Review on Denso 234-9123 Oxygen Sensor: Reliable Air and Fuel Ratio Monitoring Device by Jessie Ritchie
Fits 2006 Forester 2.5
Good news, fits 2006 Forester 2.5 2006. Some other reviewers have said that replacing the front O2 sensor can improve fuel economy and that they "wear out". Well after 6 months I can report absolutely no change in fuel economy, handling or fuel trim. The original seemed good even after 140,000 miles. So I really didn't have to spend $70.
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