The oxygen sensor installs in the downstream position on select 2018-2025 Ford and Lincoln applications. It signals whether the exhaust is running rich or lean so the engine computer can trim fuel delivery. It uses a female oblong connector with 4 terminals.

Walker Products 350-341081 Oxygen Sensor Features:

• Fits 2018-2020 Ford F-150; 2018-2022 Ford Lobo; 2018-2024 Ford Mustang; 2019-2024 Ford Edge; 2020-2024 Ford Explorer, Lincoln Aviator
• Fits 2020-2025 Ford Police Interceptor Utility, Transit-150, Transit-250, Transit-350, Transit-350 HD; 2020-2022 Ford Transit; 2019-2023 Lincoln Nautilus
• Engine coverage includes 2.7L V6, 3.0L V6, 3.3L V6, 3.5L V6, 5.0L V8, 5.2L V8 applications
• Sensor locations by application: B1S2, B2S2 (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, 400 mm (15.7 in.) overall length
• Female oblong connector at the harness end with 4 spade terminals
• Platinum electrode layer with a protective coating against combustion residue