2021 Nissan NV400 Tekna DCI Auto 2.3L Diesel · SN71 AZT

The 2021 Nissan NV400 Tekna DCI Auto received its most recent MOT test on 2025-09-01, achieving a clean pass with no recorded defects, following a previous failure in 2024-09-02 that highlighted two critical issues: a damaged offside rear fog lamp lens emitting white light instead of red, and a compromised near-side front outer drive shaft constant velocity (CV) boot allowing dirt ingress. The failure in 2024 suggests a maintenance lapse or wear progression that necessitated immediate attention, whereas the 2025 test indicates either effective remedial work or a temporary resolution that has since stabilized. The advisory for no recordable diesel smoke emissions in 2024-09-02 is noteworthy but not indicative of a deeper issue, as modern diesel engines are designed to meet stringent emissions standards without such advisories being commonplace unless there is a persistent problem with particulate matter or exhaust system integrity. While the 2025 pass is reassuring, the prior failure points to a history of mechanical oversight, particularly around the CV joint boot and lighting components, which should prompt further scrutiny during inspection. The recorded mileage of 128,730 miles for a vehicle aged five years represents a high annual usage rate of approximately 25,746 miles per annum, which is significantly above the average for its class and age. Such mileage accumulation typically accelerates wear on consumables like brake pads, suspension components, and drivetrain elements, as well as fluid degradation in the cooling, transmission, and hydraulic systems. The CV joint boot failure in 2024-09-02 underscores the importance of regular inspection of drive shaft boots, particularly in high-mileage vehicles, where the risk of premature failure due to dirt ingress and mechanical stress is elevated. Additionally, the rapid mileage accumulation may suggest either aggressive driving practices or periods of prolonged use without adequate rest, both of which can exacerbate wear on suspension bushes, coil springs, and exhaust components. A thorough inspection should therefore prioritise the CV joint and adjacent drive shaft components, as well as the suspension for signs of excessive play or corrosion in the mounting points. Given the vehicle’s history of MOT failures and high mileage, prospective buyers should conduct a meticulous mechanical inspection to address the immediate and long-term implications of the recorded defects. The damaged offside rear fog lamp lens, while not a roadworthiness hazard, is a cosmetic failure that may require replacement to restore compliance with lighting standards, particularly if the lens is cracked or otherwise compromised. The near-side front outer CV joint boot failure is a critical concern, as the ingress of dirt and lubricant loss will inevitably lead to bearing wear, increased noise, and eventual joint failure. During a test drive, listen for a metallic grinding or clunking noise from the front axle area, particularly when accelerating or turning sharply, which would indicate CV joint play or seal failure. Additionally, inspect the boot visually for signs of splitting or oil staining, and check for excessive play in the drive shaft by applying pressure to the boot while the engine is running. Beyond the immediate defects, the high annual mileage demands a comprehensive inspection of the suspension, brakes, and drivetrain. Examine the suspension for signs of worn or cracked suspension bushes, coil springs, and shock absorbers, as these components degrade more rapidly under high mileage. Listen for clunking noises from the suspension during cornering or over bumps, which may indicate bush wear or spring failure. Inspect the brake system for uneven wear on discs and pads, which could signal binding calipers or warped discs, and check for corrosion or binding on the brake discs themselves, especially if the vehicle has been stationary for extended periods. The drivetrain should be inspected for leaks around the transmission, differential, and exhaust system, as well as for signs of fluid degradation or contamination. Given the vehicle’s age and mileage, consider checking the 12-volt battery for signs of corrosion or poor connections, as prolonged idling or high-mileage use can accelerate battery wear. Finally, verify that the service history includes timely fluid servicing, particularly for the diesel engine oil, transmission fluid, and coolant, as these fluids degrade over time and should be replaced according to the manufacturer’s recommendations, even if the vehicle has passed its MOT.