The first-generation Mazda 6, internally designated GG (sedan/hatchback) and GY (wagon), was launched in 2002 as a replacement for the Mazda 626. It quickly gained a reputation for its sporty handling, attractive design, and good value for money, positioning itself as a more engaging alternative to segment leaders like the Toyota Camry and Honda Accord. It was a key model in Mazda's 'Zoom-Zoom' era. A facelift was introduced in 2005, bringing minor styling tweaks, interior updates, and some mechanical refinements, notably to the diesel engines. While generally well-regarded for its driving dynamics and petrol engine reliability, the diesel variants, particularly the earlier ones, presented more significant reliability challenges.
The first-generation Mazda 6 (GG/GY) remains an attractive proposition for those seeking a mid-size car with a sporty edge. Its petrol engines, particularly the 1.8L and the North American 3.0L V6, offer a good balance of performance and reliability, making them generally safe bets. However, the 2.0L and 2.3L MZR petrol engines require attention to VVT and oil consumption. The high-performance MPS/Mazdaspeed6 is a niche choice for enthusiasts, but demands meticulous maintenance due to its complexity. For the 2.0L MZR-CD diesel, caution is paramount. While offering excellent fuel economy, the known issues with injectors, turbos, and DPFs (especially on pre-facelift RF5C engines) can lead to very expensive repairs. If considering a diesel, a full service history, evidence of proactive maintenance (injector seal replacements), and a thorough pre-purchase inspection by a Mazda specialist are absolutely essential. Prioritize facelift (RF7J) models, and ensure it has been used for longer journeys to prevent DPF issues. Overall, a well-maintained petrol Mazda 6 is a recommended purchase for its driving pleasure and value. A diesel, however, should only be considered if its history is impe