The Complete Used Tesla Model S and Model X Buyer’s Guide

The Tesla Model S and Model X have reached the strangest and most interesting point in their long lives. Tesla has ended production of both, decommissioning the Fremont lines that built them, which means the Model S and Model X are now entering their used car era. The car that proved an electric sedan could be desirable, and the SUV that made falcon wing doors a status symbol, are now used cars with used car prices.

A 2017 Model S that once stickered against six figure German sedans can now be found in the low twenties. A mid decade Model X sits in similar territory. That’s an enormous amount of luxury EV for the money, and it’s exactly how people talk themselves into trouble.

A cheap Model S isn’t a cheap car. It’s an aging luxury EV packed with expensive systems that Tesla revised almost continuously during its fastest years of development. Two cars built a single year apart can have different computers, different motors, different suspensions, and wildly different long term risk. The mileage on the odometer tells you far less than the year, the configuration, and the repair history.

So this guide is built around one idea. Do not buy the model year. Buy the hardware, the configuration, and the history. A real buyer’s guide tells you what breaks, on which cars, how serious it is, and whether it was ever fixed.

One ground rule. Everything you’re about to read is my take, built from years of watching these cars age, reading the recalls, and listening to the specialists who take the motors apart. Call it a very opinionated field guide. What it can’t be is a diagnosis of the specific car you’re eyeing, because no article can do that from here, and I’d be a little suspicious of one that claimed it could. So use this to know where to point your flashlight, then hand the actual car to someone who knows Teslas before any money changes hands. Deal? Good. Let’s find you a great one.

The Production Eras You Need to Know

Tesla ignores traditional model year cycles and changes parts whenever a better one is ready, so a calendar year is a loose guide at best. Still, both cars fall into a handful of broad eras, and knowing which era a car belongs to tells you most of what you need to know about its risk profile.

A couple of dividing lines inside those eras matter enormously, and they come straight from Tesla’s own service material. Cars built before March 2018 use the older infotainment computer that’s subject to a recall, which we’ll get to. And Tesla’s service documentation marks a Raven drivetrain change at a build date of April 25, 2019, splitting the earlier small drive unit cars from the later Raven front drive unit cars. Those cutoffs will come up repeatedly, so keep them in mind.

The practical upshot is simple. A well documented 2019 Raven Long Range with 90,000 miles can be a smarter buy than an untouched 2014 with 45,000 miles, because the newer car has newer versions of nearly everything that tends to fail. Let’s look at what those failures are.

Quick Reference. What to Check by Era

If you already have a specific car in mind, this table points you straight at what deserves scrutiny on it. Each item is explained in full further down.

Known Problems by Generation, and What They Cost You

Here’s each significant issue tied to the cars it affects, what fails, how you detect it, how serious it is, and whether Tesla ever revised the part or issued a recall or bulletin.

The Large Drive Unit Coolant Leak (early rear drive and Performance cars)

If you’re looking at an early car, investigate this first. Tesla used several drive units across the legacy years, and one of them, the Large Drive Unit or LDU, has a well documented internal coolant leak that independent Tesla motor rebuilders describe as a pattern failure rather than bad luck.

A rotor shaft seal inside the motor eventually fails and lets coolant migrate into places it doesn’t belong. Once inside, the coolant flushes grease out of the bearings, corrodes the copper windings, and can short the inverter electronics, which eventually kills the drive unit. Because the leak is internal, you may never see a puddle under the car.

The important nuance, and one a lot of buying guides get wrong, is that not every 2012 to 2020 car has an LDU. The Large Drive Unit lived primarily in the rear of rear wheel drive Model S cars and in the Performance versions of the dual motor Model S and Model X. Many non Performance dual motor cars use other drive unit arrangements and don’t carry the same risk. So this is a configuration issue, not a blanket model year issue.

What to watch for is a new high pitched whine or grinding from the motor, reduced power warnings, high voltage isolation faults, or unexplained coolant loss. A specialist familiar with the LDU can inspect the rotor sensor area for signs of moisture. Specialists also report that Tesla eventually produced a redesigned replacement unit, commonly identified by a “-U” part suffix, that reroutes the cooling path and resolves the flaw. This is one of those rare cases where a car that has already had its drive unit replaced with the newer revision is worth more than an otherwise identical car still on its original motor. Don’t accept “it’s a 2020, so it’s fine” as an answer. Ask for the actual drive unit history and part revision.

How serious is it? Potentially expensive if the car is out of the powertrain warranty. The good news is that Tesla’s battery and drive unit warranty runs a generous eight years, so many affected cars had the repair covered, and a documented later revision replacement substantially reduces this particular coolant intrusion concern.

Acceleration Shudder and Front Halfshafts (2014 to 2020 dual motor cars)

This one is well documented because Tesla issued its own repair bulletin, and unlike the LDU it’s an inconvenience rather than a threat. Tesla’s service bulletin SB-21-39-001, titled “Replace Front Drive Unit Halfshafts,” covers 2014 to 2020 Model S and X and states that some versions can develop excessive vibration during hard acceleration, particularly at higher ride height settings. Tesla is explicit that this is purely a noise and vibration issue and doesn’t affect steering, braking, or acceleration safety. The bulletin was revised several times between 2019 and 2021, and it even contains separate procedures for the earlier small drive unit cars and the later Raven front drive unit cars split at that April 2019 build date.

It’s easy to test on a drive. Put the car in a higher suspension setting if it has air suspension, find a safe stretch of road, and accelerate firmly. A healthy car pulls cleanly. A pronounced shudder through the front end under load means the halfshafts need replacing. Don’t let a seller dismiss it as normal, because Tesla issued a repair bulletin specifically addressing the condition with updated halfshafts. Some owners report the fix isn’t always permanent, so a recent halfshaft replacement is reassuring but not a lifetime guarantee.

Front Suspension Fore Link Failures (2015 to 2017 S, 2016 to 2017 X)

Take this one seriously because NHTSA investigated it. The federal safety agency opened a preliminary evaluation into front suspension fore links that can fracture at the ball joint on 2015 to 2017 Model S and 2016 to 2017 Model X. The investigation identified 426 instances of failure across roughly 75,000 vehicles of those model years.

Before that number alarms you, the context matters. The large majority of failures happened at very low speed, typically while parking, and the investigation found only one minor crash and no injuries. NHTSA closed the case without ordering a recall, but it did recommend that Tesla expand its earlier service bulletin, because that bulletin only covered a narrow band of cars built in early 2016 and didn’t reach about three quarters of the failures NHTSA identified. The agency was also careful to say the closure wasn’t a finding that no defect exists.

So this isn’t a reason to avoid these years, but it’s a reason to pay real attention to the front suspension on them. Listen for clunks, look for any odd wheel position or tire rubbing, and have the fore links and ball joints physically inspected. Ask whether updated components have already been fitted. A Tesla specialist who knows the legacy suspension is far more useful here than a generic inspection that checks tire tread and plugs in a scan tool.

Model X Front Upper Control Arm Creak (2018 to 2020 X)

Less scary, and worth knowing so you don’t overpay for a fix or panic over a noise. Tesla issued a campaign for certain 2018 to 2020 Model X cars where water could reach the front upper control arm ball joint and cause surface corrosion, producing a creak when steering at low speed under load. Tesla classified it as a noise issue that doesn’t cause premature ball joint failure, and the fix was resealing the joint. If you test drive a 2018 to 2020 X and hear creaking from the front while maneuvering, this is likely the culprit, not a sign the car needs a full suspension rebuild.

The MCU1 Blank Screen (cars built before March 2018)

This is the best documented electronic failure on the early cars, and it became a formal recall. Model S and X built before March 2018 use an older media computer with an 8GB memory chip that has a finite number of write cycles. Tesla’s software wrote to it heavily, so the chip wears out, and when it does the center screen can slow, reboot, or go completely blank. Tesla itself acknowledged that essentially all of these units would eventually fail.

