The oxygen sensor installs on select 2006-2024 BMW and Mercedes-Benz applications. It measures the exhaust air-fuel ratio across a broad range 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 350-35058 Oxygen Sensor Features:

• Fits 2006-2010 BMW 130i, 525i, 550i, 650i; 2006-2013 BMW 325i, 530i; 2006 BMW 325xi, 330xi; 2006-2007 BMW 330i, 525xi, 530xi; 2006-2011 BMW Z4; 2007-2013 BMW 328i
• Fits 2007-2008 BMW 328xi; 2007-2017 BMW X3; 2007-2010 BMW X5; 2008-2013 BMW 125i, 128i; 2008-2011 BMW 528i; 2008 BMW 528xi; 2009-2013 BMW 328i xDrive
• Also fits select BMW and Mercedes-Benz applications
• Sensor locations by application: B1S2, B1S3, B2S1 (bank and sensor number)
• Used in both upstream and downstream positions, depending on application
• 5-wire wide-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 1050 mm (41.3 in.) overall length
• Male oblong connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue