BMW 645ci – All you need to know

If you want a powerful, high-performing, easy to handle, luxurious, and powerful gran touring coupe, the BMW 645ci is an ideal option. However, this car has both good and bad sides that interested buyers should know about before spending their hard-earned money.

In this article, we’re diving into everything that you need to know about the BMW 645ci 6-Series. The BMW 645ci is a 2door coupe that can seat up to four people. Astonishingly, it is one of the niche cars created by BMW, that’s why you shouldn’t expect to see most of their type on the road.

History of the BMW 645ci 6-Series

The BMW 645ci is among the BMW 6-Series grand tourers produced from 1976. The BMW 6-Series succeeded the BMW E9 and it’s in the fourth generation. However, the BMW 645ci was produced from 2004 to 2005. So, it only has two model years. Both model years come with a coupe and convertible.

Both cars feature a naturally aspirated N62 V-8 engine. This engine is powerful and performs at a high level. But it also has some common BMW problems that users should be aware of. 

Features of the BMW 645CI


Despite being almost 20 years old, the 2005 BMW 645ci coupe is a lovely and luxurious car. This 2door coupe comes with a streamlined and sporty design. Unlike the present BMW models that feature a large kidney grille, this unit has a small but well-designed kidney grille that complements its body.

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Besides, the sporty but clearly defined body oozes luxury and opulence. What’s more, it comes with a hard rooftop but with a sunroof on top. This allows light to enter the car and gives it a lively vibe. The interior is also well-done with top-notch materials that make it stand out from its competitors.

Some of the exceptional features that the BMW 645ci comes with are leather seat trim, front air conditioning/dual-zone automatic control, heated mirrors, navigation system, 18-inch silver aluminum wheels, tilting glass sunroof, Xenon adaptive headlamps, and Key fob Remote keyless entry.

The 2005 BMW 645ci 6-Series 2dr coupe has a wheelbase of 109.4-inches, a length of 190.2-inches, a width of 73.0-inches, and a height of 54.1-inches. According to these dimensions, the BMW 645ci is a pretty big car, enough to carry a family of four.


Like most BMW sports or high-performance models, the 645ci comes with both a coupe and a convertible. Despite their body type, these cars feature the same engine and deliver the same numbers of horsepower.

The BMW 645ci comes with the N62 engine that features a 4.4-liter capacity with V8. Additionally, it has a 6-speed manual transmission and a rear-wheel-drive system. The engine produces a maximum of 325 hp and 330 lb-ft of torque. It can also accelerate from 0 to 60 in 5.6 seconds and has a maximum speed of 155 mph.

In terms of performance, the BMW 645ci performs exceptionally well. Additionally, it has nifty handles, offering the driver the ultimate driving experience. And since it is a rear-wheel-drive system, this car has got excellent traction, meaning it can cruise on snow smoothly, unlike a BMW with an FWD system.

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Comfort and cargo space

When it comes to comfort, the BMW 645ci 6-Series is very comfortable as it comes with large and cozy leather seats. It also has considerate legroom and headroom, both in the front and rear. Aside from having a spacious cabin, this gran touring coupe also comes with a spacious cargo area. It has a total of 13.0 cubic ft of cargo space.

Nonetheless, it is also vital to note that even though the BMW 645ci is a four-passenger car, it comes with only two doors. But this doesn’t affect its comfort or space.


Since the BMW 645ci is equipped with a 4.4-liter V8 engine, it is a guzzler. As a result, it is not fuel-efficient compared to other BMW series, such as the 3 and 5 series. It has an EPA rating of 15 mpg in the city, 22 mpg on the highway, and a combined 17 mpg.


Pricewise, the BMW 645ci is quite expensive, despite being an old model. This is because of the high-end features and technological advancements that it comes with. Besides, the convertible is costlier than the coupe. While the BMW 645ci coupe goes for about $69,900, its convertible version goes for around $76,900.


What are the common problems of the BMW 645ci?

BMW 645CI 6-Series may be a high-performing and powerful car, but it also has several issues that owners should look out for. Some of the common BMW 645ci problems include oil leaks, engine misfire, electric faults, ignition coil failure, fuel pump problems, coolant pipe leak, and much more.

If your BMW 645ci is facing one of the above problems, it is best if you take it to the nearest BMW service center for proper care and to avoid voiding the warranty.

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More about the BMW 645ci problems.

Is BMW 645ci a worthy investment?

It depends on what you’re looking for. If you want a luxurious, powerful, and high-performance coupe without minding the price, this is an excellent car for you. But if you desire a reliable, low-maintenance, and fuel-efficient BMW model, this is not the coupe for you.

How fast is the BMW 645ci?

The BMW 645ci can compete with some of the best gran touring coupes on the market. This is because it comes with an excellent 155 mph as its top speed. What’s more, it can accelerate from 0 to 60 in 5.6 seconds, which is outstanding.

Bottom line

The BMW 645ci may be a niche car, but it is one of the best gran touring coupes ever made by BMW. It is comfortable, powerful, safe, luxurious, and with high-end features. The car is also beautifully designed and is easy to handle. Nonetheless, it has multiple issues that interested buyers should be ready to handle, and it’s also one of the least BMW models.

All in all, the BMW 645ci is an outstanding car that will provide value for money. Besides, one can pick between a coupe or convertible, depending on their taste.

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Edwin Odipo

Why do you love writing about cars? Cars make our lives easy. You can visit your distant friend, relative or even rush to the grocery store a few miles from your home with a lot of ease. Imagine how life was before the invention of cars?? To me, cars are a blessing that made life more convenient.

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