Audi A4 Mk4 (B8)

The fourth-generation Audi A4 (B8), produced from 2008 to 2016, was a landmark model that moved the A4 closer than ever to the Audi A6 in terms of refinement, technology, and interior space. Utilizing the "MLB" platform, it featured a longer wheelbase and improved weight distribution, significantly enhancing its handling and ride comfort compared to its predecessors. In the UK, it was a dominant force in the executive segment, prized for its sharp LED daytime running lights, class-leading cabin quality, and the prestigious badge that made it a staple of company car parks and suburban driveways alike. However, the reliability record of the B8 is overshadowed by a few high-profile and potentially ruinous mechanical issues. Most notorious is the excessive oil consumption on pre-2012 2.0-litre TFSI petrol engines, caused by defective piston rings that often require a complete engine rebuild to rectify. Early production models also suffer from timing chain tensioner failures, and front-wheel-drive automatic versions utilize the Multitronic CVT gearbox, which has a well-earned reputation for expensive electronic and mechanical breakdowns. Diesel models are generally more robust, but high-mileage 2.0 TDIs should be checked for water pump leaks and EGR valve issues. When buying a used B8 A4 in the UK, the 2012-onwards "facelift" models are the most recommended, as they resolved the worst of the oil-burning issues and introduced improved infotainment and safety tech. Prospective owners should demand evidence of regular oil level monitoring and, if buying a pre-facelift petrol, proof of the "piston ring fix." It is also important to test the electronic parking brake and all MMI (Multi Media Interface) functions thoroughly. A well-maintained post-facelift 2.0 TDI (150PS or 177PS) manual remains one of the most sensible and high-quality executive cars on the used market.