This 4-wire narrow-band oxygen sensor fits 2004-2009 Mazda 3, 2006-2008 Mazda 6 and 2011-2017 Mazda 2 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 350-34246 Oxygen Sensor Features:

• Fits 2004-2009 Mazda 3; 2006-2008 Mazda 6; 2011-2017 Mazda 2
• Engine coverage includes 1.5L I4, 2.0L I4, 2.3L I4 applications
• Sensor locations by application: B1S2, B1S3 (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, 820 mm (32.3 in.) overall length
• Female square connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue