2001 Land Rover Discovery 2.5L Diesel · DA51 ADX

The most recent MOT on 17 June 2026 was passed, although two advisories were recorded – a non‑excessive oil leak and an exhaust emitting excess smoke or vapour. Over the last six years the vehicle has shown a pattern of recurring minor defects, most notably the oil leak which appears on every MOT since 2020, and occasional ancillary issues such as a front wheel bearing play note in 2021, a lower radiator‑support corrosion advisory in 2020 and a brief headlamp failure in 2023. While the car has consistently passed the test, the persistence of the oil leak and the emergence of exhaust smoke suggest that wear is progressing rather than being fully resolved, indicating a maintenance trend that is stable in terms of passing but showing gradual deterioration in specific systems. At 204,970 miles the Discovery has accumulated roughly 8,200 miles per year over its 25‑year life, a usage rate that sits squarely within the normal range for a vehicle of this age. The mileage is not excessive for a 2001 model, but the absolute figure means that major wear items – timing chain, suspension bushings, drivetrain bearings and the braking system – will be well into their service lives. There are no obvious large mileage gaps in the MOT record, so the vehicle has likely been driven regularly rather than sitting idle for long periods, which reduces the risk of age‑related corrosion but does increase the cumulative wear on consumables. A prospective buyer should give particular attention to the source of the oil leak. Common origins on a Discovery of this vintage are the valve‑cover gasket, oil‑pan gasket or the crankcase breather assembly; inspect the undertray for fresh oil, check the dip‑stick for oil on the end, and look for any signs of oil on the exhaust pipe or surrounding components. While the leak is currently classified as non‑excessive, any increase could lead to reduced oil level, bearing wear or fire risk. The exhaust smoke advisory warrants a test‑drive observation for blue or white plumes, especially on acceleration or warm‑up, which could indicate worn valve guides, piston ring wear or an over‑rich fuel mixture; a visual inspection of the exhaust system for carbon build‑up or cracked manifolds is also advisable. The note on lower radiator‑support corrosion should be followed by a close examination of the front sub‑frame, radiator mounting points and coolant hoses for rust, cracked welds or coolant leakage, as structural weakening here can lead to overheating or front‑end alignment issues. Given the vehicle’s age, independent of the recorded advisories, the buyer should verify tyre condition – look for sidewall cracking, tread depth below 1.5 mm or uneven wear that could point to suspension misalignment. Inspect the 12‑volt battery for sulphation and check the cranking voltage; a battery older than four years often needs replacement. Examine the brake discs for surface rust, scoring or uneven thickness, and ensure the calipers move freely without binding. Finally, confirm that all lighting – especially the near‑side dipped‑beam headlamp that previously failed – operates correctly, and if possible, review the service book for evidence of regular oil, coolant and brake‑fluid changes, as time‑based fluid degradation can be as critical as mileage‑related wear on a vehicle of this vintage.