Most basic maintenance reminder lights (like for changing the air conditioning filter) can be manually cleared using a combination of steering wheel buttons or through the engineering mode on the central control screen. We will provide internal guidance manuals for these hidden operations to our B2B clients.

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.

The 12V battery is small but critical: when it dies, the car cannot start, unlock, or charge. Used EVs often have weak 12V batteries because they sit on lots for months. Before shipping, ask the exporter to: 1. Measure the battery voltage after the car has rested overnight. It should read around 12.4-12.8V; anything under 12.2V means the battery is degraded. 2. Start the car and check that the charging system holds 13.8-14.4V, confirming the DC-DC converter works. 3. Scan for stored fault codes related to low voltage, which indicate the battery has been deeply discharged repeatedly. During ocean freight, the battery slowly self-discharges. Ask that it be disconnected or kept on a maintainer before loading, and budget for a replacement after arrival if the battery is over 3 years old. A new 12V battery costs little compared to being stranded at the port.