Audi Q7 Mk2 (4M)

The second-generation Audi Q7 (4M), launched in 2015, was a significant technological leap forward, shedding nearly 325kg of weight to offer a much more agile and refined driving experience. Built on the "MLB Evo" platform shared with the Bentley Bentayga and Porsche Cayenne, it establishment itself as the benchmark for luxury seven-seat SUVs, combining a cavernous interior with a minimalist, high-tech dashboard. In the UK, it has become the ultimate family workhorse for those who want a prestigious badge, class-leading refinement, and the security of permanent Quattro all-wheel drive. Reliability for the Mk2 Q7 is generally high, reflecting its premium engineering, but its complexity means that used buyers must investigate specific mechanical and electronic themes. The 3.0-litre TDI diesel engine is world-class, but early Euro 6 models (2015–2017) are notorious for failures of the AdBlue sensors and NOx sensors, which can trigger an expensive "no-start" countdown on the dashboard. Additionally, models equipped with air suspension are prone to leaking air bags as they age, and the Q7 is known for "eating" front tyres rapidly if the alignment is not perfectly maintained. Furthermore, some owners have reported frustrating software glitches with the MMI infotainment system and occasional failures of the motorized tailgate. When buying a used 4M Q7 in the UK, the focus should be on maintenance history and verifying that all manufacturer software updates have been applied. Prospective owners should carefully test the air suspension (if fitted) through all height settings and verify that the AdBlue system is fault-free. It is also important to verify that the 8-speed Tiptronic transmission has had its oil changed strictly every 5 years or 75,000 miles to maintain its longevity. For the best used experience, a 2018-onwards model is highly recommended, as many of the early production refinements were applied by this stage. A well-maintained Mk2 Q7 remains one of the most capable and prestigious long-distance vehicles available on the used market.