2016 Fiat Doblo 1.6L Diesel · DF66 AAZ

The latest MOT test completed on 24 September 2025 resulted in a pass, but the overall maintenance trend shows signs of deterioration regarding the exhaust system. Although the vehicle achieved clean passes in 2023 and 2024, the 2025 report includes advisories for exhaust corrosion and a low emitter reading. This indicates that the exhaust components are transitioning from a stable state to a worsening condition, suggesting that repairs or a full replacement of the exhaust assembly will be required in the immediate future to avoid a future failure. With a recorded mileage of 53,257 over approximately ten years, the vehicle has averaged roughly 5,326 miles per year. This is significantly lower than the typical usage for a light commercial vehicle, which can be a double-edged sword. While the engine and gearbox may have relatively low mechanical wear, the low usage profile increases the risk of issues stemming from long periods of standing. This includes the potential for fluid degradation, rubber component perishing, and uneven tyre wear, as previously noted in the 2022 MOT advisory regarding front tyre edges. When conducting a test drive, you should listen intently for any abnormal noises from the exhaust, such as loud droning, rattling, or excessive vibration, which would confirm the reported corrosion. Pay close attention to any smells of exhaust fumes inside the cabin, as this indicates a leak that could pose a health and safety risk. Given the advisory for a low emitter reading, observe the engine's performance for any signs of rough idling or hesitation. You should also inspect the underside of the vehicle for heavy scaling or structural weakness in the exhaust piping and mounting brackets. Due to the low annual mileage, a thorough inspection of age-related wear is essential. Check the tyres for sidewall cracking or perishing, which can occur even if the tread is deep. Inspect the brake discs for heavy corrosion and ensure the calipers are not binding, which often happens when a vehicle is not driven frequently enough to clear debris and heat. It is also critical to verify the service book to ensure that oil and fluid changes have been carried out on an annual basis, as time-based degradation is a major factor for low-mileage vehicles. Finally, check the condition of the 12V battery, as infrequent driving often leads to insufficient charging.