Subaru Forester 2.5L Oxygen Sensor 22641-AA360 / 234-4445, Directly Replaces 234-9123

Subaru Forester 2.5L oxygen sensor (OEM: 22641-AA360/234-4445) designed for 2009-2013 Forester 2.5L and also compatible with Outback, Liberty of same displacement. Real-time monitoring of exhaust oxygen content and feedback to ECU; optimize air-fuel ratio to improve combustion efficiency and reduce emissions. Direct replacement for OEM 234-9123; use a dedicated socket tool to avoid damaging threads or wiring. KLP brand provides stable performance; standard-spec parts are suitable.