The DPF traps soot from diesel exhaust to meet emissions standards; it self-cleans through regeneration cycles.
A ceramic substrate captures particulate matter. When loaded, the system triggers active regen — injecting extra fuel to burn off soot at high temperature.
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Replacement runs $1500–$6000 including parts and 2-8 hours labor. Exact cost depends on vehicle, parts tier (OEM vs aftermarket), and local labor rate.
Expected lifespan is 150,000-300,000 miles (cleanable, eventually replaced). Driving conditions, climate, and maintenance affect real-world life.
Limp mode / derate; Check-engine + DPF lights; Frequent forced regens; Boost loss; Soot leak from clamps.
Most modern diesel particulate filter (dpf)s are sealed units that get replaced rather than rebuilt. A shop will diagnose, confirm with a load or output test, then swap the unit and verify operation.