How does an O2 Spacer work? O2 spacer extends the gap between the o2 sensor and the exhaust gases, with an increased gap, it will provide a lower Co2 reading. ... However, 90% of the time they will work provided the original o2 sensor is not faulty.

What does a 02 sensor spacer do?

The spacer puts the O2 sensor out of the exhaust flow. This tricks the ECU into thinking that the cat is working when you don't have one or have a high flow one.

Are O2 sensor spacers universal?

Oxygen sensor spacer, universal fitment for most vehicles with the M18*1.5 O2 sensor hole. It spaces the oxygen sensor located after the catalytic converter out of the flow of exhaust gases.