Every conversation about buying a used electric car arrives at the same place: what if the battery goes? It is the right question, and it has a better answer than most buyers expect. The answer has three parts — what a pack costs, what the warranty already covers, and how often a pack actually fails — and only the first part is frightening on its own.
What a pack costs
A replacement battery pack, fitted by a dealer, costs somewhere between 5,000 and 20,000 dollars depending on the car. A Nissan Leaf's 40 kWh pack is at the low end; a long-range Tesla Model S or a large SUV pack is at the high end. Those figures are for a complete new pack at retail. Two things make the real-world number lower for many owners. The first is that a pack is made of modules, and a fault in one module can often be repaired by replacing that module rather than the pack — a job that independent specialists now do for a fraction of the dealer price. The second is that the price of cells has fallen by roughly ninety per cent since 2010, so a pack replaced in 2028 will cost less than the same pack priced today. MotorJury shows a replacement-cost range on every electric model-year page, drawn from manufacturer parts pricing and reported repair invoices, labelled as an estimate.
What the warranty covers
Every electric car sold in the United States since about 2013 carries a federal-mandated battery warranty of at least eight years or 100,000 miles. California and the states that follow its rules require ten years or 150,000 miles on cars sold from 2026. Most manufacturers also guarantee a minimum capacity — usually seventy per cent — for the warranty period, and will replace or repair a pack that falls below it. The warranty transfers with the car. A 2019 electric car bought used in 2026 has at least a year of coverage left, often more, and a car under warranty with a degraded pack is the manufacturer's problem.
Recalls are separate from the warranty and can be more valuable. The 2017 to 2022 Chevrolet Bolt had every pack replaced under a recall for fire risk, which means a used Bolt today may have a newer battery than a used car of any other kind. The 2011 to 2015 Nissan Leaf, by contrast, had no such recall and its early packs — which lacked active cooling — degraded fastest of any electric car sold at volume. The Leaf is the reason the fear exists; the Bolt is the reason it is often misplaced.
How often it happens
The evidence from fleet data, from insurers and from the manufacturers' own warranty claims points the same way: outside the early Leaf, outright battery failure in the first ten years is rare — well under two per cent of cars for most models, and lower still for those with liquid cooling. Degradation is a different thing from failure. A typical pack loses between one and two per cent of capacity a year, faster in the first two years and in hot climates, and slower afterward. A ten-year-old car with eighty-five per cent of its original range is normal, not broken.
What that means for a purchase
Three checks tell you nearly everything. First, the state of health: most cars will display it, or a dealer or an independent can read it from the diagnostic port, and a figure above ninety per cent on a car under five years old is good. Second, the warranty status by VIN, including the in-service date the clock runs from. Third, the recall status at nhtsa.gov/recalls — a car with a completed pack recall is a better car than one without, and a car with an outstanding one should not be bought until it is done. Then compare the replacement-cost range on the model page with the price of the car; if the worst case is less than a third of the purchase price and the warranty runs for another two years, the question has been answered.
The hybrids
Hybrid batteries are smaller, cheaper — a Toyota Prius pack is roughly 2,000 to 3,500 dollars fitted, and reconditioned packs are cheaper — and covered by the same eight-year federal warranty (ten years and 150,000 miles on Toyota hybrids from 2020). Prius packs from the second and third generation commonly last fifteen years and 200,000 miles; failure shows as a check-hybrid-system warning and a sudden drop in fuel economy, and it is a same-day repair.
Summary
Read the state of health and the warranty date before the price. Prefer a car whose pack has been replaced under recall to one whose pack is original. Treat the replacement-cost figure on the model page as the worst case, and the warranty as the reason it is rarely yours to pay.