Give your engine computer the exhaust-oxygen feedback it relies on with the Walker Products Oxygen Sensor 250-24188, a 4-wire, direct-fit, narrow-band sensor that measures combustion efficiency from the amount of oxygen in the exhaust gas. It fits many vehicles, among them the 2009-2013 Toyota Corolla, 2009-2013 Toyota Matrix and 2006-2010 Lexus SC430. It is cataloged for the downstream position, which is downstream left or downstream right depending on the application. See the Buyer's Guide tab for the full list and engine details.
Walker Products designed its oxygen sensors as an OE replacement. Each part number is built for its specific application and fitment position, and it gives the ECU the diagnostic feedback it requires.
- Exhaust monitoring: Determines the oxygen content of the exhaust gas and monitors the air-fuel ratio for combustion efficiency.
- Mixture feedback: Measures oxygen levels so the air-fuel mixture can be fine-tuned, which helps support fuel economy.
- Emissions role: Monitors exhaust gases as part of the system designed to reduce pollutants.
- Protected electrodes: A coating helps prevent combustion residue and exhaust particulates from contaminating and eroding the electrode surfaces. The electrodes are made of a gas-permeable platinum layer.
Signs this sensor may need replacing: A failing oxygen sensor can make the engine run poorly, raise fuel consumption and emissions, or turn on the malfunction indicator light (MIL). Newer vehicles may also store related fault codes. These symptoms can have other causes, so diagnose the problem first. Also check the sensor, wiring harness and connector for physical damage.
Walker Products is an ISO 9001/TS 16949 certified company, supplying engine management sensors since 1946.
