The Best Years For Bmw 650i And Some To Avoid

The BMW 650i, a grand tourer combining luxury and performance, has captivated enthusiasts for years. Choosing the right model year is crucial to ensure a rewarding ownership experience. This guide will delve into the best and worst years of the 650i, providing you with the information needed to make an informed decision.

BMW 650i Model Year Overview

Detailed Explanations

2006-2007 (E63/E64): These models represent the initial years of the E63 (coupe) and E64 (convertible) 650i. They feature the 4.8L N62 V8 engine, known for its smooth power delivery. The iDrive system was still in its early stages of development. The E63/E64 offered a blend of sporting performance and luxurious comfort, but they are also the most prone to certain issues.

Known for valve stem seal issues: The N62 engine in these years is notorious for valve stem seal failure. This leads to increased oil consumption, often manifested as blue smoke upon startup, especially after the car has been sitting for a while. Repairing this issue is labor-intensive and therefore expensive.

Potential for coolant leaks: The cooling system components in these early models are prone to leaks, particularly around the coolant transfer pipe, which runs between the cylinder heads. This is a common issue that needs to be addressed to prevent overheating.

Early iDrive system can feel dated: While revolutionary for its time, the early iDrive system in these models can feel clunky and less intuitive compared to modern infotainment systems. Its functionality is also limited compared to later versions.

Electronic gremlins are common: These models can be susceptible to various electronic issues, including problems with the sensors, control modules, and electrical wiring. Diagnosing and resolving these issues can be time-consuming and costly.

2008-2010 (E63/E64 LCI): These models received a mid-cycle refresh (LCI - Life Cycle Impulse), bringing minor styling updates and improvements to the iDrive system. While the 4.8L N62 V8 engine remained, BMW made some refinements. These models offer a slightly more refined driving experience compared to the earlier years.

Valve stem seal issues persist, though potentially less prevalent: While improvements were made, the valve stem seal issue remained a concern, although anecdotal evidence suggests that it might be less common in these later N62 engines. Regular monitoring of oil consumption is still recommended.

Coolant leaks remain a concern: The cooling system components were not significantly redesigned, so coolant leaks remained a potential issue. Regular inspection and maintenance are crucial to prevent problems.

iDrive improvements are noticeable, but still not as modern: The iDrive system received updates, making it more user-friendly and responsive. However, it still lacks the advanced features and connectivity of later iDrive versions.

2011 (E63/E64): This was the final year of the E63/E64 generation. Production numbers were limited, making these models relatively rare. They share similar characteristics and potential issues with the 2008-2010 models.

Similar concerns to 2008-2010 models: The 2011 models inherit the same potential issues as the 2008-2010 cars, including valve stem seal problems and coolant leaks.

Rarity may make parts sourcing slightly more challenging: Due to the limited production run, finding specific parts for the 2011 models might be slightly more difficult and potentially more expensive than for more common model years.

2012-2015 (F12/F13): This generation marked a significant departure with the introduction of the F12 (convertible) and F13 (coupe) 650i. The biggest change was the adoption of the 4.4L N63 twin-turbo V8 engine, paired with an 8-speed automatic transmission. The iDrive system received a major overhaul, and the overall driving experience was significantly improved.

Early N63 engines are notorious for oil consumption, turbocharger issues, fuel injector problems, and coolant leaks: The early N63 engines were plagued with reliability issues. The "hot-V" design, with the turbochargers located inside the V of the engine, contributed to extreme heat soak, which accelerated the deterioration of rubber and plastic components. This led to oil leaks, coolant leaks, and premature turbocharger failure. Fuel injector problems were also common, resulting in rough running and misfires.

Potential for timing chain issues: Some early N63 engines experienced timing chain issues, which could lead to catastrophic engine damage if not addressed promptly. Regular oil changes with high-quality synthetic oil are crucial to prevent this problem.

Complex electronics can lead to costly repairs: The F12/F13 generation features a complex array of electronic systems, which can be prone to failure. Diagnosing and repairing these issues can be expensive, requiring specialized tools and expertise.

High maintenance costs associated with the turbo engine: The N63 engine, due to its design and complexity, requires more frequent and specialized maintenance compared to the older N62 engine. This translates to higher overall maintenance costs.

2016-2018 (F12/F13 LCI): These models represent the mid-cycle refresh (LCI) for the F12/F13 generation. The most significant improvement was the introduction of the N63TU engine, which addressed many of the reliability issues that plagued the earlier N63. Styling was updated, and the iDrive system was further enhanced.

Improved N63TU engine addressing many of the earlier N63 issues: The N63TU engine featured a number of improvements, including revised turbochargers, improved cooling, and updated fuel injection system. These changes significantly reduced oil consumption, turbocharger failures, and fuel injector problems.

While significantly improved, the N63TU engine can still experience some oil consumption and occasional turbo issues: While much more reliable than the early N63, the N63TU engine could still experience some oil consumption, though to a much lesser extent. Occasional turbo issues were also reported, but they were far less frequent than in the pre-LCI models.

Complex electronics remain a potential source of problems: The complex electronic systems remained a potential source of problems, although BMW made efforts to improve their reliability.

Maintenance costs remain high, but generally lower than pre-LCI models: While maintenance costs remained higher than average due to the complexity of the engine and electronics, they were generally lower than those associated with the pre-LCI F12/F13 models.

2019 (F12/F13): This was the final year of the F12/F13 generation. Production numbers were limited, making these models relatively rare. They are generally considered the most reliable of the F12/F13 models, as they benefit from all the improvements made throughout the production run.

Generally considered the most reliable of the F12/F13 models: The 2019 models represent the culmination of all the improvements and refinements made to the F12/F13 generation. They are generally considered the most reliable of the bunch.

Similar, but less frequent, issues to 2016-2018 models: While the 2019 models are generally reliable, they can still experience some of the same issues as the 2016-2018 models, albeit less frequently.

Potential for high mileage examples to require significant maintenance soon: Even the most reliable cars will eventually require maintenance. High-mileage 2019 models may soon require significant maintenance, depending on how well they have been cared for.

Frequently Asked Questions

Which BMW 650i year is the most reliable? The 2019 BMW 650i is generally considered the most reliable due to the culmination of improvements made throughout the F12/F13 generation. However, the 2016-2018 models with the N63TU engine are also significantly more reliable than earlier models.

What are the common problems with the early N63 engine? The early N63 engine (2012-2015) is known for oil consumption, turbocharger failures, fuel injector problems, coolant leaks, and potential timing chain issues. The "hot-V" design contributed to heat soak, accelerating component deterioration.

Is the valve stem seal issue a major concern in all 650i models? The valve stem seal issue is most prevalent in the 2006-2007 models with the N62 engine, though it can also occur in later N62-equipped models (2008-2011), but perhaps to a lesser degree. The N63 engines do not suffer from this particular issue.

How much does it cost to replace valve stem seals on a 650i? Replacing valve stem seals is a labor-intensive job, typically costing between $3,000 and $5,000 due to the engine needing to be partially disassembled. Prices can vary depending on the mechanic and location.

Are BMW 650i cars expensive to maintain? Yes, BMW 650i cars, especially those with the N63 engine, can be expensive to maintain due to the complexity of the engine and electronics. Regular maintenance and preventative care are essential to minimize potential issues.

Conclusion

Choosing the right BMW 650i model year is crucial for a positive ownership experience. While the early E63/E64 models offer classic styling, they are prone to certain issues like valve stem seal failures. The later F12/F13 models, particularly the 2016-2019 versions with the N63TU engine, offer better performance and improved reliability, making them a more sensible choice for most buyers.