Honda is extending head gasket warranty coverage for a large number of vehicles equipped with certain 1.5-liter turbo and 2.0-liter hybrid engines after reports of premature head gasket failures. The coverage includes popular models such as the Civic, Accord and CR-V, but the move is not a recall, and some older vehicles will have coverage only until May 31, 2027.

Honda Extends Head Gasket Warranty

The extended head gasket warranty will provide coverage for up to 10 years or 150,000 miles on most affected vehicles. That is substantially longer than Honda’s standard five-year/60,000-mile powertrain warranty and Acura’s six-year/70,000-mile powertrain warranty, according to Car Complaints.

The warranty extension follows multiple reports of original head gasket failures involving Honda and Acura vehicles. A failed head gasket can result in leaking coolant, overheating and misfires, while vehicles may also store diagnostic trouble codes ranging from P0300 to P0304.

Vehicles Covered by the Warranty Extension

• 2018-2022 Honda Accord 1.5T (CVT) (Bulletin 26-003)
• 2018-2022 Honda Accord 1.5T (M/T) (Bulletin 26-004)
• 2023-2026 Honda Accord Bulletin (Bulletin 26-005)
• 2018-2022 Honda Accord Hybrid (Bulletin 26-006)
• 2023-2026 Honda Accord Hybrid (Bulletin 26-007)
• 2016-2021 Honda Civic 1.5T (CVT) (Bulletin 26-008)
• 2016-2021 Honda Civic 1.5T (M/T), 2017-20 Civic Si (Bulletin 26-009)
• 2022-2026 Honda Civic 1.5T (M/T) & Civic Si (Bulletin 26-010)
• 2022-2024 Honda Civic 1.5T (CVT) (Bulletin 26-011)
• 2025-2026 Honda Civic 2.0 (CVT) (Bulletin 26-012)
• 2025-2026 Honda Civic Hybrid (Bulletin 26-013)
• 2017-2022 Honda CR-V 1.5T (Bulletin 26-016)
• 2023-2026 Honda CR-V 1.5T (Bulletin 26-017)
• 2020-2022 Honda CR-V Hybrid (Bulletin 26-018)
• 2023-2026 Honda CR-V Hybrid (Bulletin 26-019)
• 2016-2017 Honda Civic 1.5T (CVT) (Bulletin 26-099) Expires May 31, 2027
• 2016-2017 Honda Civic 1.5T (M/T), 2017 Civic Si (Bulletin 26-097) Expires May 31, 2027
• 2017 Honda CR-V 1.5T (Bulletin 26-098) Expires May 31, 2027
• 2025-2026 Acura ADX (Bulletin 26-001)
• 2023-2026 Acura Integra (CVT) (Bulletin 26-002)
• 2023-2026 Acura Integra (M/T) (Bulletin 26-003)

For older vehicles that do not qualify for the warranty extension, Honda will provide a six-month grace period from the date owners are notified. Dealers have been instructed to replace the cylinder head gasket when coolant is leaking into the combustion chamber. If warping is observed, the cylinder head or engine short block should be replaced.

Some Older Models Have Limited Coverage

The affected vehicle list includes the current CR-V, identified in the source as the best-selling SUV in the U.S. in 2026. The Accord and Civic are also described as two of the most popular sedans in the country.

However, three groups of older vehicles have warranty extensions that expire on May 31, 2027. That includes the 2016-2017 Civic 1.5T with a CVT, the 2016-2017 Civic 1.5T with a manual transmission and 2017 Civic Si, and the 2017 CR-V 1.5T.

Head Gasket Repairs Could Reach $10,000

Reports of head gasket failures can be found online through Car Complaints and the National Highway Traffic Safety Administration website. Car Complaints lists a typical repair cost of $2,890 for the 2017 Honda CR-V, with an average mileage of 85,000 miles.

Several repair estimates were higher than $5,000. One owner of a 2017 CR-V in Massachusetts was quoted between $8,000 and $10,000 to replace the head gasket and turbo charge unit. Another owner was quoted $6,000 to repair a CR-V with less than 60,000 miles.

Despite the reported head gasket failures, no recall has been issued. Owners of older Honda and Acura vehicles could see their extended coverage expire within the next few months, potentially leaving them responsible for repair costs if the head gasket fails.

What Honda and Acura Owners Should Know

Owners of affected vehicles are advised to regularly check coolant levels, never ignore an overheating warning, and change the oil at or before the recommended interval.

Honda owners seeking more information about the warranty extension can contact Honda customer service at 888-234-2138.

Honda Faces Reliability Concerns

The mechanical failures could affect Honda’s otherwise strong reliability reputation. The source notes that potentially hundreds of thousands of Honda and Acura models could have affected engines, although the true number is unknown unless the automaker issues a recall.

The warranty extension provides additional coverage for affected owners, but concerns remain about vehicles that eventually fall outside the coverage period. The source also notes that it is unclear whether replacement gaskets address the underlying cause of the failures.

The situation carries a potential reputational risk for Honda similar to the damage faced by Kia and Hyundai after years of dealing with Theta II engine connecting rod bearing failures.