A friend of mine went to look at a 2021 Model 3 last month. The listing said "excellent condition, one owner." The car looked spotless in photos. He drove two hours to see it, sat in the driver's seat, and the seller had already started the car and set the climate to a comfortable 21 degrees before he arrived. Nice touch. Except the car had also been fully charged to 100% that morning, which is the easiest way to make a battery look healthier than it actually is at delivery.
He caught it, asked the seller to let it sit and drop to a normal state of charge, and came back a different afternoon to check the numbers again. That is the kind of thing a used Tesla buyer needs to know before they show up, not after they've already handed over a deposit.
Buying a used gas car and buying a used Tesla are different exercises. Nobody ever asked a Camry seller for the state of the traction battery, and nobody ever needed to check whether the infotainment computer's storage chip was close to failing. Electric cars, and Teslas specifically, carry a different set of failure points that a normal pre-purchase inspection does not cover. Here is the list worth working through before you sign anything.
1. Battery health at delivery, not on the listing photo
Ask the seller to show you the car at roughly 50% to 80% state of charge, not fully charged and not near empty. A battery reads its healthiest right after a full charge, which is exactly why sellers charge to 100% before a viewing. It is not necessarily dishonest. It is just not the number you want.
The number that actually matters is the estimated range at 100% compared to the car's original EPA-rated range when new. If a 2021 Long Range Model 3 shipped with an estimated 566 km and the car now shows 520 km at a genuine full charge, that is roughly 8% degradation, which lines up with normal wear at that age and mileage. We go into what counts as normal versus concerning in our piece on Tesla battery degradation, including how NMC and LFP packs age differently.
2. Degradation against mileage, not just age
A 3-year-old car with 30,000 km on it should have less wear than a 3-year-old car with 90,000 km on it, even if both show the same age on paper. Ask for the odometer reading and cross-check the degradation percentage against it. A car with unusually high degradation for its mileage might have been supercharged constantly, kept at 100% charge for long stretches, or driven hard in extreme heat.
None of those are deal breakers by themselves. They are just things to ask about directly, and a seller who gets defensive about the question is telling you something.
3. MCU and storage health
Older Teslas, particularly Model S and Model X built before mid-2018 with the first-generation media control unit, used an eMMC storage chip that wears out over time and can eventually cause the entire touchscreen to freeze, reboot, or die completely. Tesla ran a recall and free replacement program for the worst-affected units, but not every affected car got fixed, and not every used listing tells you which storage generation is under the screen.
Ask directly whether the MCU has ever been replaced, and if so, when. A screen that occasionally lags, takes a long time to boot, or randomly reboots while driving is a warning sign worth taking seriously, even on a car that otherwise looks pristine.
4. Hardware version: HW3 versus HW4
Tesla's self-driving computer has gone through multiple generations, generally referred to as Hardware 3 (HW3) and Hardware 4 (HW4). This matters for two reasons: resale value and whether the car can run current and future FSD software versions at full capability. HW4 cars, generally those built from 2023 onward, have more camera resolution and processing headroom.
Tesla has run paid upgrade programs from HW3 to HW4 in the past, and pricing and eligibility shift depending on the region and time of year. If FSD matters to you, confirm the hardware version with the VIN decode or by asking the seller to check it in the car's software menu, not just by trusting the build year.
5. FSD transferability
Whether Full Self-Driving (or Enhanced Autopilot, depending on what was purchased) transfers to a new owner has changed policy multiple times over the years. In some periods Tesla allowed a one-time transfer, in others it did not transfer at all, and pricing structures for the underlying feature have shifted repeatedly.
Do not assume a car listed as having FSD will keep that software after the sale. Confirm directly with Tesla, or through the account, what happens to the feature when the VIN changes hands. This single detail can swing a used Tesla's real value by several thousand dollars depending on current policy.
6. Full service history
Tesla's service history lives in the account tied to the vehicle, and a seller can usually pull a service record summary from their app or through a service center visit. Ask for this directly rather than relying on verbal claims about "no issues, ever."
Look specifically for drive unit replacements, suspension work, and any battery-related service visits. A replaced drive unit is not automatically bad. Tesla has swapped drive units under warranty for minor issues on plenty of otherwise healthy cars. But you want to know it happened and why.
