This 3-wire narrow-band oxygen sensor fits 1986-1991 Peugeot 505 with the 2.0L I4, 2.2L I4 or 2.8L V6 engines 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 350-33074 Oxygen Sensor Features:

• Fits 1986-1991 Peugeot 505 with the 2.0L I4, 2.2L I4, 2.8L V6 engines
• 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, 515 mm (20.3 in.) overall length
• Male/female rectangle connector at the harness end with 3 spade terminals
• Platinum electrode layer with a protective coating against combustion residue