Almost every new electric car carries the same headline warranty
Nearly every electric car sold today comes with a battery warranty that reads the same from a distance, 8 years and around 100,000 miles. The United States Department of Energy, a federal agency with no vehicle to sell, states plainly that many manufacturers offer that exact term. Recurrent, a company that tracks electric vehicle data and is not itself a carmaker, built a table comparing 16 named brands and found most match it. A handful extend the term to 10 years, Vinfast on an unlimited mileage warranty, Mercedes on its EQE and EQS models, and Hyundai, Kia and Genesis across their lineups.
The number that decides whether a worn battery gets fixed for free
Years and miles are not what decides whether a manufacturer repairs a worn battery at no cost. That decision rests on the capacity guarantee, the share of a battery original capacity it must still hold before the warranty stops covering it. Recurrent own comparison table shows 10 of the 16 named brands, including Tesla, Hyundai, Rivian, BMW, Audi, Ford and Volkswagen, set that floor at 70%, meaning the manufacturer owes the owner nothing until the pack has lost more than 30% of what it left the factory with. 5 brands, Chevrolet, Nissan, Honda, Lexus and Cadillac, act sooner, once the pack falls below 75%, a more protective term hiding inside a warranty that otherwise reads identically to its 70% competitors. Vinfast lists no capacity guarantee at all, so its unlimited mile, 10 year warranty covers the vehicle but, by Recurrent reported terms, does not guarantee the battery holds any particular amount of charge.
These 5 are a representative selection from a 16 brand table. A higher bar means the warranty acts sooner, after less capacity is lost.
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| Tesla | 70 |
| Hyundai Kia Genesis | 70 |
| Rivian | 70 |
| Chevrolet | 75 |
| Honda | 75 |
The miles behind the years vary more than the years do
The mileage figure attached to that headline term spreads wider than the years do. Mercedes covers its EQE and EQS to 155,000 miles. Rivian states a range running as high as 175,000 miles. Tesla covers its Model X, Model S and Cybertruck to 150,000 miles, and its Model 3 or Model Y up to 120,000 miles. Hyundai, Kia, Genesis, Chevrolet, Nissan, Honda, Lexus and Cadillac all stop at 100,000 miles. A peer reviewed study from the Catalonia Institute for Energy Research and the Universitat Politecnica de Catalunya notes that the industry generally treats a battery as no longer fit for its original vehicle once its capacity has faded to somewhere between 70% and 80%, the same range most of these warranties are built around, and the same paper states that battery warranties have been extending over time as manufacturers grow more confident in how long their packs last.
Rivian and the Tesla Model 3 or Model Y are stated by the source as ranges rather than single figures. This chart uses the upper end of each stated range.
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| Mercedes, EQE and EQS | 155,000 |
| Rivian, upper end of its stated range | 175,000 |
| Tesla, Model X, Model S, Cybertruck | 150,000 |
| Tesla, Model 3 or Model Y, upper end of its stated range | 120,000 |
| Hyundai, Kia, Genesis | 100,000 |
| Chevrolet, Nissan, Honda, Lexus, Cadillac | 100,000 |
What happens once the warranty runs out
Recurrent puts the cost of an out of warranty battery replacement at 5,000 to 16,000 dollars, which is why the capacity guarantee is not a small detail buried in a contract. A buyer who wants coverage after the factory term ends can pay for an extended plan, AmberCare for Tesla vehicles starting at 60 dollars a month, or XCare from Xcelerate Auto, which only covers a battery under 7 years old and under 100,000 miles. Brent Seavey, Vice President of Business Development at Xcelerate Auto, said this.
Although EV battery failures are rare, when they do occur they can be devastating for your finances.
Brent Seavey, Vice President of Business Development at Xcelerate Auto, an extended warranty seller. Source 4.
Most warranties exclude commercial use and accident damage, and BGR reports that Tesla specifically voids coverage for using a non standard charger, unauthorized modifications, a skipped software update, or using the vehicle battery as a home power source.