According to Carscoops, recent lawsuits in the U.S. allege that certain Honda models equipped with 1.5L and 2.0L i-VTEC engines may face severe issues.

Plaintiffs claim these engines struggle to withstand high compression ratios and temperatures, leading to overheating, damaged head gaskets, and potential long-term damage for owners.

One allegation highlights that the head gaskets in these 4-cylinder engines are prone to cracking. This allows coolant to seep into cylinder head grooves. Plaintiffs argue that coolant loss can cause engine overheating, seizing, or even fire in extreme cases.

Owners also report observing white smoke from the exhaust, potentially indicating coolant leaking into pistons and burning.

Coolant mixing with engine oil can further lead to internal corrosion. Plaintiffs allege Honda has refused repairs or replacements for affected i-VTEC engines, even under warranty.

The class-action lawsuit states that such engines are expected to last at least 200,000 miles (approximately 322,000 km). However, U.S. customers claim this is not the case, and engine lifespans are significantly shortened.

The lawsuit covers Honda Accord (2018-2022), Honda Civic (2016-2022), Honda CR-V (2017-2022), Acura RDX (2021-2022), and Acura TLX (2019-2022). Plaintiffs accuse Honda of warranty breaches, unjust enrichment, and violations of consumer protection laws.

Carscoops notes this isn’t the first class-action lawsuit against Honda’s 1.5L i-VTEC engine. In 2024, a California lawsuit claimed inadequate sealing and cooling systems could cause coolant leaks, oil contamination, overheating, and power loss.

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