The BMW 745, particularly the E65/E66 generation, represents a bold and sometimes controversial chapter in BMW's history. Known for its advanced technology and distinctive styling, it's a car that elicits strong opinions. This guide aims to provide a clear and objective assessment of the best and worst years for the 745, helping you make an informed decision whether you're considering a purchase or already own one.
This guide dives deep into the years of production of the 745, specifically the E65/E66 generation (2002-2008). It will provide a comprehensive overview of the best years to buy and the years to avoid, based on reliability, common problems, and overall ownership experience.
| Year | Key Considerations | Potential Issues |
|---|---|---|
| 2002-2003 | First years of production, new iDrive system. | Significant iDrive issues, transmission problems, coolant leaks, electrical gremlins. Generally considered the least reliable years. |
| 2004-2005 | Minor improvements to iDrive, some mechanical tweaks. | iDrive still problematic, although less so than earlier years. Continued reports of coolant leaks, valve stem seal issues, and transmission concerns. |
| 2006-2008 | Facelift model (LCI), improved iDrive, engine refinements. | More reliable iDrive, improved engine cooling, fewer reported transmission issues. Still susceptible to age-related problems common to all E65/E66 models, such as suspension component wear and electrical system quirks. |
Detailed Explanations
2002-2003: First Years of Production, New iDrive System
These were the initial years of the E65/E66 745, marking a significant departure in design and technology for BMW. The introduction of the iDrive system was a major feature, but it was also a source of considerable frustration. These early models are generally considered the least reliable due to a combination of teething problems with the new technology and inherent design flaws.
Significant iDrive Issues: The first generation iDrive system was notoriously complex and unintuitive. Users frequently complained about its difficulty of use, slow response times, and tendency to freeze or crash. Navigating menus and controlling various vehicle functions could be a frustrating experience.
Transmission Problems: The automatic transmission in these early models was prone to issues, including harsh shifting, slipping, and outright failure. Many owners reported needing to replace or rebuild the transmission prematurely.
Coolant Leaks: Coolant leaks were a common problem, often stemming from the expansion tank, radiator hoses, or water pump. These leaks could lead to overheating and potential engine damage if not addressed promptly.
Electrical Gremlins: Early E65/E66 models were plagued by a variety of electrical problems, ranging from malfunctioning sensors to issues with the car's computer systems. These gremlins could be difficult to diagnose and resolve, leading to costly repairs.
2004-2005: Minor Improvements to iDrive, Some Mechanical Tweaks
BMW addressed some of the initial problems in these model years, making minor improvements to the iDrive system and implementing some mechanical tweaks. While reliability improved somewhat, these models still suffered from many of the same issues as the earlier years.
iDrive Still Problematic: Although improved, the iDrive system remained a source of frustration for many owners. While the software was updated, the underlying hardware limitations still resulted in slow response times and occasional glitches.
Continued Reports of Coolant Leaks: Coolant leaks remained a common issue, indicating that the underlying design flaws had not been fully addressed. Owners continued to report problems with the expansion tank, radiator hoses, and water pump.
Valve Stem Seal Issues: These models were also prone to valve stem seal issues, which could lead to excessive oil consumption and blue smoke from the exhaust. Repairing this problem could be expensive, as it often required removing the cylinder heads.
Transmission Concerns: While the transmission problems were less frequent than in the earlier years, they still occurred. Owners reported similar issues with harsh shifting, slipping, and premature failure.
2006-2008: Facelift Model (LCI), Improved iDrive, Engine Refinements
The 2006-2008 models represent the facelifted (LCI - Life Cycle Impulse) version of the E65/E66 745. These models featured significant improvements to the iDrive system, engine refinements, and updated styling. They are generally considered the most reliable years of the E65/E66 generation.
More Reliable iDrive: The iDrive system was significantly improved in the facelifted models. The software was updated, and the hardware was upgraded, resulting in a much more responsive and user-friendly system.
Improved Engine Cooling: BMW addressed the cooling issues that plagued earlier models, resulting in fewer coolant leaks and a more reliable cooling system. The expansion tank and radiator hoses were redesigned to improve durability.
Fewer Reported Transmission Issues: The transmission was also improved in the facelifted models, with fewer reported issues of harsh shifting, slipping, and premature failure. The transmission software was also updated to improve shift quality and reliability.
Age-Related Problems: Even the most reliable E65/E66 models are still susceptible to age-related problems common to all cars. These include wear and tear on suspension components, such as control arms and bushings, as well as electrical system quirks that can develop over time. Regular maintenance and careful inspection are essential to keep these cars running smoothly.
Frequently Asked Questions
Which year of the BMW 745 is the most reliable?
The 2006-2008 (LCI) models are generally considered the most reliable due to improvements in the iDrive system and engine cooling.
What are the most common problems with the BMW 745?
Common problems include iDrive malfunctions (especially in early models), coolant leaks, transmission issues, and electrical gremlins.
Is the iDrive system in the early models difficult to use?
Yes, the first-generation iDrive system (2002-2005) was notoriously complex, unintuitive, and prone to freezing.
Are the later models (2006-2008) significantly better than the earlier ones?
Yes, the facelifted models (2006-2008) offer significant improvements in reliability and usability, particularly with the iDrive system.
Is the BMW 745 expensive to maintain?
Yes, the BMW 745 can be expensive to maintain due to the complexity of its systems and the cost of parts.
Should I avoid the 2002-2003 models?
Generally, yes. Unless you're a very skilled DIY mechanic and prepared for frequent repairs, the 2002-2003 models are best avoided.
What does "LCI" mean?
LCI stands for "Life Cycle Impulse," which is BMW's term for a mid-cycle refresh or facelift.
Are coolant leaks a major concern in all years?
While less prevalent in the 2006-2008 models, coolant leaks are still a potential issue due to the age of the vehicles.
Conclusion
The BMW 745 (E65/E66) presents a mixed bag. The 2006-2008 facelifted models offer the best balance of features and reliability, while the 2002-2003 models are best avoided due to their numerous issues. Thorough research, pre-purchase inspection, and a willingness to address potential maintenance needs are crucial for a positive ownership experience.