Subaru WRX Downstream Oxygen (O2) Sensor
$129.99
The downstream oxygen sensor sits after the catalytic converter and checks how efficiently the cat is scrubbing emissions. When it degrades, you'll often see a check engine light for catalyst efficiency, or a slight dip in overall drivability.
Designed to match the Subaru WRX 2.0L Turbo FA20 engine layout, this sensor installs in the factory downstream location with the correct thread pitch and connector for a straightforward swap.
Made to OEM-equivalent standards, it delivers reliable post-catalyst readings so your emissions system and ECU stay in sync.
Reference: OE/interchange WALKER
Quantity
New
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