Rear Oxygen Sensor GRB 22056AA210 and other rubber components

and other rubber components

BRZ w/ Brembo Brakes

For this reason

26449VA022 (Replaces 26449VA020 and 26449VA021)

enhanced grip and traction

Rear Oxygen Sensor GRB 22056AA210 and other rubber componentsThis sensor measures the oxygen content in the exhaust system post catalyst. An oxygen sensor can establish the air fuel ratio by measuring the excess oxygen left over from the combustion process. The ECU compares the rear oxygen sensor signal to the front oxygen sensor signal to determine if the catalytic converter is operating efficiently. A faulty rear O2 sensor is likely to set a CEL but is unlikely to affect the engine operation. Manufacturer