Walker Products Flex Fuel Sensor P/N:243-1003

Walker Products 243-1003 Flex Fuel Sensor

Walker Products #243-1003 is a Genuine OE Flex Fuel Sensor, made in the USA. Supports OEM replacement or high-performance E85 conversions. OE #13577429 compatible.

• Walker Products Flex Fuel Sensor #243-1003 is a Genuine OE sensor, made in the USA and designed to deliver accurate ethanol content readings from 0% to 100%. Outputting a frequency signal from 50 Hz to 150 Hz, this sensor communicates seamlessly with factory and aftermarket systems using OE #13577429 protocols. Engineered with 3/8" quick-connect inlet and outlet fittings, it installs easily in both original equipment and high-performance fuel systems. While ideal as a direct OE replacement on factory flex fuel vehicles, it has also become the industry-standard sensor for high-performance builders converting to E85 or other ethanol blends. Benefits of higher ethanol use include cooler cylinder temperatures, increased octane, reduced engine knock, and improved power potential. Fully compatible with aftermarket ECUs, digital gauges, flex fuel kits, tuners, and mobile apps, this sensor offers unmatched reliability, precision, and versatility. Trust Walker Products to deliver Genuine OE quality for street or track.
• Ideal for OE replacement or high-performance flex fuel conversions using E85.
• Measures ethanol content from 0% to 100% with fast, accurate frequency output.
• 50 Hz–150 Hz signal compatible with OE #13577429 systems and protocols.
• 3/8" quick-connect fittings allow easy integration in factory or custom fuel lines.
• Genuine OE sensor—made in the USA for trusted quality and reliability.