The 3-wire narrow-band oxygen sensor is a replacement sensor for 1987-1990 Toyota Supra with the 3.0L I6 engine in the upstream position. It signals whether the exhaust is running rich or lean so the engine computer can trim fuel delivery. A built-in heater brings the element to operating temperature quickly after a cold start.

Walker Products 350-33019 Oxygen Sensor Features:

• Fits 1987-1990 Toyota Supra with the 3.0L I6 engine
• 3-wire narrow-band oxygen sensor
• Built-in heater for fast warm-up
• Flange-mount body
• Overall length of 500 mm (19.7 in.)
• Male circle connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue