DEF Sensor : OEM ASP01RS18-FF

Stay Emissions-Compliant with Reliable DEF Sensing

What Is It?

The DEF Sensor (OEM ASP01RS18-FF) is an essential emissions system component that monitors Diesel Exhaust Fluid (DEF) levels, temperature, and concentration in SCR-equipped diesel vehicles. It sends real-time data to the engine control unit to support correct operation of the emissions system and help prevent errors that could impact vehicle function.

Why Choose OEM ASP01RS18-FF?

The OEM ASP01RS18-FF is designed to meet factory specifications, ensuring consistent and accurate communication with the ECU. Unlike universal or off-brand options, this sensor offers precise calibration and durability, helping you avoid unexpected warning lights, diagnostic codes, or system malfunctions.

Key Benefits

✅ Accurate Measurement: Monitors DEF level, temperature, and quality with precision
✅ Factory-Matched Compatibility: Integrates with OEM emission systems without recalibration
✅ Built to Last: Designed to withstand corrosive DEF fluid and harsh environmental exposure
✅ Simple Installation: Connects directly to the OEM harness and DEF tank fittings
✅ Supports Emissions Compliance: Helps maintain proper SCR function and avoid derate conditions

Applications

This sensor is ideal for use in medium and heavy-duty diesel vehicles that use SCR systems to meet emissions standards. It supports the correct operation of DEF systems across commercial trucks, buses, and off-highway equipment, ensuring smooth operation without emission-related disruptions.

Installation Notes

Installation requires basic mechanical knowledge and careful handling to prevent contamination of DEF system components. Always inspect the tank, electrical connectors, and DEF fluid for debris or crystallization. Post-installation, a system check or fault code clearing may be needed to restore normal engine behavior.

Final Thoughts

The OEM ASP01RS18-FF DEF Sensor is a dependable option for keeping your emissions system in working order. With its factory fit and consistent signal transmission, it’s a smart choice for avoiding unnecessary downtime and maintaining compliance in modern diesel applications.