The BMW 735, a staple of the luxury sedan market, represents a blend of performance, comfort, and prestige. However, not all model years are created equal. This guide will navigate you through the best and worst years of the BMW 735, helping you make an informed decision whether you're considering a purchase or simply want to understand the model's history.
This guide aims to provide comprehensive insight into the BMW 735, highlighting the years that offer the most reliable performance and those that might present more challenges. By understanding the nuances of each model year, you can make a confident choice and enjoy the luxury and driving experience the 735 is known for.
| Model Year | Key Features/Improvements | Potential Issues/Concerns |
|---|---|---|
| 1985-1987 (E23) | Classic styling, robust M30 engine, relatively simple electronics | Rust, particularly around wheel arches and sills; high mileage potential; aging rubber components; limited modern features |
| 1988-1992 (E32) | Enhanced luxury, improved electronics, V12 option available (750i) | More complex electronics, potential for electrical gremlins; Self-Leveling Suspension (SLS) failure; cooling system issues; higher maintenance costs |
| 1993-1994 (E32) | Minor cosmetic updates, refinement of existing features | Continuation of E32 issues: electronics, SLS, cooling system; potential for increased wear and tear due to age |
| 1997-2001 (E38) | Modern styling, advanced technology, improved handling | Complex electronics (Navigation, iDrive); cooling system vulnerabilities; Vanos issues; transmission problems; higher repair costs |
| 2002-2005 (E65/E66) | Revolutionary (and controversial) styling, iDrive system, advanced features | iDrive complexity and reliability; cooling system problems; valve stem seal issues; high maintenance and repair costs; battery drain issues |
| 2006-2008 (E65/E66) | Facelifted styling, improved iDrive system, refinement of features | Continuation of E65/E66 issues, although slightly improved; still complex electronics; cooling system problems; high maintenance costs |
| 2009-2015 (F01/F02) | Modern styling, advanced technology, improved fuel efficiency | N63 engine issues (oil consumption, turbocharger problems); complex electronics; air suspension problems; high repair costs |
Detailed Explanations
1985-1987 (E23)
The E23 generation of the 735i represents the classic BMW experience. Powered by the robust M30 inline-six engine, these models are known for their relative simplicity and reliability compared to later generations. The pre-1988 models have fewer electronic components, making them less prone to electronic failures. The M30 engine is known for its longevity if properly maintained. However, potential buyers should be aware of rust issues, especially in areas prone to salt exposure. Aging rubber components like hoses and seals will also need attention. While lacking modern amenities, the E23 offers a pure and engaging driving experience.
1988-1992 (E32)
The E32 735i brought a significant step up in luxury and technology. This generation featured improved electronics and more sophisticated features. While the 735i still used the M30 engine in most markets, the E32 also introduced the option of a V12 engine in the 750i. This generation marked a move towards more complex systems. However, this complexity also introduced potential problems. Electrical gremlins can be a common issue, and the Self-Leveling Suspension (SLS) is known to fail, requiring expensive repairs. Cooling system issues are also a recurring concern. While offering a more refined driving experience, the E32 demands more diligent maintenance.
1993-1994 (E32)
These later E32 models represent a refinement of the previous years. They received minor cosmetic updates and improvements to existing features. However, they still share the same potential issues as the earlier E32 models, including electrical problems, SLS failure, and cooling system weaknesses. Given their age, these models are likely to have accumulated significant wear and tear. Thorough inspection and maintenance records are crucial when considering a purchase.
1997-2001 (E38)
The E38 735i (and 740i in many markets) is often considered one of the best-looking 7 Series generations. It boasts modern styling, advanced technology for its time, and improved handling. However, the E38 also introduced more complex electronics, including the early versions of the iDrive system (though not in all markets/years). The E38 is known for its cooling system vulnerabilities, Vanos issues (variable valve timing), and potential transmission problems. The increased complexity translates to higher repair costs. Careful maintenance is essential to keep an E38 running reliably. This generation offered a powerful V8 engine in most markets, replacing the inline-six found in earlier 735i models.
2002-2005 (E65/E66)
The E65/E66 generation was a radical departure in terms of styling and technology. Its controversial design and the introduction of the iDrive system were met with mixed reactions. While offering a plethora of advanced features, the E65/E66 is known for its iDrive complexity and reliability issues. This generation is notorious for cooling system problems, valve stem seal issues, and battery drain problems. The high maintenance and repair costs associated with the E65/E66 make it a less desirable choice for many enthusiasts. The 735i in some markets (like Europe) was powered by a 3.6L inline-six engine, while the 745i used a V8.
2006-2008 (E65/E66)
The facelifted E65/E66 models addressed some of the initial criticisms with improved styling and a refined iDrive system. While these improvements made the car more appealing, the underlying issues remained. The complex electronics, cooling system problems, and high maintenance costs continued to plague this generation. While slightly improved over the earlier models, the 2006-2008 E65/E66 still requires careful consideration and a thorough inspection before purchase.
2009-2015 (F01/F02)
The F01/F02 generation brought a return to more conventional styling and a focus on modern technology and fuel efficiency. The 735i, where offered, was powered by a turbocharged inline-six engine. However, some variants of this generation (primarily those with the N63 V8 engine, often found in the 750i) are known for oil consumption and turbocharger problems. Air suspension problems and complex electronics can also lead to high repair costs. Despite its modern features, the F01/F02 requires diligent maintenance and careful attention to potential issues.
Frequently Asked Questions
Which BMW 735 generation is the most reliable?
The E23 (1985-1987) is generally considered the most reliable due to its simpler design and robust M30 engine.
What are the most common problems with the E32 735i?
Common issues include electrical gremlins, Self-Leveling Suspension (SLS) failure, and cooling system problems.
Is the E38 735i a good car?
The E38 is a desirable car with modern styling and advanced features, but it's known for cooling system vulnerabilities and potential transmission problems, requiring careful maintenance.
What are the main issues with the E65/E66 735i?
The E65/E66 is plagued by iDrive complexity, cooling system problems, valve stem seal issues, and battery drain, leading to high maintenance costs.
Are the later E65/E66 models (2006-2008) better than the earlier ones?
Yes, the facelifted models have improved styling and a refined iDrive system, but they still share the same underlying issues, although to a lesser extent.
What should I look for when buying a used BMW 735?
Check for rust, electrical issues, cooling system problems, and ensure the maintenance history is well-documented. Pay attention to the specific issues common to each generation.
Is the 735i a good investment?
While not typically considered an investment vehicle, well-maintained examples of the earlier generations (E23, E32) can appreciate in value due to their classic status.
How much does it cost to maintain a BMW 735?
Maintenance costs vary by generation, but expect higher costs for models with more complex electronics and advanced features (E38, E65/E66, F01/F02).
Are parts readily available for older BMW 735 models?
Parts availability varies by generation, with some parts becoming harder to find for the older E23 and E32 models. However, many aftermarket options exist.
Conclusion
Choosing the best BMW 735 depends on your priorities and budget. The E23 offers a classic driving experience with relative simplicity and reliability, while the E38 provides a blend of modern styling and advanced features (for its time), albeit with increased maintenance demands. The E65/E66 generation is generally best avoided due to its complexity and reliability issues. Consider your tolerance for maintenance and potential repairs when making your decision, and always conduct a thorough inspection before purchasing any used BMW 735.