2014 SEAT Leon SE Technology TDI 1.6L Heavy oil · DUI 505

The most recent DVSA MOT test, conducted on 2026-01-09, resulted in a passing outcome with no recorded defects, marking the vehicle’s most recent compliance with roadworthiness standards. However, the MOT history reveals a pattern of failures at two separate tests—on 2024-11-08 and 2025-12-04—each returning no defects but indicating potential underlying issues that were not flagged at the time. This inconsistency suggests there may be recurring or latent mechanical concerns that were either overlooked during those failed inspections or were not severe enough to trigger an advisory at the time. While the intervening MOTs passed cleanly, the presence of two failures within a two-year span warrants cautious attention, particularly if the vehicle has accumulated significant mileage or if there are signs of wear progression that could escalate into more critical failures before the next MOT. The recorded mileage of 121,825 miles for a 2014 SEAT León TDI represents a moderate annual usage rate of approximately 10,152 miles, which is within the expected range for a vehicle of this age and model. Such mileage does not inherently indicate excessive wear, but it does imply sustained operational use, which can accelerate the degradation of consumables, suspension components, and drivetrain elements over time. The absence of substantial mileage gaps or rapid accumulation suggests consistent driving habits, but buyers should be aware that prolonged periods of low or no use—common in lower-mileage examples—can lead to issues such as brake system corrosion from standing, fluid degradation from stagnation, or battery discharge from inactivity. The TDI’s diesel engine, in particular, benefits from regular servicing to mitigate carbon buildup in the exhaust system and ensure optimal fuel efficiency, which can be compromised if the vehicle has been driven infrequently. Given the clean MOT history aside from the two failures, this vehicle appears to have undergone routine maintenance, but the buyer should conduct a thorough pre-purchase inspection to address potential hidden wear and age-related vulnerabilities. Focus first on the suspension system, as the TDI’s independent rear suspension (IRS) and multi-link front suspension are prone to bushings and control arm wear, which can develop subtle clunking noises or uneven ride quality over time. Inspect the front and rear suspension bushes for excessive play or cracking, and listen for any irregular clunking or rattling when driving over bumps or at low speeds. The brake system should be scrutinised for signs of corrosion on discs and linings, particularly if the vehicle has been stationary for extended periods, as this can lead to binding calipers or reduced braking performance. Additionally, check the tyre tread depth for uniform wear and look for sidewall cracking or perishing, which can compromise tyre integrity at higher speeds or in adverse conditions. For fluids, the buyer should verify the condition of the engine oil, transmission fluid, and coolant, as these can degrade over time even with regular use. Given the vehicle’s age, the oil should be replaced according to the manufacturer’s recommendations, typically every 60,000–100,000 miles or annually, whichever comes first, to prevent sludge buildup and engine wear. The diesel-specific exhaust gas recirculation (EGR) system and cold-start fluid (CSF) should also be inspected, as these components are critical for emissions compliance and can fail silently if neglected. Finally, test the 12V battery and starter motor for responsiveness, as a failing battery or starter can lead to persistent electrical gremlins or difficulty in starting the engine, especially in colder months. If the vehicle has been driven at a moderate pace, the battery may be in better condition than a lower-mileage example, but a load test is advisable to confirm its capacity. The service book should be checked for the most recent oil change and other essential maintenance, such as timing belt replacement (if applicable) and brake fluid flush, to ensure the vehicle remains in peak operational condition.