This 3-wire narrow-band oxygen sensor fits 1983-1987 Porsche 928 and 1984-1985 Porsche 911 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 350-33092 Oxygen Sensor Features:

• Fits 1983-1987 Porsche 928; 1984-1985 Porsche 911
• Engine coverage includes 3.2L H6, 4.7L V8, 5.0L V8 applications
• 3-wire narrow-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 550 mm (21.7 in.) overall length
• Male circle connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue