The oxygen sensor installs on select 1993-2021 Lexus, Pontiac, Scion and Toyota 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 350-34099 Oxygen Sensor Features:

• Fits 1993-1997 Lexus GS300; 1994-2003 Lexus ES300; 2003-2009 Lexus GX470; 2004-2006 Lexus ES330; 2005-2007 Lexus LX470; 2007-2018 Lexus ES350; 2008-2014 Lexus LX570
• Fits 2010-2014 Lexus GX460; 2013-2018 Lexus ES300h; 2015-2017 Lexus NX200t; 2015-2021 Lexus NX300h; 2018-2021 Lexus NX300; 2009-2010 Pontiac Vibe; 2011-2016 Scion tC
• Also fits select Lexus, Pontiac, Scion and Toyota applications
• Sensor locations by application: B1S1, B1S2 (bank and sensor number)
• Used in the center 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, 350 mm (13.8 in.) overall length
• Male/female square connector at the harness end with 4 spade terminals
• Platinum electrode layer with a protective coating against combustion residue