Because the screen controls the backup camera, defroster, and other functions, NHTSA treated it as a safety matter, and in early 2021 Tesla recalled roughly 135,000 Model S and X cars, replacing the 8GB chip with a larger 64GB one at no charge. The clean dividing line for buyers is March 2018. Cars built on or after that date use a newer computer and aren’t part of this recall.

On any pre March 2018 car, confirm the recall was performed. And don’t just switch the screen on, use it. Open navigation, scroll menus, check the cameras, run the climate controls, reboot it, and make sure it behaves like a modern touchscreen rather than a decade old tablet gasping for air. Tesla still sells a full infotainment upgrade for these older cars if you want the newer processor, so a car that already has it is worth a bit more to you.

Separately, some legacy Model S and Model X screens can develop a faint yellow border around the display. The condition is cosmetic rather than functional, and Tesla has used an UV light treatment to reduce or eliminate it rather than replacing the screen.

Refresh Era Screen Overheating (2021 to 2022 S and X)

The refresh cars aren’t immune to screen trouble, though theirs is different and less dire. Tesla recalled roughly 130,000 vehicles, including 2021 to 2022 Model S and X along with some 2022 Model 3 and Y, because during fast charging the central computer could fail to cool sufficiently, causing the screen to lag or go blank. This one was fixed with an over the air software update, so a refresh car that’s up to date isn’t carrying the problem. It’s a good example of why “it’s newer” never replaces running the VIN through the recall databases.

Door Handles (2012 to 2020 Model S)

The retractable handles are a Model S signature and a known weak point, but the picture is more nuanced than “early handles are bad.” Tesla revised the handle hardware repeatedly across generations 2.0, 2.1, 2.5, and 3.0, and the later designs can even be retrofitted into older cars. So rather than a model year rule, treat it as a walk around test. Lock, unlock, approach the car, make every handle present, and open every door from inside and out. One replaced handle is nothing. Four neglected ones tell you how the car was cared for. The repairs aren’t catastrophic individually, but they add up.

Model X Falcon Wing Doors (all X, early cars most)

The falcon wing doors are more reliable than their reputation, but they combine powered hinges, latches, ultrasonic sensors, and seals into a complex system that deserves a real inspection rather than a single party trick opening. Cycle each rear door several times from both sides. Watch for hesitation, listen for grinding or unusual motor noise, confirm the obstacle detection stops the door safely, and inspect the seals and headliner for water. Be especially wary of a seller who says a door “sometimes acts up,” because intermittent sensor and electrical faults don’t get cheaper after you own them.

Water Intrusion (Model X in particular)

The X’s complex roof and door openings give water more places to sneak in, and Tesla’s service documentation includes specific sealing procedures for the roof area. Check under the floor mats, in the rear cargo well, and around the headliner edges, and give the closed cabin a sniff. A musty smell warrants investigation even if everything looks dry on a sunny test drive day.

Air Suspension (both, across all eras that have it)

Model S and X air suspension evolved substantially, from an early Continental system on Model S cars built before April 2016, to Tesla’s own hardware after that, to another major revision with Raven in 2019. Air springs, compressors, valve blocks, height sensors, and lines all age. A car that slowly sinks on one corner after sitting isn’t adjusting itself, it has a leak, and left alone the compressor overworks itself into a bigger bill. Inspect an air suspension car twice if you can, once while driving and once after it has sat overnight. And because ride height affects camber, check the inner shoulders of all four tires by hand or from underneath. A tire that looks fine from the side can be worn to the cords on the inner edge, and these are heavy, powerful cars that eat tires when the alignment is off.

The Early Recalls Worth Verifying

Two hardware recalls on early cars are worth confirming as completed, because a properly repaired car isn’t defective just because it appeared on a list. Model S cars built before April 2016 were recalled over power steering assist bolts that could corrode, particularly in road salt climates, potentially reducing power steering assist though manual steering remained. And certain 2016 Model S and X cars were recalled over an electric parking brake whose internal gear could fracture. On any car from these years, confirm the recall work was done rather than assuming the worst.

