Subaru OEM Rear Oxygen Sensor Subaru WRX STi 2002-2007 | 22690AA520 Vehicle Make_Audi Kicks up minimal brake dust

Kicks up minimal brake dust and runs whisper quite during normal driving conditions

Compression/Rebound adjustable 7

S-type Attachment

Smooth Mandrel Bends

Outside Diameter 3 in (76 mm)

Subaru OEM Rear Oxygen Sensor Subaru WRX STi 2002-2007 | 22690AA520 Vehicle Make_Audi Kicks up minimal brake dustFor your: Subaru STi 2004 2007 Subaru WRX 2002 2007 Rear O2 Sensor The rear oxygen sensor is used to sense oxygen concentration in the exhaust gas. If the air fuel ratio is leaner than the stoichiometric ratio in the mixture (i. e., excessive amount of air), the exhaust gas contains more oxygen. To the contrary, if the fuel ratio is richer than the stoichiometric ratio, the exhaust gas contains almost no oxygen. Detecting the oxygen concentration in