Dorman 904-5201CD Diesel Exhaust Fluid (DEF) Filler Cap Compatible with Select Freightliner Models

Direct replacement - this diesel exhaust fluid (DEF) filler cap is designed to match the fit and function of the original cap on specified vehicles

Restores functionality - reliable replacement for an original cap that is leaking or failed due to wear

Durable construction - this part is made from quality materials to ensure reliable performance and long service life

Trustworthy quality - backed by team of product experts in the United States and more than a century of automotive experience

Ensure fit - Input your vehicle into the garage tool and check Confirmed Fit bar at the top of the page. If there is an “i” in a blue circle, additional verification is needed. Please hover over the "i" to verify fitment notes match your vehicle.