This 4-wire wide-band air/fuel ratio sensor fits 2016-2017 Lexus GS200t, IS200t, RC200t, 2018-2019 Lexus GS300, 2018-2025 Lexus IS300 and RC300 with the 2.0L I4 engine in the upstream position and reports the exhaust air-fuel ratio so the engine computer can meter fuel precisely. A built-in heater brings the element to operating temperature quickly after a cold start.

Walker Products 350-64127 Air/Fuel Ratio Sensor Features:

• Fits 2016-2017 Lexus GS200t, IS200t, RC200t; 2018-2019 Lexus GS300; 2018-2025 Lexus IS300, RC300 with the 2.0L I4 engine
• Sensor location by application: B1S1 (bank and sensor number)
• 4-wire wide-band air/fuel ratio sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 450 mm (17.7 in.) overall length
• Male square connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue