, we will insure your vehicle with a reputable international insurance company for "All Risks" before shipment. If total loss or partial damage occurs during sea transport, the risk transfers to you once the goods cross the ship's rail. However, sellwellauto will not stand by; we will assist you in preparing complete claims documentation (such as the bill of lading, invoice, and damage photos) to initiate a cross-border claim process with the insurance company, minimizing your financial loss.