Brakes (all, especially cold and salted climates)

Because regenerative braking does most of the slowing, the friction brakes get so little exercise they can corrode or seize rather than wear out, especially on cars that live in wet or salted regions and take short trips. Look at the rotor surfaces, not just pad thickness, and make sure braking is smooth and straight. Counterintuitively, a low mileage car that crept around town for years can have worse brakes than a higher mileage car whose systems got regular use. If you own one of these cars, brake firmly now and then to keep everything clean and working.

A note on Plaid brakes. Some 2022 and newer Model S Plaid cars may be equipped with Tesla’s optional carbon ceramic Track Package brakes, a roughly 15,000 to 20,000 dollar option when new that uses carbon silicon carbide rotors to resist fade far better than the standard iron setup. They’re excellent, but they aren’t a set and forget item. Driven hard, especially on a track, carbon ceramic components can wear and the replacement parts are extremely expensive. If an used Plaid has them, treat it as a valuable option worth confirming, and have the rotors and pads inspected for wear or damage before you buy.

Battery Health and the Warranty That Applies to Your Car

The battery is what most shoppers worry about first, and it shouldn’t be the first reason you reject an older car, but it should be investigated properly. The range number on the dash isn’t a lab measurement of pack health, it’s an estimate that shifts with configuration and software, so a modest number doesn’t automatically mean a failing pack. What matters is the actual battery condition, the charging behavior, any alerts, and the repair history. Ask whether the pack has ever been replaced or serviced, because a documented replacement can be a plus. For a broader look at how EV packs age, our guide on how long EV batteries last puts the numbers in context.

Then pin down the warranty on that specific car, because Tesla’s terms shifted more than most buyers realize. Tesla’s current Model S and X Battery and Drive Unit Limited Warranty runs eight years or 150,000 miles with a promise of at least 70 percent capacity retention, and it transfers to later owners as long as the car stays in its region. But that isn’t what earlier cars were sold under. Tesla’s 2015 warranty covered the 60 kWh Model S pack for eight years or 125,000 miles. The 70, 75, 85, 90 and 100 kWh packs across a long stretch of legacy Model S and X production were sold with eight years and unlimited miles on the battery and drive unit itself, and normal capacity degradation was generally not guaranteed. Tesla’s SEC filings were still describing an eight year, unlimited mile Model S and X battery and drive unit warranty as its current terms in 2016 and again in 2018, before the shift to the modern eight year, 150,000 mile, 70 percent structure. So don’t read Tesla’s current warranty page and assume it describes a 2015, or a 2017, or a 2019. The warranty that matters is the one attached to that specific VIN.

By 2026 many early cars are outside their original coverage anyway, which makes a professional battery and high voltage diagnostic more valuable, not less.

The Hardware Question That Now Matters More Than Ever

Mechanical condition is only half the story. Tesla’s driver assistance hardware changed repeatedly, and the hardware installed in the car largely determines what software will run on it, and what the car can do without physical upgrades. This has become the single most important non mechanical factor in 2026.

Tesla has shipped five distinct Autopilot hardware generations across the Model S and X. The chart below is the complete picture in one place, including which FSD (Supervised) software versions each tier is compatible with. Software versions and Tesla’s compatibility statements have shifted repeatedly, so treat this table as accurate as of September 2026 and verify anything mission critical against Tesla’s current release notes and the specific car’s Additional Vehicle Information page.

