ASP5410-6606718 | Genuine DuraWRX® DEF Multifunction Head 40 micron, 18" Cap Bracket Signs of a Bad DEF

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ASP5410-6606718 | Genuine DuraWRX® DEF Multifunction Head 40 micron, 18" Cap Bracket Signs of a Bad DEFDescription: A Diesel Exhaust Fluid (DEF) header ASP5410 6606718 is a key component in a diesel vehicles emissions control system, specifically within the Selective Catalytic Reduction (SCR) system. The DEF header (also called a DEF tank head or DEF sender assembly) is the unit mounted on or inside the DEF tank. It monitors and manages the Diesel Exhaust Fluid thats injected into the exhaust to reduce harmful nitrogen oxide (NOx) emissions. Part