M18x1.5 O2 Sensor Spacer - Stainless Steel Oxygen Sensor Extender Adapter for Universal Car - Lambda Sensor Filter Spacer

With the engine warning light coming on periodically, (following an OBD2 scan) it became clear that I was having problems with my catalytic converter. After fitting this device to the downstream O2 sensor the engine warning light stayed off, (and with the use of a catalytic cleaner) allowed me to pass the MoT test. Well worth the money !

Works well

Troublesome Cat low efficiency eml code sorted

This oxygen sensor extender seems well made, strong, with good clean threads and no sharp edges or burrs from manufactiring. I haven't actually installed this yet but they work by removing the downstream oxygen sensor from the flow of gasses therefore causing the sensor to have a decreased reading and fooling the ECU into thinking all is good with the emissions control system and turning off the emissions light. A handy temporary measure if needed to get the engine light off on your dash until you get the problem fixed.

It worked perfectly on the downpipe. However, it completely destroyed the threads on my manifold. I can't drive the car until the manifold is repaired.

Product is good, very good

Great 👍

Sorted a problem with ease