Doc's Auto Parts Engine Air Filter DA6171 1999-2004 When the DEF is clean

When the DEF is clean and reliable

012 Gallons (12 Quarts)

change according to your vehicle’s manufacturer warranty

Its advanced formula reliquefies gelled fuel and melts ice in frozen filters

and saves you from those big repair bills down the road

Doc's Auto Parts Engine Air Filter DA6171 1999-2004 When the DEF is cleanDocs Auto Parts Engine Air Filters: Doc's Auto Parts Premium Engine Air Filters are built for reliable performance and everyday durability. They help block dirt, dust, and debris that can cause premature engine wear, keeping clean air flowing to your engine. A high quality silicone gasket creates a secure seal, even in harsh or dusty driving conditions, while deep pleated filter media captures more contaminants to support smoother operation, improved