Milltek Cat O2 Sensor Spacer 90 Degree MINI

Product Description

This O2 spacer from Milltek for the MINI Cooper has a mini catalyst substrate that separates the Oxygen sensor from the exhaust gas stream.

When an aftermarket high-flow catalytic converter is used on a late model car its common to see a CEL (Check Engine Light) come and go. This CEL is usually backed by a fault code that indicates a failed cat. Behind the scenes, the factory ECU is comparing the readings from a pair of oxygen sensors to measure the effectiveness of the cat. When a high-flow cat is used the exhaust gases are able to pass by the cat at a much faster rate, disrupting the readings.

Our O2 sensor spacer retracts the second oxygen sensor from the direct flow of gases, restoring the balance that the ECU requires when using a high-flow cat.