This 4-wire narrow-band oxygen sensor fits select 1995-2003 Audi and Volkswagen applications 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 350-34029 Oxygen Sensor Features:

• Fits 1997 Audi A4, A4 Quattro; 1995-1999 Volkswagen Jetta; 1996-1999 Volkswagen Cabrio; 1996-1998 Volkswagen Golf; 1996-1997 Volkswagen Passat
• Fits 1998-2003 Volkswagen Pointer, Pointer Truck
• Engine coverage includes 1.8L I4, 2.0L I4, 2.8L V6 applications
• Sensor locations by application: B1S1, B1S2 (bank and sensor number)
• 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, 1140 mm (44.9 in.) overall length
• Male/female oblong connector at the harness end with 4 spade terminals
• Platinum electrode layer with a protective coating against combustion residue