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BMW 6-Series Coupe (2004-2010) running costs and reliability

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Running costs rating: 3 out of 53.0

Written by David Ross Published: 6 June 2019

Miles per pound (mpp)

Reliable fuel consumption data for comparison purposes is not available for this model.

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Fuel economy

A more stringent standard for fuel economy (WLTP) was introduced from September 2017, and this model was not required to undergo that test. Its fuel economy measured under the previous test system was 23 - 40 mpg. However these figures are less likely to be achievable in real world driving and so should never be compared to another car's mpg which was measured under the newer, more realistic WLTP system.

View mpg & specs for any version

If you want to keep running costs reasonable then the 635d is the model to go for as it can average 41mpg, but the 630i isn’t too bad and is capable of 36mpg. BMW servicing isn’t cheap but the firm does offer a fixed price package called Service Inclusive. This covers the car for five years or 60,000 miles and costs between £800 and £900 (depending on which model you choose).

In October 2007 BMW introduced Efficient Dynamics to the 6-Series range and emissions and economy improved as a result. The greenest model is the 635d which emits 183g/km of CO2 and is capable of 41mpg.

The 6-Series is fantastically well engineered and material quality impresses. We’ve not heard any reports of problems and like the rest of the BMW range it should prove reliable and durable.