MOPAR 5086810AA FUEL RAIL RETURN LINE FOR 03-07 DODGE WITH 5.9L CUMMINS ENGINE

Product Description

MOPAR 5086810AA FUEL RAIL RETURN LINE FOR 03-07 DODGE WITH 5.9L CUMMINS ENGINE

Maintain proper fuel system operation and restore OEM fuel return performance with the genuine Mopar 5086810AA Fuel Rail Return Line for 2003-2007 Dodge Ram trucks equipped with the legendary 5.9L Cummins turbo diesel engine. Designed to factory specifications, this OEM fuel return tube provides dependable fuel flow management between the rail pressure relief valve and the fuel filter housing.

The Mopar 5086810AA fuel rail return line is engineered to safely channel excess fuel back through the return side of the fuel system, helping maintain correct fuel pressure and reliable engine operation under heavy towing, daily driving, and high-performance diesel applications. Over time, factory fuel lines can become damaged from vibration, corrosion, heat exposure, or improper service procedures, leading to leaks and fuel system inefficiencies.

Manufactured using OEM-quality materials and precision bends, this direct-fit Mopar fuel return tube ensures leak-free performance, proper routing, and hassle-free installation without modification. Unlike universal aftermarket fuel lines, this genuine Mopar component is specifically designed for proper fitment on 5.9L Cummins-equipped Ram trucks.

This fuel rail return line is commonly replaced during injector service, fuel rail repairs, or when addressing fuel leaks near the common rail system. Maintaining a properly functioning return system helps protect fuel system components and supports long-term diesel engine reliability.

FAQ

What does the fuel rail return line do?
The fuel return line routes excess fuel from the fuel rail pressure relief valve back to the fuel filter housing to maintain proper fuel system pressure and operation.

Is this a genuine Mopar OEM fuel line?
Yes. The 5086810AA is a genuine OEM Mopar fuel return tube manufactured to factory Cummins fuel system specifications.

Will this fit all 5.9L Cummins trucks?
This line is designed for select 2003-2007 Dodge Ram trucks equipped with the 5.9L Cummins common rail diesel engine.

Can a damaged return line cause fuel leaks?
Yes. Cracked, corroded, or damaged fuel return lines can leak diesel fuel and negatively impact fuel system performance.

Is installation direct replacement?
Yes. This Mopar fuel return tube installs directly in the factory location using OEM mounting and routing points.

Vehicle Fitment

• 2003 Dodge Ram 2500 5.9L Cummins Diesel
• 2004 Dodge Ram 2500 5.9L Cummins Diesel
• 2005 Dodge Ram 2500 5.9L Cummins Diesel
• 2006 Dodge Ram 2500 5.9L Cummins Diesel
• 2007 Dodge Ram 2500 5.9L Cummins Diesel
• 2003 Dodge Ram 3500 5.9L Cummins Diesel
• 2004 Dodge Ram 3500 5.9L Cummins Diesel
• 2005 Dodge Ram 3500 5.9L Cummins Diesel
• 2006 Dodge Ram 3500 5.9L Cummins Diesel
• 2007 Dodge Ram 3500 5.9L Cummins Diesel

Fits Select Configurations Including:
2WD, 4WD, Mega Cab, Quad Cab, Regular Cab, Long Bed, Short Bed, Automatic 48RE Transmission, 6-Speed G56 Manual Transmission

Specifications for Mopar 5086810AA