The 4-wire narrow-band oxygen sensor is a replacement sensor for 2012-2015 Seat Ibiza and 2013-2017 Volkswagen Polo in the downstream position. 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 350-34854 Oxygen Sensor Features:

• Fits 2012-2015 Seat Ibiza; 2013-2017 Volkswagen Polo
• Engine coverage includes 1.2L I4, 1.4L I4 applications
• Sensor locations by application: B1S2, B1S3 (bank and sensor number)
• 4-wire narrow-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 550 mm (21.7 in.) overall length
• Female oblong connector at the harness end with 4 spade terminals
• Platinum electrode layer with a protective coating against combustion residue