Bosch 0281007943 Diesel Particulate Matter PM Sensor

The Bosch 0281007943 is a direct-fit Particulate Matter (PM) sensor designed to monitor the function of the Diesel Particulate Filter (DPF) in diesel-powered vehicles. As a pioneer in resistive-measurement PM sensor technology, Bosch developed this sensor to provide the engine control unit (ECU) with precise, real-time soot concentration data from the exhaust stream.

Unlike older differential-pressure sensors that indirectly estimate soot levels, this sensor uses a resistive measurement principle: soot particles accumulate on an inter-digital electrode structure, forming conductive trails that are measured as current. Before each measurement cycle, an integrated heater regenerates the sensor element to ensure a clean baseline reading. The ECU uses this data to determine when DPF regeneration is truly necessary, avoiding unnecessary regeneration cycles.

Key Features:

• Monitors diesel particulate filter (DPF) function via direct soot concentration measurement
• Helps reduce particulate emissions by up to 99%
• Resistive measurement principle delivers precise, real-time data to the ECU
• Reduces unnecessary DPF regenerations, improving fuel efficiency and reducing ash buildup
• Extends the service life of DPF and downstream aftertreatment components
• Supports on-board diagnostic (OBD) compliance and current emission standards
• Communicates with the engine control unit via CAN
• Rated for 12V/24V operation
• Designed for a service life of up to 250,000 km (approx. 155,000 miles)
• Built and tested to OE quality standards — the same sensor trusted by original equipment manufacturers
• Suitable for use in passenger cars and commercial vehicles
• Installs downstream of the diesel particulate filter with a retaining screw for quick, easy fitment

The Bosch 0281007943 PM sensor is engineered for workshops and technicians who need a reliable, OE-grade replacement that restores proper DPF monitoring, protects aftertreatment system integrity, and keeps diesel vehicles compliant with stringent emissions regulations.