2022 Volkswagen Caddy Maxi C20 Commerce + TDI 2.0L Diesel · GD71 ENV

The latest MOT test results for the 2022 Volkswagen Caddy Maxi C20 TDI show a failure in September 2025, with the vehicle passing only a month later, indicating a concerning pattern of recurring issues rather than a straightforward maintenance oversight. The failure stemmed from two critical advisories regarding tyre wear close to the legal limit, described as worn on the edge—a condition often associated with improper alignment, excessive camber angles, or suspension component wear, such as worn coil springs, suspension bushes, or damaged control arms. The most severe defect was a major failure of the AdBlue injector and pipe, which is a critical component for the vehicle’s diesel particulate filter (DPF) system. This failure is not only a roadworthiness issue but also poses a significant environmental risk, as AdBlue leaks can contaminate waterways. The fact that the same tyre wear advisories recurred in the subsequent test suggests that the underlying suspension or alignment issues have not been fully resolved, while the AdBlue failure indicates a deeper mechanical problem that requires immediate attention. The inconsistency between the two MOT results highlights the need for thorough diagnostics to address both the tyre wear and the AdBlue system failure comprehensively. The vehicle’s recorded mileage of 39,661 miles at the time of assessment represents a moderate annual usage rate of approximately 9,915 miles, which is within the expected range for a four-year-old car of this class. However, the mileage data alone does not reveal whether the vehicle has been subjected to consistent, heavy use or periods of prolonged inactivity, which can accelerate wear in certain systems. For instance, standing for extended periods can lead to brake disc corrosion, binding calipers, or fluid degradation due to stagnation, whereas higher mileage accumulation might suggest more frequent exposure to road conditions that exacerbate suspension, tyre, or drivetrain wear. Without additional context on the vehicle’s operational profile, the current mileage does not definitively indicate whether the wear observed in the MOT results is due to normal usage or avoidable neglect. The AdBlue failure, in particular, may have been influenced by factors such as incorrect AdBlue dosing, prolonged idling, or exposure to high temperatures, which can degrade the system over time. Given the recurring tyre wear advisories and the critical AdBlue failure, the prospective buyer should prioritise a detailed inspection of the suspension system to identify the root cause of the uneven tyre wear. During a test drive, listen for unusual noises from the front suspension, such as clunks or rattles, which could indicate worn suspension bushes, damaged control arms, or failing coil springs. Check for uneven tyre wear patterns, particularly on the edges of the front tyres, which may suggest misalignment or camber issues. Additionally, inspect the front wheels for any signs of binding or excessive play, which could indicate binding calipers or warped brake discs. The AdBlue failure necessitates immediate attention to the diesel particulate filter (DPF) system, including verifying the integrity of the AdBlue injectors and pipe, as well as checking for any leaks or contamination. The buyer should also arrange for a professional diagnostic to confirm the cause of the AdBlue failure, as further damage to the DPF or catalytic converter could result in costly repairs. Until these issues are resolved, the vehicle will not meet roadworthiness standards and should not be driven. For the buyer’s practical inspection beyond the MOT findings, given the vehicle’s age and moderate mileage, it is advisable to focus on common age-related wear and potential standing-related issues. Inspect the tyres for signs of sidewall cracking or perishing, which can occur even with moderate mileage due to prolonged exposure to UV light and temperature fluctuations. Check the brake system for any signs of corrosion on the discs or rust on the brake lines, as standing vehicles can accelerate corrosion in these components. Verify the health of the 12V battery, ensuring it holds a charge and has no signs of swelling or leakage, as batteries can degrade over time regardless of usage. The engine oil and coolant should be checked for any signs of degradation, such as sludge in the oil or sediment in the coolant, which may indicate time-based fluid servicing is overdue. Given the AdBlue failure, the buyer should also confirm that the AdBlue reservoir is full and that there are no visible leaks or contamination in the system. Finally, a thorough visual inspection of the exhaust system for corrosion or structural integrity is recommended, as older vehicles can develop rust in the exhaust manifold or catalytic converter.