The Bosch O2 Oxygen Sensor part number 13405 is a direct replacement for Toyota Pickup trucks from 1989 to 1991. It is a 4-wire type sensor with a 14.3-inch wire length, designed for specific fitment in Standard Cab, Extended Cab, and Cab & Chassis models with a 2.4L engine. This oxygen sensor is crucial for monitoring and regulating the air-fuel mixture in the exhaust system to optimize engine performance and reduce emissions. It is sold individually and features OE sensor technology for accurate readings.