The oxygen sensor installs in the downstream position on 2020 Hyundai Elantra and 2021-2024 Kia Forte5 with the 2.0L I4 engine. 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 350-34856 Oxygen Sensor Features:

• Fits 2020 Hyundai Elantra; 2021-2024 Kia Forte5 with the 2.0L I4 engine
• 4-wire narrow-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 500 mm (19.7 in.) overall length
• Female square connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue