Hyundai announced hybrid battery lifetime warranty about a month ago without much details, here's an article that mention those details with the warranty.
When we reported last month on Hyundai’s precedent-setting “lifetime” warranty on the battery pack for the 2012 Sonata hybrid, official details had not been made available, and our post’s comments section quickly filled up with speculation regarding the specifics of the coverage.
Hyundai recently set the record straight: “The Hyundai Lifetime Hybrid Battery Replacement Guarantee ensures that if the 2012 Sonata hybrid lithium-polymer battery fails, Hyundai will replace the battery and cover recycling costs for the old battery pack free of charge to the original owner. The coverage is not transferable, and does not apply to lease and commercial vehicles or vehicles serviced outside the U.S.”
The integrated hardware, software, and controllers are not included in the lifetime battery warranty; they are instead covered by the vehicle’s 10-year/100,000-mile powertrain warranty.
On the ostensibly rare occasion where an original owner faces what could be a hefty repair bill for components damaged by a catastrophic battery failure after Hyundai’s generous powertrain warranty has expired, they’ll likely want to consider mileage, residual value, and the overall condition of the vehicle before writing a check. That’s just common sense.