If your older Toyota's fuel economy has dropped or it's running rough, a failing oxygen sensor could be to blame. This is a genuine DENSO upstream oxygen (O2) sensor, designed for 1991-1995 Toyota 4Runners, Pickups (Truck), and Previas with the 2.4L 4-cylinder or 3.0L V6 engines. It's a 4-wire sensor with a mini-blade terminal and a female connector. This is the primary sensor that monitors exhaust gases before the catalytic converter. The listing includes a huge list of interchange part numbers, so it likely fits many applications. It comes with the wire harness attached and is a direct fit replacement. Brand new, in original packaging. No manufacturer warranty is stated, but DENSO is a top-tier OEM supplier. Replacing a worn O2 sensor can restore power, improve MPG, and help your engine run cleaner. It's a common maintenance item on high-mileage vehicles. Get your Toyota breathing right again with a quality DENSO sensor.