Here’s the development that reshaped this in 2026. On its first quarter 2026 earnings call, Elon Musk acknowledged that HW3 doesn’t have the capability to achieve the company’s planned unsupervised Full Self-Driving, despite Tesla’s earlier expectation that the hardware would be sufficient. Musk cited substantially lower memory bandwidth than HW4 as the reason. In practical software terms, HW3 cars still receive FSD (Supervised) features. Tesla began delivering FSD v14 Lite to some HW3 (AI3) vehicles in 2026, distilled from the AI4 v14 branch, but at the time of writing this rollout had reached Model 3 and Model Y AI3 cars and not the Model S or Model X. HW3 also can’t run planned unsupervised (eyes off) FSD at all.

One more detail that matters for anyone weighing the future of an HW3 car. When Tesla laid out the upgrade path, it said the conversion to HW4 requires replacing both the computer and the cameras. AI3 isn’t just compute limited relative to AI4. The camera hardware also has to change for the planned unsupervised system. That’s a real cost and complexity signal for an used buyer, because it means an HW3 to HW4 conversion isn’t a chip swap. It’s a broader vehicle hardware change.

As of September 2026, Tesla doesn’t offer a generally bookable HW3 to HW4 retrofit program through its consumer support channels, and I can’t tell you when it might arrive or whether it will materialize as described. So the practical takeaway is blunt. Buy an HW3 car for what it can do today, and don’t pay a premium on the belief that it will someday drive itself unsupervised, because Tesla has said the existing hardware can’t.

Regardless of what the model year suggests, always verify the actual computer in the car. Open Controls, then Software, then Additional Vehicle Information, and read the Autopilot or AI Computer line. This matters more than it used to. A 2018 Model S that left Fremont with HW2.5 may today contain HW3 via the retrofit. A 2020 in theory has HW3 but should still be confirmed on the car. Never accept “it has FSD hardware” as an answer. You want to know which hardware.

The Free Supercharging Trap

Few things get misadvertised on used Tesla listings more than free supercharging. You’ll see listing after listing claiming it, and for most of those cars it won’t carry to you. Only the earliest cars, generally those ordered before mid January 2017, had the version of free supercharging that was linked to the car itself and could pass to a new owner. Many later promotions tied the benefit to an owner rather than permanently to the vehicle, so it often dies at sale. And there are well documented cases in the used market where an early car lost the perk along the way, so the age of the car alone doesn’t reliably tell you what you get. The rule that never fails you is this. Don’t assign any value to transferable free supercharging until the exact VIN and its benefit have been verified.

Seeing free supercharging in the seller’s Tesla account confirms the current owner has the benefit, but it doesn’t by itself prove the benefit will survive an ownership transfer. Vehicle linked and owner linked free supercharging can look identical in the app while behaving very differently at sale. Treat transferable free supercharging as unverified until you have vehicle specific evidence that the benefit is attached to the car itself, not the current owner. If a seller can’t demonstrate it in the account at all, treat the advertised “free supercharging” as an unverified claim rather than a feature you’re paying for.

There’s a separate and more serious concern than the free supercharging question. Tesla has been known to disable Supercharger access entirely on certain cars, most commonly those with salvage or rebuilt titles, but occasionally on other cars flagged in Tesla’s system. A car locked out of the Supercharger network still charges fine on any J1772 or NACS compatible third party charger, but it loses the one thing that makes Tesla road trips work. Verify that the specific car can start a session at a Supercharger before you commit, and be especially careful with any Tesla whose title is anything other than clean.

Refresh Cars Fixed the Old Problems and Added a Few New Ones

The 2021 refresh was far more than a horizontal screen and a yoke. These are a substantially newer generation that sheds most of the reasons to worry about the earliest cars, and I consider them materially lower risk overall. That doesn’t make them perfect. Beyond the fast charging screen recall already mentioned, the refresh era has seen software based recalls involving window reversal behavior and door lock function, and a physical inspection recall covering front seat belt anchor connections on some 2021 to 2023 cars. There have also been persistent owner reports of an acceleration vibration on some refresh cars similar in feel to the older halfshaft shudder. None of this makes the refresh cars unreliable, they remain the lowest risk choice. It’s just a reminder that newer doesn’t mean recall free.

