The 4-wire wide-band air/fuel ratio sensor is a replacement sensor for 2007-2012 Acura RDX, 2009-2014 Acura TSX, 2008-2012 Honda Accord, 2010-2011 Honda CR-V, 2010-2020 Honda City and 2014 Honda Fit 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 350-64090 Air/Fuel Ratio Sensor Features:

• Fits 2007-2012 Acura RDX; 2009-2014 Acura TSX; 2008-2012 Honda Accord; 2010-2011 Honda CR-V; 2010-2020 Honda City; 2014 Honda Fit
• Engine coverage includes 1.5L I4, 2.3L I4, 2.4L I4 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, 350 mm (13.8 in.) overall length
• Male square connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue