The 4-wire narrow-band oxygen sensor is a replacement sensor for 2022 Audi Q3 and 2018-2024 Volkswagen Tiguan with the 2.0L I4 engine 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 250-241242 Oxygen Sensor Features:

• Fits 2022 Audi Q3; 2018-2024 Volkswagen Tiguan with the 2.0L I4 engine
• Sensor location by application: B1S2 (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, 900 mm (35.4 in.) overall length
• Female oblong connector at the harness end with 4 spade terminals
• Platinum electrode layer with a protective coating against combustion residue