The DFC brake hose for 2021–2023 Ford F-150 4WD rear upper is a replacement hydraulic line that transfers brake fluid from the chassis hard line to the rear wheel brake assembly, restoring braking at that location. Specified for F-150 4WD models in the listed years and the rear upper position, it provides a targeted repair part for worn, leaking, or damaged upper rear hoses on those trucks.
DFC 21-23 Ford F-150 4WD Rear-up Brake Hose