Subaru OEM Front 02 Sensor (08-11 STi)
Item # 22641AA510
$199.95
This Subaru OEM sensor is commonly referred to with two names: Front 02 sensor, and Front Air Fuel Ratio sensor. However you want to call it, this sensor needs to be working properly at all times. If you're getting any of the P0132-P0133 codes its likely your Front sensor is bad.
*This sensor is only for the manual transmission model
Comments
P0134 Oxygen (A/F) Sensor Circuit No Activity Detected
Also if you get a P0134 Oxygen (A/F) Sensor Circuit No Activity Detected Bank 1 Sensor 1 code it means the sensor is dead as a door nail.