The oxygen sensor installs in the upstream position on select 1976-1991 Audi, Eagle, Jaguar, Nissan and other applications. It signals whether the exhaust is running rich or lean so the engine computer can trim fuel delivery.

Walker Products 350-31045 Oxygen Sensor Features:

• Fits 1978-1987 Audi 5000; 1980-1986 Audi 4000; 1981-1987 Audi Coupe, Subaru Brat, DL, Standard; 1983-1986 Audi Quattro; 1984-1987 Audi 4000 Quattro
• Fits 1988-1989 Eagle Medallion; 1976-1985 Jaguar XJ6; 1982-1985 Jaguar Vanden Plas, Renault Fuego; 1986 Nissan D21; 1990 Nissan Axxess, Yugo Cabrio, GV
• Also fits select Audi, Eagle, Jaguar, Nissan, Peugeot, Renault, Saab, Subaru, Volkswagen, Volvo and Yugo 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, 570 mm (22.4 in.) overall length
• Female circle connector at the harness end with 1 spade terminals
• Platinum electrode layer with a protective coating against combustion residue