The 4-wire wide-band air/fuel ratio sensor is a replacement sensor for 2008-2010 Scion xB, 2009-2010 Scion tC, 2004-2008 Toyota Camry and 2005-2007 Toyota Solara with the 2.4L I4 engine 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 250-54107 Air/Fuel Ratio Sensor Features:

• Fits 2008-2010 Scion xB; 2009-2010 Scion tC; 2004-2008 Toyota Camry; 2005-2007 Toyota Solara with the 2.4L I4 engine
• 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, 525 mm (20.7 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