The air/fuel ratio sensor installs in the upstream position on select 2011-2023 Chevy, Infiniti and Nissan applications. 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 250-54102 Air/Fuel Ratio Sensor Features:

• Fits 2015-2018 Chevy City Express; 2011-2012 Infiniti EX35; 2011-2013 Infiniti G37, M37; 2012 Infiniti FX35; 2012-2013 Infiniti M35h; 2013 Infiniti EX37, FX37, JX35
• Fits 2014 Infiniti Q60, Q70, QX50, QX70, Nissan Cube, Maxima; 2014-2017 Infiniti QX60, Nissan NV350 Urvan, Versa Note; 2015 Infiniti Q40; 2011-2015 Nissan 370Z, Quest
• Also fits select Chevy, Infiniti and Nissan 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, 375 mm (14.8 in.) overall length
• Female oblong connector at the harness end with 4 spade terminals
• Platinum electrode layer with a protective coating against combustion residue