How to Inspect a Used EV Before You Buy
Buying a used electric vehicle is different from buying a used gas car. There is no engine to listen to, no transmission fluid to check, and no exhaust to sniff. Instead, you need to evaluate battery health, charging infrastructure compatibility, and EV-specific wear items. This 20-point checklist covers every critical inspection area so you can buy with confidence.
Battery Health Is the Most Important Check
The battery is the most expensive component in any electric vehicle. Use a service like Voltest or Recurrent to check the State of Health (SoH). An SoH above 90% is excellent, while anything above 84% is considered average. Also review the DC fast charge ratio — heavy DCFC usage (over 50%) accelerates degradation and should be used to negotiate price. Don't forget the 12V battery: if it's over 3 years old and isn't a lithium-ion unit (Tesla 2021+), replace it immediately to avoid being stranded.
Charging Port and Cable Verification
Shine a flashlight into the charging port and look for soot, melting, or bent pins. Open and close the charge port door at least 3 times — grinding or sticking can mean a $600 to $1,000 repair. Confirm the mobile charging cable and any NACS/CCS adapters are included. Test both Level 1/Level 2 AC charging and DC fast charging at a public station to verify everything works.
Tires, Wheels, and Mechanical Inspection
EVs are significantly heavier than gas cars, so they need properly rated tires. Check the sidewall for EV, XL, or HL markings — non-EV tires cause about 10% range loss and suggest the previous owner skimped on maintenance. Inspect wheel rims for curb rash, which is a proxy for rough driving habits. Drive over speed bumps to listen for the 3 Cs (Clunking, Clicking, Creaking) in the suspension. Perform a neutral brake test by shifting to neutral and braking — grinding means rusted rotors. Finally, inspect the underside battery case for dents or scrapes.
HVAC, Tech, and Interior Checks
Blast the heater on MAX — if it doesn't get hot, a resistance heater replacement can cost around $1,200. Test wipers and washer sprayers (a known failure point on Chevy Bolts). For Teslas, cycle through all camera views and look for flickering or blackouts. Inspect the center screen for yellow borders or ghosting. Test every window, door, and lock — EV door parts are expensive to replace.
Paperwork and Diagnostic Codes
Cross-reference the battery SoH with the asking price. A privately owned, well-maintained EV is worth significantly more than a former rental. Check the dashboard for service mode alerts — on Teslas, look for BMS or VCFRONT codes; on other EVs, scan for OBD-II diagnostic trouble codes before finalizing your purchase.