Verify Every Open Recall Before You Sign

Beyond the specific issues covered above, run the full VIN through both Tesla’s support site and NHTSA’s recall search at nhtsa.gov/recalls. Both show open campaigns. If either shows one, get it closed before the sale, or at the very least before you write the check. A properly closed recall is what separates a documented used Tesla from a gamble.

Don’t Assume the Low Mileage Early Car Is the Better Buy

Picture two listings. A 2015 P85D with 48,000 miles, and a 2020 Long Range with 88,000 miles. The 2015 looks like the cream puff. But depending on its history it may bring an older screen computer, dated Autopilot hardware, early suspension components, and a Performance Large Drive Unit that deserves a coolant intrusion inspection. The 2020 may bring later suspension, Raven drivetrain updates, HW3, and years of accumulated component revisions. Mileage still matters. It just doesn’t tell the whole story, and on a Tesla it often tells less of it than the year and configuration do.

My Risk Map by Production Era

These aren’t reliability grades in the Consumer Reports sense. They’re how I’d allocate inspection effort and how much repair reserve I’d set aside.

A fully sorted 2016 can beat a neglected 2021. These are inspection priorities, not verdicts.

Your Pre Purchase Checklist

Run the test drive with the radio off. Take it over rough pavement and listen. Make full lock turns both ways. Accelerate hard enough to load the drivetrain, then brake firmly. Run the climate system, then turn it off and listen again. Park, get out, and operate everything. Then look the car over one more time. A Tesla can hide a lot behind an immaculate screen and brutal acceleration. While you’re in the car, open Controls and then Service. Any active alerts, warnings, or open service notifications show up there, and they often tell you more than a seller will.

For the general framework of vetting any used EV, our how to buy an used EV guide is a good companion to this Tesla specific checklist.

The Cars I’d Personally Target

If I wanted the classic vertical screen Model S without the earliest car’s baggage, I’d start with a well documented 2019 or 2020 Raven Long Range. That’s my favorite intersection of depreciation, mechanical maturity, range, and modern hardware. For the Model X, I’d likewise favor the later Raven Long Range cars over an early 2016 or 2017 unless that older car came with an unusually complete service history and a compelling price. If I could spend more, I’d move to a 2022 refresh, more mature than the first year cars and much further from the legacy problems. And if driver assistance mattered most to me, I’d hold out for a 2023 or newer car with AI4 physically confirmed on the screen rather than assumed from the year.

Where would I be most cautious? An early Performance Model S or early Model X with little repair documentation, original major components, and a seller who can’t tell me anything about the drive unit, screen, or suspension history. A low price doesn’t compensate for buying blind.

The Bottom Line

The used Model S and Model X market is full of real bargains, and full of cars that look nearly identical while carrying very different hardware underneath. That’s why I wouldn’t tell anyone to just “buy a 2018” or “avoid everything before 2021.” The production history is too layered for a shortcut like that.

The oldest cars carry the most age related exposure. The applicable Large Drive Units deserve a coolant leak inspection. Pre March 2018 cars need their screen recall confirmed. The 2015 to 2017 S and 2016 to 2017 X deserve extra suspension scrutiny. Dual motor legacy cars should be tested for halfshaft shudder. Early X buyers should treat the falcon wing doors as a mechanical system to inspect, not a trick to show off once. And the hardware layer now matters as much as any of it, because Tesla’s 2026 acknowledgment that HW3 won’t support its planned unsupervised driving splits the used fleet into two tiers in a way that wasn’t true a year ago.

None of that makes these bad cars. It makes them cars that reward a buyer who does the homework. Buy the history. Buy the hardware. Then look at the mileage. Do it in that order and an used Model S or X will still feel extraordinarily modern for what it costs. Do it in the wrong order and you may learn, quickly and expensively, that depreciation doesn’t make sophisticated engineering cheap to repair.

For the version of this discussion that covers every Tesla, see our complete guide to buying an used Tesla, which covers the Model 3 and Model Y alongside the S and X.