2004 Land Rover Discovery 2.7L Diesel · AD54 MUD

The Discovery's roadworthiness status is currently failed, and the maintenance trend is clearly worsening. The most recent test on 23 May 2023 at 204,783 miles recorded a failure with multiple serious defects. The tester flagged a supplementary restraint system warning lamp indicating a fault, excessive blue smoke preventing a completed emissions test, and exhaust emissions likely to obscure other road users' vision. Underbody corrosion was noted alongside corroded fuel tank straps and various suspension components, with a specific advisory that the vehicle structure was corroded, though structural rigidity was not yet significantly reduced. This represents a marked deterioration from the clean pass recorded in September 2020 at 198,279 miles, suggesting the vehicle has either been stored or poorly maintained in the intervening period. The mileage pattern is unusual and warrants scrutiny. Between the September 2020 pass at 198,279 miles and the May 2023 failure at 204,783 miles, the vehicle accumulated 6,504 miles over approximately 2 years and 8 months, averaging roughly 2,300 miles per year. This is significantly below the vehicle's lifetime average of approximately 9,308 miles per year. The low recent mileage could indicate long periods of standing, which would explain the corrosion-related failures and deteriorated rubber components. The gap between the December 2021 pass at 203,802 miles and the May 2023 failure shows only 981 miles covered in over 17 months, reinforcing the likelihood of prolonged inactivity. A buyer should approach this vehicle with considerable caution and arrange a thorough independent inspection. The structural corrosion flagged in May 2023, particularly the corroded fuel tank straps and underbody corrosion, demands close examination of the chassis rails, cross-mountings, and bulkhead for progressive deterioration. The suspension components noted as corroded should be inspected for seized joints and perished bushes, which would compromise handling and ride quality. The SRS warning lamp fault requires diagnostic interrogation to determine whether it stems from a simple clock spring failure or a more costly airbag module issue. The excessive blue smoke points to worn valve stem seals, piston ring wear, or turbocharger oil seal failure, any of which indicate significant engine wear at this mileage. The brake condition also requires attention. The 2019 advisory for nearside rear brake pads wearing thin and slight play in the nearside rear anti-roll bar linkage ball joint were never formally rechecked in subsequent passes. Combined with the 2018 advisory that all tyres were on wear bands and the parking brake only just passed, this suggests braking and suspension upkeep was neglected over several years. The vehicle has not held a valid MOT since May 2023, meaning it has been untaxed and undriven for over three years. A full mechanical survey, including a compression test, structural corrosion assessment, and SRS diagnostic scan, is essential before any purchase decision.