2017 Fiat Unknown 2.3L Diesel · SP17 FWD

The most recent MOT test for this 2017 Fiat, conducted on 2025-10-29, resulted in a clean pass with no recorded defects, marking a positive turnaround following a previous failure in 2025-10-22 where the engine’s Malfunction Indicator Lamp (MIL) was deemed inoperative or indicating a persistent malfunction. The preceding MOT history demonstrates a stable maintenance trend up to 2024, with all tests from 2020 onward passing without defects, aside from a single COVID-19-related six-month extension in 2020-07-07. The 2025 failure, however, reveals a critical issue that required immediate attention, suggesting either a diagnostic error or a deeper underlying problem that was not fully resolved at that time. While the vehicle has since passed, the MIL-related failure indicates that the engine control unit (ECU) or sensors may still be compromised, warranting further investigation to rule out recurring electrical or wiring faults that could lead to future emissions or performance issues. The recorded mileage of 14,537 miles for a vehicle aged nine years is notably low, translating to approximately 1,615 miles per year—a rate that is significantly below the average annual mileage for such an age group, which often exceeds 10,000 miles. This low usage profile could reflect periods of prolonged inactivity, such as storage or infrequent roadside use, which can accelerate wear in certain components due to standing corrosion, fluid degradation, or mechanical stress from idling. However, the absence of higher mileage accumulation suggests that the vehicle has likely been maintained under lighter operational conditions, potentially reducing wear on consumables like brake pads, tyres, and suspension components. That said, the low mileage does not automatically mitigate risks associated with age, such as potential engine or transmission wear, or the gradual deterioration of internal components that may not show up in mileage alone. Given the MIL failure and the vehicle’s age, the buyer should prioritise a thorough inspection of the engine bay and related systems. The presence of a persistent MIL indicates that the engine management system may have unresolved issues, potentially linked to faulty sensors, wiring, or the ECU itself. On a test drive, listen for unusual engine noises, such as knocking or misfires, which could signal deeper engine wear or fuel system problems. Inspect the engine bay for oil leaks around the valve cover, oil pan, or coolant hoses, as these are common failure points in older vehicles. Check the battery terminals for corrosion and ensure the 12V battery holds a charge when cold cranking amps (CCA) are tested, as prolonged disuse can lead to sulphation or internal failure. Additionally, verify that the vehicle’s service history includes recent oil changes and fluid top-ups, as oil degradation and sludge buildup can exacerbate engine issues over time. For a vehicle of this age and low-mileage profile, the buyer should also focus on non-mechanical but critical checks that are often overlooked in lightly used cars. Examine the tyres for sidewall cracking or perishing, which can occur even with low mileage due to prolonged exposure to UV light and temperature fluctuations. Check tyre tread depth for legal compliance (minimum 1.6mm) and look for uneven wear patterns, which may indicate suspension or alignment issues. Inspect the brake system for corrosion on discs and linings, particularly if the vehicle has been stationary for extended periods, as standing brake corrosion can lead to binding calipers or reduced braking efficiency. Verify the condition of the exhaust system for rust or structural integrity, as leaks or damage can affect emissions performance and engine efficiency. Finally, ensure that all fluids—coolant, brake fluid, and transmission fluid—are topped up and free from contamination, as these fluids degrade over time regardless of mileage. If possible, obtain a copy of the service book to confirm that scheduled maintenance, such as timing belt replacement or suspension component checks, has been completed.