Jay Whitely wrote: > SR20DET. Does anyone know off hand the thread pitch of > the rear O2 sensor? I don't have the car with me right I believe 10mmx1.25 if you need I'll dig for my tap but I'm almost posistive thats it. That or 12mmx1.25 RK -- Ray Kawski 1998 Sentra SE Turbo, 1991 NX 2000, 340K mile 1991 Sentra SE-R Poconos, PA