2012 Alexander/dennis Enviro 400 (cf) 6.7L Diesel · SN12 AHJ

Consistent roadworthiness has defined the history of this Alexander Dennis Enviro 400, which has maintained a remarkably clean MOT record throughout its documented testing life. The most recent examination on 26 February 2026 resulted in a pass, with a solitary minor defect noted regarding light corrosion on the offside rear reservoir. This trajectory of consecutive passes, punctuated only by this singular minor item in the most recent inspection, suggests a stable mechanical profile that has avoided the recurring failures or persistent component degradation often seen in heavy-duty transit vehicles of this vintage. Accumulating only 40,668 miles over a fourteen-year lifespan results in an average annual usage of approximately 2,905 miles, a figure significantly lower than typical for this class of vehicle. While this low mileage profile limits the total wear on the drivetrain and primary mechanical assemblies, it necessitates a focus on components prone to deterioration during periods of inactivity. The absence of testing gaps indicates that the vehicle has remained in regular circulation rather than being subjected to prolonged storage, which mitigates the risk of seized mechanical linkages or degraded seals that often plague vehicles left stationary for extended durations. Given the recent advisory concerning the offside rear reservoir, a physical inspection of the air system is essential. Prospective buyers should inspect all visible air tanks and associated pipework for signs of flaking rust or structural thinning, as these components are critical for the operation of the braking and suspension systems. During a test drive, listen specifically for any audible hissing sounds while the vehicle is idling, which could indicate a compromise in the integrity of the pneumatic lines or the reservoir itself. Ensure that the air pressure gauges on the dashboard reach the required operating range promptly and remain stable without fluctuating, as this confirms the efficiency of the compressor and the airtight nature of the system. Beyond the air system, the low mileage suggests that suspension bushes and rubber mounting points may be nearing the end of their service life due to age rather than distance covered. During the test drive, pay close attention to any knocking or clunking noises originating from the chassis when traversing uneven surfaces, as these are primary indicators of perishing rubber components or worn linkages. Furthermore, test the braking performance for any signs of pedal sponginess or uneven pulling, which would warrant a closer look at the condition of the brake calipers and discs. While the vehicle has demonstrated a reliable history, these specific areas remain the most likely points of failure for a vehicle that has seen such limited operational use over its fourteen-year life.