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Which Tesla Is Right for You?

Seven quick questions across the whole lineup, new and used. We sort out the trims, the battery chemistries, and the Hardware 3 vs 4 question, then hand you your best-fit Tesla with the trade-offs spelled out. Total beginner? Good. Every term gets explained.

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New vs used: the Tesla math is unusual

Tesla depreciation runs hot, and the late-2025 Standard trims pushed used prices down another notch. The result: a clean 2019–2021 Model 3 costs about half of a new Standard, gets the same Supercharger network, and keeps whatever remains of its 8-year battery and drive-unit warranty. What the used car can't get you is Hardware 4 or the refreshed interiors. That's the whole trade in one sentence: used buys the Tesla experience, new buys the Tesla future. (And for the Model S or X, used is now the only door — Tesla ended their production in early 2026.)

Hardware 3 vs Hardware 4, in plain English

Every modern Tesla — spring 2019 onward — left the factory with the FSD computer, in one of two generations. Earlier cars (2016 to early 2019) shipped with HW2/2.5, which can't run FSD as-built — though many got free HW3 retrofits when their owners bought FSD, and Tesla still sells the computer upgrade. On a used 2017–2018 car, check which computer is actually installed rather than assuming from the year. Model S, X, and Y switched to HW4 during 2023; the Model 3 got it with the Highland refresh. HW3 cars run today's Autopilot and FSD features fine — one of us daily-drives a 2019 HW3 car happily — but Tesla's new FSD development explicitly targets HW4, and the company has been vague about HW3's long-term ceiling. The practical rule: if FSD is a must-have for you, buy HW4. If it's a curiosity, HW3 at a discount is the better deal.

LFP vs nickel: two batteries, two habit sets

Here's the part US buyers get wrong: LFP (lithium iron phosphate) packs mostly live in 2021–2022 Model 3 RWD/SR+ cars — imported packs from that window. Those want charging to 100% daily; Tesla's own manual recommends a full charge at least weekly. Everything else US-built, including the new Standard trims, runs nickel cells: set the daily limit to 80% and save 100% for road-trip mornings. Neither is a defect. The quiz tags each pick with its battery habit, and either way the care rules fit on a sticky note.

The FSD money question

Since early 2026, FSD (Supervised) is subscription-only at $99/month — Tesla no longer sells it outright. That changes used-car math: a used Tesla whose first owner bought FSD outright, and which survived a private-party sale, carries software you literally cannot buy anymore. Verify it on the car's screen under Software → Additional Vehicle Information, never from the listing. And our referral link currently gets you three months of it free to decide whether it's worth $99 to you (it also appears with your quiz results).

Frequently asked questions

Should I buy a new or used Tesla in 2026?

Used Teslas are the best-value cars in the brand: 2019–2023 Model 3s start around $19,000 with full Supercharger access, and the 8-year battery/drive-unit warranty transfers. Buy new if you want Hardware 4, the refreshed interiors, or the cheaper Standard trims — which have squeezed used prices to historic lows.

What is the difference between Tesla Hardware 3 and Hardware 4?

HW3 and HW4 are the self-driving computer generations. Model S, X, and Y switched to HW4 during 2023; the Model 3 got it with the Highland refresh (2024 in the US). HW3 handles today's features fine, but new FSD development targets HW4 — so if FSD matters to you, buy an HW4 car and don't pay extra for FSD promises on an HW3 one.

LFP vs nickel battery in a Tesla — which is better?

Neither is "better," they just want different habits. In the US, LFP packs appear mainly in 2021–2022 Model 3 RWD/SR+ cars — those are happy charging to 100% daily, and Tesla's manual recommends a weekly full charge. Everything else US-built, including the new Standard trims, uses nickel (NCA/NMC) cells: set an 80% daily limit and save 100% for road trips.

Does FSD transfer when you buy a used Tesla?

If the first owner bought Full Self-Driving outright, it usually stays with the car in a private-party sale — but cars resold through Tesla or auctions often lose it. Verify on the car's own software screen, never the listing. Since Tesla ended one-time FSD purchases in early 2026 (it's now $99/month), a used car with genuine legacy FSD is worth a premium.

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