The 4-wire narrow-band oxygen sensor is a replacement sensor for 2015 Hyundai Grand i10 and 2021-2024 Kia Seltos in the upstream 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 350-34209 Oxygen Sensor Features:

• Fits 2015 Hyundai Grand i10; 2021-2024 Kia Seltos
• Engine coverage includes 1.3L I4, 2.0L I4 applications
• Sensor location by application: B1S1 (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, 750 mm (29.5 in.) overall length
• Female square connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue