This 3-wire narrow-band oxygen sensor fits 1986-1990 Jeep Comanche, 1987-1990 Jeep Cherokee, Wrangler and 1987 Jeep Wagoneer with the 2.5L I4 engine in the upstream position and 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 350-33020 Oxygen Sensor Features:

• Fits 1986-1990 Jeep Comanche; 1987-1990 Jeep Cherokee, Wrangler; 1987 Jeep Wagoneer with the 2.5L I4 engine
• Sensor location by application: B1S1 (bank and sensor number)
• 3-wire narrow-band oxygen sensor
• Titania sensing element
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 275 mm (10.8 in.) overall length
• Male oblong connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue