2004 Land Rover Discovery 2.5L Diesel · AW04 CPX

A pattern of front-end corrosion on the coil springs and brake pipework dominates the mechanical history of this Discovery and warrants close scrutiny before purchase. The 2025-11-27 test passed, but advisories were raised for a coolant leak and for corrosion on both front coil springs, continuing a downward trend visible since 2022 when the front-to-rear brake pipe was first flagged as corroded though masked by underbody grease. That brake pipe deteriorated sufficiently to fail the 2023-11-30 test as a Major defect on both the nearside front-to-rear section and the nearside front run, requiring repair before a same-day pass was issued. Front oil seepage has also been a recurring advisory across the last three tests, indicating persistent age-related gasket or sealing wear from the engine block or ancillary components. Taken together, the record suggests an underbody and engine bay that are ageing predictably for a 22-year-old vehicle, with corrosion progression rather than isolated component failure being the defining concern. Mileage accumulation is modest at 105,009 miles over 22 years, equating to approximately 4,773 miles annually, well below typical figures for a working or family-used Discovery. There are no notable gaps in the annual MOT cycle that would suggest a long-term off-road period, with tests recorded every year from 2022 onwards, and the gradual mileage progression is consistent with light domestic use. Lower annual mileage of this kind typically produces more standing time than mechanical wear, which can accelerate surface corrosion on ferrous components such as brake lines and suspension linkages, particularly if the vehicle has spent time outdoors or on damp winter roads. The Watts linkage and anti-roll bar components flagged in 2022 and 2023 are consistent with this profile, as rubber and unprotected metallic joints suffer from inactivity and weathering as readily as from mileage-related wear. Any prospective buyer should focus the pre-purchase inspection on the items that have already triggered advisories or failures, starting with a thorough visual and tactile examination of the brake pipework along its full length from engine bay to rear axle, paying particular attention to the nearside front and front-to-rear sections where the 2023 Major defects were recorded; surface rust that has been wire-brushed and painted should not be accepted as a permanent repair. The front coil springs should be inspected for flaking or section loss, especially on the nearside, and the cooling system pressure-tested to identify the source of the current coolant leak, which could originate from the radiator, thermostat housing, or a failing water pump seal. On test drive, listen for clonking or knocking from the front suspension over uneven surfaces, which would indicate worn lower arm ball joint dust covers progressing into joint play, and feel for vagueness or shimmy in the steering that could point to the Watts linkage bushes flagged in 2022. Brake pedal feel should be firm and consistent, with no judder under braking that would suggest warped front discs, and the engine bay should be examined for fresh oil residue around the front cover and sump area to gauge whether the recurring oil leak is stable or worsening. Given the documented brake pipe corrosion history, budgeting for a full brake line refurbishment should be considered a realistic near-term expense regardless of any remedial work already carried out.