2016 Audi Q7 3.0L Diesel · CF16 TYX

The most recent MOT test on 2026-07-06 resulted in a clean pass, marking a positive turnaround from the previous failure in 2026-07-03, where a major defect was identified with the offside front outer drive shaft constant velocity (CV) boot split, compromising its sealing integrity and allowing ingress of contaminants. This failure highlights a critical issue with the CV joint assembly, which typically requires immediate attention to prevent accelerated wear of the joint’s internal components or potential failure under load. While the 2026 test shows no defects, the historical pattern suggests that the vehicle has faced recurring wear-related advisories over the past four years, particularly concerning brake components and tyre condition. The advisories from 2023 onwards—such as worn brake pads and discs, and tyres nearing legal limits—indicate a trend of gradual but persistent mechanical degradation, which could escalate if not addressed proactively. The absence of further failures since 2026-07-03 is encouraging, but the CV joint issue remains a significant risk if not rectified, as CV boots degrade over time and are prone to failure under stress, potentially leading to drivetrain misalignment or catastrophic failure. The vehicle’s recorded mileage of 75,159 miles for a 2016 model represents a reasonable annual usage rate of approximately 7,516 miles, which is typical for a car of this age and class, especially if it has been used for both personal and potentially more demanding purposes. However, the mileage alone does not fully account for periods of inactivity, which can exacerbate issues like fluid degradation, corrosion from standing, or wear from infrequent use. For example, brake systems and suspension components may show accelerated wear if the vehicle was left stationary for extended periods, leading to standing corrosion on brake discs or calipers, or stiffness in suspension bushes. The CV joint failure in 2026 underscores the importance of monitoring for signs of excessive play or unusual noises in the front drive shaft area during a test drive, as well as checking for any fluid leaks from the boot seal. Additionally, the consistent advisories on tyre wear patterns—particularly the edge wear—may suggest alignment or camber issues that warrant inspection, as uneven tyre wear can indicate misalignment or suspension component wear. Given the vehicle’s age and the recurring advisories, the buyer should conduct a thorough pre-purchase inspection with a focus on the drivetrain, braking system, and suspension. Start by visually inspecting the CV boot for any signs of cracking, bulging, or oil leakage around the joint, and listen for unusual noises or clunks when driving over bumps or accelerating, as these could indicate CV joint or universal joint (U-joint) wear. The brake system should be checked for even disc thickness, absence of corrosion or binding calipers, and the absence of pulsation or shudder during braking, which could signal warped discs or soft brake pads. Inspect the suspension for excessive play in the joints, signs of worn suspension bushes or coil springs, and any uneven tyre wear that could point to alignment or camber issues. For the tyres, look beyond the tread depth for signs of sidewall cracking or perishing, which can compromise tyre integrity over time, especially if the vehicle has been stored in harsh conditions. Additionally, test the 12-volt battery for voltage output and listen for any electrical whining or unusual noises that could indicate failing alternator or starter components. Beyond the mechanical checks, the buyer should verify the service history, particularly for fluid servicing intervals, as the CV joint failure and other advisories may have been influenced by fluid degradation. The engine oil, brake fluid, and differential fluid should be checked for contamination or degradation, with a recommendation to replace them if they have been in service for more than 50,000 miles or more than five years, respectively. The exhaust system should be inspected for leaks or corrosion, and the emissions components should be checked for functionality, as the CV joint failure could indirectly affect drivetrain efficiency. Finally, address the child seat advisories from previous MOTs by ensuring the seats are securely fitted and do not obstruct access to the adult seat belts, as this is a legal requirement and a safety consideration. If the vehicle has been used for towing or heavy loads, additional checks for suspension and drivetrain components would be prudent, as these activities can accelerate wear.