Diesel Fuel Return Lines: Function and Ordering Guide

Fuel return lines are integral components of a fuel system that allow excess fuel to return to the fuel tank, helping to regulate fuel pressure within the system. In diesel common-rail systems, return or leak-off lines carry excess fuel from the injectors back to the tank, and they are a known wear item on high-mileage vehicles.

This guide is an application guide only. It gives no specification for any line, because the manufacturer's pages contain no per-product specification table. The evidenced item in this range is the JF0118 fuel return line combination for Opel Vivaro, Renault Master, and Renault Trafic vehicles, with its part numbers listed on its detail page. Long-tail fitment terms for other diesel models are secondary mentions on this page only: no product page is created for a model for which the manufacturer evidences no item, and no fitment is claimed for those models. If you need a line for a model not listed, send the part number and the vehicle application with your inquiry and ask for the fitment to be confirmed before any order is discussed.

When you write in, include the part number, the vehicle model and year, and the quantity you need. Before payment, confirm the part number, the fitment, the quantity, and the delivery terms.