The 4-wire narrow-band oxygen sensor is a replacement sensor for 2011-2012 Chevy Spark, 2018-2021 Chevy Beat, 1996-1997 Ford Probe, 1996 Mazda 626 and MX-6. 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 350-34185 Oxygen Sensor Features:

• Fits 2011-2012 Chevy Spark; 2018-2021 Chevy Beat; 1996-1997 Ford Probe; 1996 Mazda 626, MX-6
• Engine coverage includes 1.2L I4, 2.5L V6 applications
• Sensor location by application: B1S1 (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, 580 mm (22.8 in.) overall length
• Male square connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue