This 4-wire narrow-band oxygen sensor fits select 1995-2023 Lexus and Toyota applications and 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 350-34277 Oxygen Sensor Features:

• Fits 1995-2000 Lexus LS400; 1996-2000 Lexus SC400; 1998-2000 Lexus GS400; 1998-2005 Lexus LX470; 2001-2007 Lexus GS430; 2001-2006 Lexus LS430; 2002-2010 Lexus SC430
• Fits 2003-2004 Lexus GX470; 2008-2015 Lexus LS600h; 2008-2020 Lexus LX570; 2010-2022 Lexus GX460; 1998-2021 Toyota Land Cruiser; 2000-2004 Toyota Tundra
• Fits 2001-2004 Toyota Sequoia; 2003-2020 Toyota 4Runner; 2010-2014 Toyota FJ Cruiser; 2012-2015 Toyota Avanza; 2016-2023 Toyota Yaris
• 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, 275 mm (10.8 in.) overall length
• Male square connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue