Need help? We're here!
(888) 312-8812 Login SignupThe Freightliner Diesel Exhaust Fluid (DEF) Tank Header is designed to keep your SCR system operating reliably and efficiently. It holds 13/23 Gal of DEF, giving you enough fluid for long hauls without constant refilling. In addition, a Urea Quality Level Sensor (UQLS) ensures the DEF is at the right level and quality, helping prevent SCR errors that can slow the truck or trigger costly service stops. Built for heavy-duty use, the Freightliner 04-35959-001 tank resists vibration, extreme temperatures, freezing conditions, and chemical exposure, keeping DEF flow steady under tough operating conditions. Its exact factory fit allows for quick, straightforward installation, protecting your engine and helping your truck stay on schedule.
Freightliner® is the best-selling brand of heavy duty trucks in North America. But when it's time to service any of these trucks, it also provides customers with the parts they need right when and where they need them. Its distribution centers are located across the United States and utilize only the latest product-sourcing technology to ensure quick and hassle-free delivery of parts. Freightliner knows how crucial these trucks are for your business operations, so it provides you with only the highest-quality replacement parts to keep your vehicles back on the road. With genuine parts from this brand, customers would never have to worry about installation and performance at all.
California residents see

