Subaru WRX Upstream Oxygen (O2) Sensor
$169.99
This upstream oxygen (O2) sensor monitors exhaust gas oxygen levels right after the turbo, feeding real-time data to your engine control unit so it can fine-tune the air-fuel mixture. A failing upstream sensor typically shows up as rough idle, poor fuel economy, hesitation under boost, or a check engine light.
Engineered to fit the Subaru WRX with the 2.0L Turbo FA20 engine, this sensor mounts in the factory upstream position for a direct bolt-in replacement with no modification required.
Built to OEM specifications with a durable zirconia sensing element and connector, it restores accurate fuel trim control and helps your FA20 run cleanly and efficiently.
Reference: OE/interchange WALKER
Quantity
New
Happy Humbl Customers
What they’re saying
"The socket set is top-tier quality. Heavy-duty steel that handles real torque without slipping. Better than the big box store brands honestly."
Jason M., Ohio
Ordered brake pads and rotors for my truck. Everything fit perfectly right out of the box. Saved me cash and shipping was surprisingly fast."
Isaac L., Texas
"Incredible service. Needed a specific sensor fast and it arrived a day early. The site is simple to use. Finally found a reliable parts source!"
Mike T., Florida
