Lambda Oxygen O2 Sensor 234-4706 for Subaru Forester, Impreza 1999-2004

Lambda Oxygen O2 Sensor 234-4706 for Subaru Forester, Impreza 1999-2004

The Lambda Oxygen O2 Sensor 234-4706 is a reliable aftermarket replacement crafted for Subaru Forester and Impreza models from 1999 to 2004. This heating-type sensor with a piezoelectric sensing element delivers accurate oxygen readings to the engine control unit, helping to keep the air-fuel ratio balanced, improve throttle response, and support cleaner emissions. It matches key OEM numbers (234-4706 and 22690-AA420/AA540/AA640) for confident compatibility and a straightforward replacement.

Benefits & Tips

• Improved fuel efficiency and smoother idle by providing precise lambda readings to the ECU.
• Quicker warm-up due to the heating element, delivering stable performance sooner after startup.
• Easy replacement for Subaru Forester 1999-2004 and Subaru Impreza 1999-2004 with verified OEM numbers.

Product specifications

• Brand Name: IWOKPHD
• Part Numbers / OEM numbers: 234-4706; 22690-AA420; 22690-AA540; 22690-AA640
• Sensor Type: Piezoelectric
• Type: Heating
• Application: For SUBARU FORESTER 1999-2004; For SUBARU IMPREZA 1999-2004
• Origin: Mainland China
• Warranty: 2 years (Replacement Warranty)
• Package Include: 1 pcs

Package includes

• 1 piece
• Compatible with Subaru Forester 1999-2004 and Subaru Impreza 1999-2004

Warnings / Reminders

• Please check the picture and the part number carefully to ensure you bought the right part for your car.
• If you cannot determine which item fits your car, please send the Part Number or the original product photos to us to confirm before order.
• The only way to be 100% sure the part fits your vehicle is to check your original part. We will check for you and reply within 24 hours.

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