This 1-wire narrow-band oxygen sensor fits select 1983-1994 Ford, 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.

Walker Products 350-31035 Oxygen Sensor Features:

• Fits 1989 Ford Probe; 1983-1989 Mazda 626; 1983-1985 Mazda GLC; 1986-1989 Mazda 323; 1987 Mazda B2600; 1988-1989 Mazda MX-6, Mercury Tracer; 1991-1994 Mercury Capri
• Engine coverage includes 1.5L I4, 1.6L I4, 2.0L I4, 2.2L I4, 2.6L I4 applications
• Sensor location by application: B1S1 (bank and sensor number)
• 1-wire narrow-band oxygen sensor
• Unheated design
• M18x1.5 threaded mounting with a 22 mm hex, 655 mm (25.8 in.) overall length
• Female rectangle connector at the harness end with 1 spade terminals
• Platinum electrode layer with a protective coating against combustion residue