The BMW M5, a legendary nameplate synonymous with high-performance luxury sedans, has captivated enthusiasts for decades. Choosing the right M5 can be a daunting task, considering the various generations and their unique characteristics. This guide will navigate you through the best and worst years of the M5, helping you make an informed decision whether you're a seasoned collector or a first-time buyer.

BMW M5 Generations: At a Glance

Generation (Production Years) Code Name Key Features & Considerations
E28 (1985-1988) E28 Hand-built, iconic status, high maintenance, rust prone.
E34 (1988-1995) E34 Inline-6 engine, more refined, potential for VANOS issues.
E39 (1998-2003) E39 V8 engine, considered a sweet spot, potential for cooling system problems.
E60 (2005-2010) E60 High-revving V10 engine, SMG transmission concerns, complex electronics.
F10 (2011-2016) F10 Turbocharged V8 engine, more comfortable, potential for oil consumption.
F90 (2017-2024) F90 All-wheel drive, powerful, technologically advanced, potential for electronic gremlins.

Detailed Explanations

E28 (1985-1988)

The E28 M5 holds a special place in automotive history as the very first M5. It was hand-built and featured a modified version of the M1 supercar's inline-six engine. This makes it highly desirable among collectors, but also means it's the most expensive and requires the most meticulous maintenance. Due to its age, rust is a common concern, and finding parts can be challenging. Its raw, analog driving experience is unparalleled, but it's not a practical daily driver for most.

E34 (1988-1995)

The E34 M5 is often considered a classic blend of performance and usability. It continued with the inline-six engine, offering a slightly more refined driving experience than the E28. While generally reliable, the VANOS (variable valve timing) system can be a source of problems, requiring potentially expensive repairs. The E34 offers a good balance between classic charm and modern conveniences, making it a more accessible option for enthusiasts.

E39 (1998-2003)

The E39 M5 is widely regarded as the "sweet spot" in the M5 lineage. It was the first M5 to feature a V8 engine, providing a significant increase in power and torque. The E39 M5 is known for its exceptional handling, comfortable ride, and timeless design. However, like all older BMWs, the cooling system is a known weak point. Regular maintenance and preventative replacements are crucial to avoid overheating issues. This generation is cherished for its blend of performance, luxury, and relatively simple technology.

E60 (2005-2010)

The E60 M5 is arguably the most controversial M5 generation, primarily due to its high-revving V10 engine and the available SMG (Sequential Manual Gearbox) transmission. The V10 engine is a marvel of engineering, but it's also known for its complexity and potential for expensive repairs. The SMG transmission, while offering quick shifts, can be jerky and unreliable. Many prefer the manual transmission offered in some markets. The E60's aggressive styling and unique engine make it a love-it-or-hate-it proposition. Moreover, the iDrive system, while innovative for its time, can be frustratingly complex and prone to glitches.

F10 (2011-2016)

The F10 M5 marked a significant shift for the M5, introducing a turbocharged V8 engine. This provided a significant boost in power and torque compared to the E60. The F10 M5 is more comfortable and refined than its predecessors, making it a better daily driver. However, some owners have reported oil consumption issues, requiring regular monitoring and topping up. The F10 is a powerful and luxurious sedan, but some purists miss the raw, naturally aspirated feel of the earlier M5s.

F90 (2017-2024)

The F90 M5 introduced all-wheel drive (xDrive) for the first time in the M5's history. This provides exceptional traction and launch capabilities. The F90 M5 is the most powerful and technologically advanced M5 to date. While incredibly capable, the complex electronics can be a source of potential problems. Some drivers also find the all-wheel-drive system to diminish the traditional M5 driving experience. The F90 represents the pinnacle of M5 performance, but it comes at the cost of increased complexity and potential maintenance costs.

Best Years of the BMW M5

While each generation has its merits, some years stand out as particularly desirable:

  • E39 (1998-2003): Widely regarded as the best all-around M5, offering a perfect blend of performance, luxury, and driving experience. The V8 engine is powerful and relatively reliable, and the E39's timeless design remains appealing.

  • F10 (2011-2016): A great choice for those seeking a modern, comfortable, and powerful M5. The turbocharged V8 provides effortless performance, and the F10 offers a more refined driving experience than previous generations.

  • F90 (2017-2024): The ultimate M5 in terms of performance and technology. The all-wheel-drive system provides incredible traction, and the F90 is packed with features. However, be prepared for potential electronic issues and higher maintenance costs.

Years of the BMW M5 to Potentially Avoid (or Approach with Caution)

  • E60 (2005-2010) with SMG Transmission: The V10 engine is amazing, but the SMG transmission is known for its unreliability and jerky shifts. Opt for a manual transmission if possible, or be prepared for potential SMG repairs.

  • Early E34 (1988-1992): These early models may be more prone to rust and have less advanced features than later E34s. Ensure a thorough inspection before purchasing.

  • Any M5 with Neglected Maintenance: Regardless of the generation, an M5 that hasn't been properly maintained is a recipe for disaster. Always prioritize a well-maintained example with documented service history.

Key Considerations When Buying an M5

  • Budget: M5 prices vary widely depending on the generation, condition, and mileage. Determine your budget and stick to it.

  • Maintenance History: A comprehensive maintenance history is crucial. Look for examples with regular servicing, especially those with records of preventative maintenance.

  • Pre-Purchase Inspection (PPI): Always get a PPI from a qualified BMW mechanic before purchasing any used M5. This can help identify potential problems before they become major headaches.

  • Driving Experience: Consider what you're looking for in an M5. Do you want a raw, analog driving experience or a more modern, comfortable ride?

  • Potential Repair Costs: Be prepared for potentially high repair costs, especially with older or more complex models. Research common issues and factor these costs into your budget.

Frequently Asked Questions

Which M5 is the most reliable? The E39 M5 is generally considered the most reliable, offering a good balance of performance and simplicity.

Which M5 is the fastest? The F90 M5 is the fastest, thanks to its powerful turbocharged V8 and all-wheel-drive system.

Which M5 is the most expensive to maintain? The E60 M5 and F90 M5 are typically the most expensive to maintain due to their complex engines and electronics.

Is the SMG transmission on the E60 M5 reliable? No, the SMG transmission is known for its unreliability and jerky shifts.

Should I buy a modified M5? Modified M5s can be appealing, but be cautious. Ensure the modifications were done properly and that they haven't negatively impacted reliability.

Conclusion

Choosing the "best" BMW M5 ultimately depends on your individual needs and preferences. The E39 M5 remains a beloved classic, while the F10 and F90 offer modern performance and luxury. By carefully considering the pros and cons of each generation and conducting thorough research, you can find the perfect M5 to suit your driving style and budget. Always prioritize a well-maintained example and be prepared for the unique challenges and rewards of owning a high-performance machine.