The oxygen sensor installs on select 2009-2016 Hyundai and Kia applications. It signals whether the exhaust is running rich or lean so the engine computer can trim fuel delivery. A built-in heater brings the element to operating temperature quickly after a cold start.

Walker Products 350-34390 Oxygen Sensor Features:

• Fits 2010-2013 Hyundai Tucson, Kia Forte, Forte Koup; 2009-2010 Kia Magentis, Optima; 2009-2012 Kia Rondo; 2011-2016 Kia Sportage; 2012-2013 Kia Forte5
• Engine coverage includes 2.0L I4, 2.4L I4 applications
• Sensor location by application: B1S2 (bank and sensor number)
• Used in both upstream and downstream positions, depending on application
• 4-wire narrow-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 575 mm (22.6 in.) overall length
• Male square connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue