The 4-wire wide-band air/fuel ratio sensor is a replacement sensor for select 2007-2016 Infiniti, Nissan and Renault applications in the upstream position. It reports the exhaust air-fuel ratio so the engine computer can meter fuel precisely. A built-in heater brings the element to operating temperature quickly after a cold start.

Walker Products 350-64087 Air/Fuel Ratio Sensor Features:

• Fits 2007 Infiniti QX56, Nissan 350Z, Armada, TITAN, Xterra; 2007-2010 Nissan Altima; 2007-2008 Nissan Frontier; 2008-2009 Nissan Rogue; 2008-2010 Nissan Sentra, Versa
• Fits 2009 Nissan Cube, Maxima; 2009-2016 Renault Koleos
• Engine coverage includes 1.8L I4, 2.0L I4, 2.5L I4, 3.5L V6, 4.0L V6, 5.6L V8 applications
• Sensor location by application: B1S1 (bank and sensor number)
• 4-wire wide-band air/fuel ratio sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 400 mm (15.7 in.) overall length
• Male square connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue