Used EV Buying Checklist: 10 Things to Check Before You Buy

Used EVs are one of the best deals in the car market right now. Rapid depreciation means you can get a 2-3 year old electric car for 40-60% of its original sticker price. But EVs have different failure modes than gas cars, and the usual “check the Carfax and kick the tires” advice misses the most important stuff.

Here are the 10 things that actually matter when buying a used EV.

1. Battery State of Health (SoH)

This is the single most important number on a used EV. Battery state of health tells you what percentage of the original capacity remains. A 2020 Tesla Model 3 with 95% SoH still has 257 miles of its original 270. One with 82% SoH only has 221 miles — and it’s degrading faster.

How to check: Ask the seller for a screenshot of the battery health screen. On Teslas, third-party apps like Recurrent or Tessie can show degradation curves. For other brands, the dealer can run a diagnostic. If the seller refuses to share battery health data, walk away.

Red flag: SoH below 85% on a car under 5 years old suggests either excessive DC fast charging, extreme climate exposure, or a defective pack.

2. Charging Capability

Not all EVs charge at the same speed, and some older models are painfully slow. Check both the onboard AC charger (Level 2) speed and DC fast charge capability.

Key numbers: Look for at least 7.2 kW AC charging (some older EVs only do 3.3 kW, which means overnight charging barely fills up). For DC fast charging, anything under 50 kW peak means road trips will be painful.

Watch out for: Early Nissan Leafs with CHAdeMO (dying standard), and any EV without DC fast charge capability at all (some base trims omit it).

3. Software Update Status

EVs are computers on wheels. Outdated software can mean missing features, known bugs that were fixed in later updates, or even reduced charging speeds.

What to do: Check if the car is on the latest firmware version. For Tesla, this is visible in Settings > Software. For others, ask the dealer to verify. Some manufacturers (like Nissan for older Leafs) stop pushing updates after a certain point — that’s worth knowing before you buy.

4. 12V Battery Age

This catches people off guard: EVs still have a traditional 12V battery for accessories, computers, and door locks. When it dies, the car is completely bricked — you can’t even open the doors normally.

Check: Ask when the 12V was last replaced. Most need replacement every 3-5 years. A dead 12V on a Tesla costs $100-200 to replace but can leave you stranded. Budget for replacement if the car is 3+ years old and still on the original battery.

5. Service History and Maintenance Records

EVs need less maintenance than gas cars, but they still need some. Brake fluid should be changed every 2-3 years (regenerative braking means the pads last forever but the fluid still absorbs moisture). Cabin air filters, coolant, and tire rotations still matter.

Why it matters: A complete service history indicates an owner who cared about the car. Missing records on a 4+ year old EV is a yellow flag — not a deal-breaker, but worth reflecting in your offer price.

6. Title Status and Accident History

Same as any used car, but EVs have a specific risk: flood damage. Water and high-voltage battery packs are a dangerous combination. A flooded EV may work fine for months before corrosion causes catastrophic failure.

Always check: Run the VIN through Carfax or AutoCheck. Look for salvage titles, rebuilt titles, flood damage, or lemon law buybacks. Also check NHTSA recalls for open campaigns on the specific VIN.

7. Open Recalls

EV recalls are more common than you’d think, and some are serious — battery fire risk, sudden power loss, or charging system faults. The good news: recalls are free to fix at any dealer. The bad news: some recall parts take months to become available.

How to check: Enter the VIN at nhtsa.gov/recalls. Don’t rely on the seller saying “everything is up to date” — verify it yourself.

8. Warranty Transfer

EV battery warranties are typically 8 years / 100,000 miles (federal mandate). But the details vary by manufacturer. Some warranties cover degradation below a threshold (e.g., Tesla covers if capacity drops below 70%). Others only cover total failure.

Key question: Does the warranty transfer to the second owner? Most do, but verify with the manufacturer. Knowing you have 4 years of battery warranty remaining changes the risk calculus significantly.

9. Real-World Range Test

EPA range is a lab number. Real-world range depends on your speed, climate, terrain, and driving style. Highway driving at 75 mph can reduce range by 20-30% versus the EPA estimate. Cold weather knocks off another 20-30%.

What to do: During the test drive, note the energy consumption display (Wh/mi or kWh/100mi). Compare it to what owners report on forums for that model. If the car shows 320 Wh/mi but owners typically see 250, something may be wrong with the battery or drivetrain.

10. Total Cost of Ownership

Used EVs are cheap to buy but the savings math depends on your situation. Factor in: electricity cost (check your utility rate — off-peak vs. on-peak matters), insurance (EVs are typically 15-25% more expensive to insure), and tire replacement (EV-specific tires cost more due to weight and low-rolling-resistance requirements).

The real calculation: Compare monthly cost of ownership (payment + insurance + electricity + tires) against the equivalent gas car. The EV usually wins, but not always — especially if you don’t have home charging and rely on DC fast chargers ($0.30-0.50/kWh vs. $0.12-0.15/kWh at home).