The 4-wire narrow-band oxygen sensor is a replacement sensor for 1995-1998 Porsche 911, 1998 Volvo C70, S70 and V70. It 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 350-34113 Oxygen Sensor Features:

• Fits 1995-1998 Porsche 911; 1998 Volvo C70, S70, V70
• Engine coverage includes 2.3L I5, 2.4L I5, 3.6L H6 applications
• Used in both upstream and downstream positions, depending on application
• 4-wire narrow-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 890 mm (35 in.) overall length
• Male/female rectangle connector at the harness end with 4 spade terminals
• Platinum electrode layer with a protective coating against combustion residue