Walker Products Oxygen Sensor P/N:250-54115

Keep your engine's air-fuel feedback accurate with the Walker Products Oxygen Sensor 250-54115, a wide-band air/fuel ratio sensor that reads the oxygen content of the exhaust gas so the ECU can monitor the air-fuel ratio for combustion efficiency. It installs as an application-specific, direct-fit OE replacement for the 2016-2017 Lexus GS200t, 2018-2019 Lexus GS300, 2016-2017 Lexus IS200t, 2018-2025 Lexus IS300, 2016-2017 Lexus RC200t and 2018-2025 Lexus RC300 — all with the L4-2.0L engine.

• Wide-band measurement: determines the oxygen level in the exhaust gas to help the ECU fine-tune the air-fuel mixture and support normal fuel economy.
• Heated, 4-wire design: a heated sensor with 4 wires (20-gauge) for faster, stable diagnostic feedback to the ECU.
• Platinum electrode layer: electrodes made of a gas-permeable platinum layer, with a coating that helps prevent contamination and erosion of the electrode surfaces by combustion residue and particulates.
• Easy service: threaded mounting with a 22 mm wrench size and a square 4-spade connector.

If a failed oxygen sensor is the cause of poor running, higher fuel consumption, increased emissions or an illuminated malfunction indicator lamp, this replaces it — diagnose the cause first, and inspect the sensor, wiring harness and connector for damage. Manufacturer part number 250-54115 (also 25054115). Country of origin: United States.