AUTOMANN Exhaust Back Pressure Sensor - DOC Inlet Part No: 577.46392OE

The Automann 577.46392OE Exhaust Back Pressure Sensor is engineered to monitor exhaust pressure upstream of the DOC (Diesel Oxidation Catalyst) on Detroit Diesel / Freightliner systems. It directly cross-references Freightliner A4721530928, and is used commonly on DD13 / DD15 EPA-14 / EPA-17 engine platforms. Its compact form factor is approximately 3.42″ long, 1.25″ wide, and 1.25″ high, making it suitable for tight exhaust plumbing spaces.This sensor provides real-time pressure data to the engine control unit (ECU) to help manage exhaust flow, backpressure regulation, and emissions compliance. It’s built to OEM performance standards and helps maintain safe and efficient aftertreatment operation. Wofford Truck Parts stocks this sensor for diesel engine rebuilds and emission system repairs.