7. Crash history and collision red flags
Pull a vehicle history report through Carfax or a similar service using the VIN. Beyond the report itself, walk the car in daylight and check panel gaps around the doors, hood, and trunk. Uneven gaps, mismatched paint texture between panels, or overspray on rubber trim are signs of prior bodywork that may not show up on a history report, especially if a repair was paid out of pocket and never filed as an insurance claim.
Check the frunk and trunk seals too. A car that has been in a moderate front or rear collision sometimes has a frunk or trunk lid that does not sit flush anymore, even after a competent repair.
8. Warranty status remaining
Tesla's warranty coverage is split between the basic vehicle warranty and the separately tracked battery and drive unit warranty, and the two run on different clocks. Confirm both directly rather than assuming from the car's age alone, since a low-mileage older car can still have plenty of warranty left while a high-mileage newer car might not.
| Coverage | Basic vehicle warranty | Battery and drive unit warranty | | --- | --- | --- | | Model 3 / Model Y, Rear-Wheel Drive | 4 years or 80,000 km | 8 years or roughly 160,000 km | | Model 3 / Model Y, Long Range or Performance | 4 years or 80,000 km | 8 years or roughly 192,000 km | | Model S / Model X | 4 years or 80,000 km | 8 years, unlimited km on some trims |
Warranty terms have shifted by region and model year in the past, so treat this table as a starting point and confirm the exact figures for the specific VIN through Tesla's own lookup tools before you finalize anything.
9. Title status and liens
Confirm the title is clean, not a rebuilt or salvage title, and that there are no active liens against the vehicle. This applies to any used car purchase, but it matters even more on a Tesla because a salvage title can complicate warranty claims and future service, and some insurers price salvage-titled EVs very differently than a clean title.
If you're buying through a private sale rather than a dealer, get the lien release in writing before money changes hands, not as a promise to follow up later.
10. Tire wear pattern
Uneven tire wear, particularly more wear on the inside edge, can point to alignment issues from a prior impact or just aggressive driving habits. Since tire pressure and wear both affect range in measurable ways, as we covered in our piece on tire pressure and range, mismatched or unevenly worn tires are also a small tell about how the previous owner treated the car day to day.
Check all four tires, not just the front two. A rear-wheel-drive Tesla wears its rear tires faster under normal use, so uneven front wear specifically is more likely to point to an alignment problem than normal wear patterns would suggest.
11. Charging port and cable condition
Open the charge port and look for corrosion, bent pins, or a door that does not latch cleanly. A charging port that has been forced or damaged is a real repair cost, and it is easy to miss during a quick walkaround since most buyers never actually plug the car in during a viewing.
Ask to see a charging session start to finish if possible. This also doubles as a live check on charging speed, which should roughly match what is expected for the car's onboard charger and the outlet or charger being used.
12. The real test drive
A test drive that stays under 20 km/h in a parking lot tells you almost nothing. Get the car onto a road where you can accelerate to highway speed, brake firmly from a reasonable speed, and drive over some rough pavement.
Listen for a whining or grinding sound from the rear (or front, on all-wheel-drive cars) under acceleration, which can indicate drive unit wear. Feel for clunks over bumps, which point to suspension components. Test one-pedal driving specifically, since regenerative braking that feels weaker or more abrupt than expected can be an early sign of a battery or software issue worth asking about directly.
Red flags that mean you walk away
Some issues are fixable and some are not worth the hassle. A seller who refuses to let you see the battery at a partial charge, who cannot produce any service history at all, or who gets vague about whether the car has ever been in an accident is giving you useful information even without saying it directly.
A car priced noticeably below similar listings in the same condition and mileage is worth extra scrutiny, not extra excitement. In a market with plenty of used Tesla inventory, an unusually low price is rarely just good luck.
Before you hand over money
Walking through all twelve points takes maybe 45 minutes if the seller cooperates, and a seller who is proud of the car they are selling generally welcomes the scrutiny rather than resisting it. The ones who push back hardest are usually the ones with something to hide, whether that is a battery that degraded faster than it should have or a repair that never made it into any paperwork.
If you already own a Tesla and want to keep closer tabs on your own battery health long after the sale, that is exactly the kind of question Volt is built to answer in plain language instead of a chart you have to interpret yourself. See what we're building.