The 1-wire narrow-band oxygen sensor is a replacement sensor for 1980-1983 Porsche 911, 1980-1982 Porsche 924 and 928 in the upstream position. It signals whether the exhaust is running rich or lean so the engine computer can trim fuel delivery.

Walker Products 350-31009 Oxygen Sensor Features:

• Fits 1980-1983 Porsche 911; 1980-1982 Porsche 924, 928
• Engine coverage includes 2.0L I4, 3.0L H6, 4.5L V8 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, 475 mm (18.7 in.) overall length
• Female circle connector at the harness end with 1 butt terminals
• Platinum electrode layer with a protective coating against combustion residue