2015 SEAT Leon 1.6L Diesel · DF15 AHC

The 2023 MOT test for this SEAT Leon was completed successfully with no failures or major defects recorded, although a number of advisories were issued that warrant careful consideration. Comparing this result against the previous two tests, the overall maintenance trend appears stable but with a slow accumulation of wear-related advisories, particularly around the braking system, rear suspension, and minor oil leaks. The absence of any repeat failure for tyre tread depth since the 2018 dangerous failure is encouraging and suggests the previous owner has addressed that issue, though the steady recurrence of suspension-related advisories over three consecutive tests indicates that degradation of coil springs and shock absorbers is progressing. With approximately 250,457 miles recorded over an 11-year period, this vehicle is achieving roughly 22,769 miles per year, which is considerably above the national average and reflects very high use. Annual mileage of this magnitude places considerable strain on the clutch, dual mass flywheel if fitted, turbocharger, and engine oil service intervals, as well as accelerating wear on suspension components, wheel bearings, and drivetrain mounts. There do not appear to be any significant gaps in the MOT record that would suggest prolonged standing, which is positive in terms of avoiding issues such as brake disc corrosion, seized calipers, and dry-rotting of rubber components. However, the high accumulated mileage means that major mechanical components may be approaching or past their expected service life, and verification of full service history is essential. Looking at the recurring advisories, the front brake pads were noted as wearing thin in 2023 after similar observations were absent in earlier tests, suggesting they may now require replacement along with a thorough inspection of the brake discs for lipping, scoring, or corrosion that could necessitate machining or renewal. The offside rear shock absorber has shown light oil misting across both 2022 and 2023 tests, which typically indicates failing internal seals and reduced damping efficiency; on a test drive, listen for clonking or knocking noises from the rear over uneven surfaces and observe whether the vehicle exhibits excessive bounce or instability. The offside rear coil spring was flagged as corroded in 2023, and given the high mileage, it is prudent to inspect all suspension springs for cracking or fracture, as a broken coil spring can render the vehicle unroadworthy. The persistent minor oil leak from the front of the engine should be investigated to identify whether it originates from the sump, cam chain area, or front crankshaft seal, as unresolved leaks can lead to low oil pressure, environmental contamination, and potential engine damage if neglected. Beyond the recorded advisories, a prospective buyer should commission an independent mechanical inspection given the high mileage, with particular attention paid to the condition of the timing chain or belt depending on engine variant, turbocharger function including boost pressure and any whistling noises, and the dual mass flywheel for rattle on idle and clutch slip under load. On a test drive, monitor for any hesitation, misfires, or unusual engine noises that could indicate deeper issues. Inspect the tyres carefully for age-related sidewall cracking and perishing regardless of tread depth, verify that all tyres are of matching age and specification, and check the brake fluid and coolant for their service replacement dates since these fluids degrade over time regardless of mileage. Finally, confirm that the 12V battery is holding charge adequately, examine the exhaust system for corrosion or blowing joints particularly around mounting rubbers and the rear silencer, and ensure the vehicle history check confirms no outstanding finance or accident damage that might compromise structural integrity.