where did you buy your TRD gauge? is it only the gauge with sensor and wiring?Caughron said:http://www.mkiv.com/techarticles/oil_sensor_mod/index.html
That's what I followed. Basically, you need to order a Union Bolt for the IS300 unless you have a 98 supra. That's about it. I did this install in about 15 minutes w/ a TRD gauge.