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Hybrid Battery Test

By manufacturer

Who actually
wrote a number

The useful question is not how many years. It is whether the carmaker wrote a capacity percentage into its own terms at all, and several did not.

At a glance

  • Tesla and Kia write 70 percent into the warranty itself
  • Nissan writes no percentage anywhere. Five booklets searched end to end. The Leaf threshold is bars on a gauge
  • The Bolt's 60 percent could not be confirmed on any GM page. Every source offering it was a content farm
  • Hyundai does not halve battery cover for a second owner. That belief comes from the gasoline powertrain warranty

The five that could be checked

The seven that could not

  • Ford Mustang Mach-E
  • Volkswagen ID.4
  • BMW i3
  • Audi e-tron and Q8 e-tron
  • Polestar 2
  • Rivian R1T
  • Toyota bZ4X

No term, no threshold and no transfer status could be obtained from a manufacturer source for these seven. The blockers were network level rather than research level, since several of these carmakers refuse automated access outright and two render their warranty guides only in the browser. The Toyota figure in particular, commonly quoted as ten years and 150,000 miles with conditions attached, is exactly the kind of claim this site will not repeat without reading it.

Questions people actually ask

Is 70 percent the industry standard threshold
It is written into Tesla's and Kia's own terms and appears on Hyundai's site. It is not universal. Nissan states no percentage at all, and the figure commonly quoted for the Chevrolet Bolt could not be confirmed at any source GM owns.
Does a battery warranty transfer to the second owner
Tesla's is explicitly transferable at no cost. Nissan's is provided to original and subsequent owners. Hyundai gives a subsequent owner the same ten years and hundred thousand miles. Kia's page does not say either way for the battery, so this site does not claim an answer.

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