This 3-wire narrow-band oxygen sensor fits select 1986-1995 Ford, Lincoln, Mazda and Mercury applications 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 350-33014 Oxygen Sensor Features:

• Fits 1986-1991 Ford Aerostar
• Fits 1987-1990 Ford Bronco II, E-150 Econoline, E-150 Econoline Club Wagon, E-250 Econoline, Ranger, Thunderbird, Lincoln Continental, Town Car, Mercury Cougar, Sable
• Also fits select Ford, Lincoln, Mazda and Mercury applications
• Sensor location by application: B1S1 (bank and sensor number)
• 3-wire narrow-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 275 mm (10.8 in.) overall length
• Male circle connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue