Hey all,

In the process of installing ppe headers and complete exhaust system, but am wondering what size thread is the o2 sensor? Or is this a universal type of application? Because all the o2 bungs that i have seen dont mention anything about the thread?

Thanks
Charley

I think they're all the same thread, M18 x 1.5. Only other thing is that Toyota will sometimes use a 2 bolt mount and the sensor isn't threaded. But for the SC400, I think it's the 18mm thread. If you wanna check first, go to a parts store and see if they have an O2 sensor in stock, and measure it.

Thanks for the heads up, yeah i seen that some toyotas use a flange with 2 studs and non threaded.
Thanks for the help.
Charley

For 1uz, primary and sub o2 sensors are m18x1.5
Charley