The Best Years For Bmw 320d And Some To Avoid

The BMW 320d has long been a popular choice for those seeking a blend of performance, fuel efficiency, and driving pleasure. However, like any car, some model years are more reliable and offer a better ownership experience than others. This guide will help you navigate the different generations and identify the best (and worst) years for the BMW 320d.

BMW 320d Model Year Comparison: Key Features & Reliability

Detailed Explanations

E46 (1998-2005): The Original 320d

The E46 was the first iteration of the 320d and offered a more compact and raw driving experience compared to later models. Its M47 engine, while relatively simple, can suffer from turbocharger failures due to age and wear. Swirl flap issues are also common, particularly in pre-facelift models. These flaps, designed to improve combustion, can break and be ingested into the engine, causing significant damage. Injector problems can also arise, leading to poor fuel economy and rough running. Finally, rust is a significant concern, particularly around the wheel arches and sills.

E90/E91/E92/E93 (2005-2013): The N47 Era

The E90 generation brought improvements in handling and technology, but it's most notorious for the N47 engine's timing chain issues. This issue, most prevalent in models produced before 2011, can lead to catastrophic engine failure if not addressed. The timing chain guides wear down, causing the chain to stretch and eventually break. Other potential issues include diesel particulate filter (DPF) problems, especially if the car is primarily used for short journeys. Injector issues and EGR valve problems can also occur, leading to reduced performance and increased emissions. Electric water pump failures are another common issue, leading to overheating.

F30/F31/F34 (2012-2019): The B47 Improvement (Mostly)

The F30 generation saw the introduction of the B47 engine, which is generally more reliable than the N47. However, the B47 is still susceptible to timing chain issues, although the frequency is significantly lower. A more common issue is EGR cooler leaks/fires, which can be a serious safety concern. DPF clogging remains a potential problem, especially with short trips. Some owners have also reported electrical gremlins and the potential for oil leaks. While generally a more reliable platform than the E90, thorough maintenance is still crucial.

G20/G21 (2019-Present): The Modern 320d

The G20 generation represents the latest iteration of the 320d, featuring a refined interior, advanced technology, and improved fuel economy. While generally considered to be reliable, it's still relatively new, so long-term reliability data is still emerging. The complex electronics can be expensive to repair if issues arise. Software glitches are a possibility, as with any modern car. With its mild-hybrid technology, it offers the best fuel economy and emissions of the 320d range.

Frequently Asked Questions

• Which BMW 320d is the most reliable? The F30 generation (2012-2019) with the B47 engine is generally considered the most reliable, but still requires careful maintenance.

• What is the biggest problem with the N47 engine? The N47 engine's biggest problem is its timing chain, which can fail and cause catastrophic engine damage.

• How can I prevent timing chain issues in my 320d? Regular oil changes with the correct specification oil are crucial. Listen for any unusual rattling noises from the engine, especially on startup, and consider replacing the timing chain preventatively if you own an N47 engine.

• Are diesel BMWs reliable? Generally, yes, but they require diligent maintenance. Regular servicing, including oil changes and DPF regeneration, is essential to avoid costly repairs.

• Is the BMW 320d expensive to maintain? It can be, especially if major components fail. Preventative maintenance and choosing a reputable mechanic can help minimize costs.

• Should I buy a pre-2011 BMW 320d with an N47 engine? It's risky due to the potential for timing chain failure. Only consider it if the timing chain has been replaced or if you're prepared to replace it yourself.

• What should I look for when buying a used BMW 320d? Check the service history, listen for engine noises, inspect for rust, and ensure all electronics are functioning correctly.

• What is the average fuel economy of a BMW 320d? Fuel economy varies depending on the generation and driving style, but you can expect around 45-60 mpg.

• What is the difference between the 320d and the 330d? The 330d has a larger and more powerful engine, offering significantly greater performance.

• Is the xDrive (all-wheel drive) version of the 320d worth it? It provides improved traction and stability, especially in adverse weather conditions, but it can slightly reduce fuel economy.

Conclusion

Choosing the right BMW 320d involves carefully weighing the pros and cons of each generation. While the F30 with the B47 engine generally represents the best balance of reliability and features, thorough research and inspection are crucial before making a purchase. Remember to prioritize preventative maintenance and address any potential issues promptly to ensure a long and enjoyable ownership experience.