The oxygen sensor installs on select 2000-2009 Cadillac, Chevy, GMC, Pontiac and other 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 350-34415 Oxygen Sensor Features:

• Fits 2000-2005 Cadillac DeVille; 2000-2002 Cadillac Eldorado; 2000-2004 Cadillac Seville
• Fits 2003-2006 Cadillac Escalade, Escalade ESV, Escalade EXT, Chevy Express 2500, 3500; 2004-2007 Cadillac CTS, Chevy Malibu; 2003-2004 Chevy Cargo Van
• Also fits select Cadillac, Chevy, GMC, Pontiac and Saturn applications
• Sensor locations by application: B1S1, B1S2, B2S1, B2S2 (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, 460 mm (18.1 in.) overall length
• Male square connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue