This might be a dumb question but I have a 1995 sc300 with production date stamp 1/94. I read in another post that if the car is 92-95 its obd1 and 96-up is obd2 but it also says that the o2 sensor has a 1 wire hook up for the obd1. I have a 4 wire hook up on mine, does that mean I have a ob2 set up?

 

95+ should be obd2 for all cars. does your car have a round data port under the dash near the kick panel or a rectangular one somewhere near there?