2014 Audi A6 2.0L Diesel · AD11 BXD

The most recent MOT test on the 2014 Audi A6 occurred on 2025-12-19, resulting in a passing outcome with no defects recorded. However, the vehicle’s previous MOT history reveals two critical failures within the past two years, indicating a concerning maintenance pattern. The front brake pads failed in 2025 with a thickness below the legal minimum of 1.5 mm, which is a dangerous condition requiring immediate attention. This failure suggests either neglect in brake pad replacement or accelerated wear due to heavy or aggressive driving. The 2023 MOT also highlighted a major issue with the near-side drive shaft constant velocity (CV) joint boot, which had split or become insecure, allowing contaminants to enter the joint. This defect was classified as major, implying significant risk to drivetrain integrity and potential catastrophic failure if unaddressed. The presence of these repeated failures—particularly the brake pads—points to either a lack of proactive maintenance or underlying issues such as misalignment, excessive load, or poor braking habits contributing to premature wear. The vehicle’s recorded mileage of 168,203 miles at 12 years old represents a high annual usage rate of approximately 14,017 miles per year, which is notably elevated for its age. Such mileage accumulation typically accelerates wear on critical components like brakes, suspension, drivetrain joints, and fluid systems. The CV joint failure in 2023, combined with the high mileage, raises concerns about the joint’s long-term condition, as constant velocity joints are prone to wear from excessive use, misalignment, or poor lubrication. The brake pads failing in 2025 under these circumstances further suggests that the vehicle has been subjected to either frequent heavy braking or a lack of regular brake inspections. While high mileage alone doesn’t guarantee mechanical failure, it does necessitate heightened scrutiny of consumable components, suspension integrity, and drivetrain health to mitigate risks of premature wear or unexpected breakdowns. Given the recurring MOT failures and high mileage, the prospective buyer should conduct a thorough mechanical inspection to confirm the current condition of the brake system and drivetrain. First, visually inspect the front brake pads and discs for signs of excessive wear, glazing, or warping beyond the 1.5 mm minimum thickness. Listen for uneven brake noise, which may indicate misalignment or binding calipers, and check for pulsations or vibrations during braking, which could signal warped discs or soft pads. The CV joint should be examined for leaks, excessive play, or unusual noises when accelerating, particularly from the near-side drive shaft. If the joint is confirmed to be failing, the buyer should expect significant costs for replacement, as CV joints are complex and expensive to repair. Additionally, the vehicle’s suspension should be inspected for signs of worn suspension bushes, coil spring failure, or binding control arms, as high mileage often accelerates these components’ degradation. A test drive should include acceleration checks for clunking noises from the CV joint, uneven tyre wear patterns, and any signs of drivetrain whining or grinding. For fluid systems, the buyer should verify the condition of the brake fluid, engine oil, and differential/transmission fluids, as prolonged use without servicing can lead to degradation, corrosion, or contamination. Brake fluid should be checked for moisture content, which can cause fluid to absorb water and reduce braking effectiveness; if the fluid is dark or has absorbed moisture, it should be replaced. Engine oil should be checked for metal particles or sludge, which may indicate wear or contamination. The differential and transmission fluids should also be inspected for signs of sludge or metallic debris, particularly given the high mileage. The tyre tread depth should be confirmed to be above the legal minimum of 1.6 mm, and the tyre walls should be examined for cracks, perishing, or signs of dry rot, which can compromise structural integrity. Finally, the battery should be tested for voltage and charge capacity, as standing vehicles or high mileage can accelerate battery degradation. If the battery is old or weak, it may require replacement, which can be costly but is essential for reliability. Given the vehicle’s age and usage profile, a full service history check is strongly recommended to confirm the timing of last fluid changes, brake pad replacements, and suspension servicing. If the service records are incomplete or missing, the buyer should prioritise these checks to avoid costly repairs down the line.