2004 Ford Excursion 7.3L Diesel · LJ04 AAV

Recurring issues with the braking system define the mechanical history of this vehicle, punctuated by a recent failure in January 2026 for a binding nearside front service brake and a persistent history of corrosion on the rear brake pipes. While the vehicle successfully passed its most recent MOT on 9 September 2026 with no defects recorded, the transition from a major failure to a pass within two months suggests that the binding caliper was addressed, though the long-term trend of brake pipe corrosion noted in 2019 and 2021 indicates an ongoing vulnerability in the hydraulic system that requires close scrutiny. An accumulation of 54,030 miles over 22 years results in an average of approximately 2,456 miles per year, reflecting a pattern of light usage. While this low mileage may limit the wear on internal engine components and drivetrain internals, it often leads to the degradation of rubber seals, gaskets, and hydraulic lines due to infrequent operation. The vehicle has seen consistent testing intervals, which mitigates the risks associated with extended periods of inactivity, yet the age of the chassis means that any original rubber bushings or hoses are now well beyond their typical design lifespan and may be prone to perishing or cracking despite the low odometer reading. During the test drive, pay particular attention to the braking performance. The history of binding calipers and corroded rear brake lines necessitates a check for any pulling to one side under heavy braking or a spongy pedal feel, which could indicate trapped air or residual issues within the hydraulic lines. Ensure the vehicle tracks straight when the brakes are applied and listen for any grinding or metallic scraping noises from the front wheels, which would suggest that the recent repair did not fully resolve the mechanical stress on the hub or disc assembly. Given the age of the vehicle and the previous advisories regarding the rear brake pipes, a physical inspection of the undercarriage is essential. You should specifically look for signs of surface rust or flaking on the metal brake lines, particularly where they run along the chassis rails or near the rear axle. Furthermore, because the vehicle has spent significant time at a low annual mileage, check for any oil misting or weeping around the engine and transmission seals, as the lack of regular heat cycling can cause these components to harden and leak. Any knocking or clunking sounds from the suspension over uneven surfaces should be investigated, as the original suspension bushes and control arm joints may have deteriorated due to age-related rubber fatigue.