The 4-wire narrow-band oxygen sensor is a replacement sensor for select 1996-2022 Audi, Seat and Volkswagen applications. 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 350-34610 Oxygen Sensor Features:

• Fits 1999 Audi TT; 2000-2001 Audi S3; 2001-2006 Seat Leon; 2002-2008 Seat Ibiza; 2003-2009 Seat Cordoba; 2010 Seat Nuevo Ibiza; 1996-2001 Volkswagen Combi, Derby
• Fits 1996-1998 Volkswagen Panel; 1998-2000 Volkswagen Beetle; 1998-2003 Volkswagen Sedan; 1999-2001 Volkswagen Golf; 1999-2005 Volkswagen Jetta
• Also fits select Audi, Seat and Volkswagen applications
• Sensor locations by application: B1S1, B1S2, B1S3 (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, 650 mm (25.6 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