2015 Audi Q5 2.0L Diesel · J21 KCC

A serious safety failure for the front suspension in early 2024, combined with headlamp and tyre defects around the same period, dominates the mechanical profile of this 2015 Audi Q5. The most concerning entry is the dangerous defect recorded on 2024-03-01, where the nearside front lower suspension arm ball joint was deemed likely to become detached due to an incorrect component. This was coupled with major headlamp failures on the nearside and offside front units, involving excessive beam aim, insecure mounting, and severe light intensity reduction caused by water ingress. The vehicle passed on the very next attempt on 2024-03-04, but two advisories remained: a slightly damaged nearside front outer tyre and front service brakes that were fluctuating, albeit not excessively. By early 2025 the record returned to a clean pass, and on 2026-03-03 the vehicle again passed with no advisories. However, on the same date a separate failure was logged for cuts on both rear tyres deep enough to expose the ply or cords, meaning tyre replacement was required before a re-test pass was issued. The overall pattern suggests an isolated but severe suspension and lighting episode in 2024, with the rest of the history largely clean. With a recorded mileage of 102,341 miles over approximately eleven years, the vehicle averages around 9,300 miles per year, which is broadly typical for its age and class. There is a notable gap in testing between February 2022 and March 2024, where no MOT records exist despite the annual testing cycle that would apply. Such a gap often indicates the vehicle was either off the road or not actively used for an extended period, which can have implications for components that degrade with standing time, including brake discs corroding, tyres developing flat spots or sidewall cracking, and suspension bushes perishing. The mileage recorded at the 2022 test relative to the 2024 figures should be checked to confirm whether significant mileage was covered during that interval or whether the vehicle was largely stationary. Given the recorded mileage, the drivetrain, turbocharging system, and dual-clutch or automatic transmission will have experienced considerable working life, even at this average rate. Given the dangerous suspension ball joint failure recorded in 2024, the front suspension should be treated as the highest priority inspection area before purchase. A careful test drive over uneven surfaces and speed bumps is essential, specifically listening for clonks, knocking, or imprecise steering response from the front end. Any looseness, wandering steering, or uneven tyre wear across the front pair would suggest further deterioration of the control arms, drop links, or bushes following the previous repair. The front brake fluctuation advisory from the same 2024 test should also prompt a road test, ideally with the vehicle up to speed, looking for any pulling to one side, vibration through the steering wheel under heavy braking, or a spongy pedal that might indicate corroded discs, sticking calipers, or worn pads. It is worth inspecting all four wheels for heat marks after a short drive, as a binding caliper will reveal itself this way. The headlamp issues flagged in 2024, particularly water ingress causing severely reduced light intensity, are common on this generation of Q5 as the rear headlamp seals deteriorate with age. Check the headlamp internals for any condensation or misting, and verify that both units produce a sharp, even beam pattern with correct horizontal cut-off, as poorly aligned aftermarket LED conversions or water-damaged reflectors are frequent on higher-mileage examples. The recent tyre failures on both rear tyres suggest a need to inspect the existing rubber for age-related cracking, particularly on the sidewalls, and to confirm matching tread depths across the axle. Given the mileage and the suspension history, also examine the underside of the vehicle for any oil seepage from the engine or Haldex coupling, and check the condition of the exhaust mounting rubbers and heat shields, which often rattle on Q5s of this age.