i need one for a 1988 rx7 13b. Where from? any people in the UK would be helpfull, but worldwide generally...

 

And O2 sensor is an O2 sensor is an O2 sensor...
In general, they are all the same - 18mm x 1.5 threads at the base.
The only part that changes is the connector.

In the U.S., Bosch is a popular brand that makes generic O2 sensors.
We just need to crimp the proper (female spade?) connector on the bare wire end to mate with the harness.

This is the cheapest option.

The Mazda OEM replacement is like US$100!
Bosch universals are like US$30.


-Ted

 

Yeah you're general autoparts stores sells those for pretty cheap. You can also order them online if you're not near an autoparts store.

Note to avoid slicing into the factory wiring harness, you'll need to re-use the factory wiring on the old OS sensor so it nicley "plugs" into the wiring harness.

Also spray the old O2 Sensor with some penetrating oil (PB Blaster) several times before attempting to remove it. I used an offset/adjustable neck wrench to remove the OS sensor. It's a bit ackward to get a normal wrench on it.

It takes several weeks for the O2 sensor to break in. You may notice a dip in fuel economy until then.