A lawsuit says that the Subaru WRX suffers from sudden engine failure due to piston detonation, a well-known cause of damage to the piston and piston ringlands. The proposed class-action includes all current and former owners or lessees of the 2009-2018 Subaru Impreza WRX and WRX STI.
Subaru allegedly knew WRX and WRX STI components were defective in engines coded EJ255, EJ257 and FA20. The plaintiffs say engines should last at least 120,000 miles but the Subaru engines may last just half that time before they fail.
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