BMW 5-Series M5 (2005-2010) running costs and reliability

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Running costs rating: 1 out of 51.0

Written by Parkers Published: 6 June 2019

Miles per pound (mpp)

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

What is miles per pound?

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 19 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.

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If you’re in the market for a high performance executive saloon or estate then running costs probably aren’t too much of an issue. However bear in mind that the M5 is thirsty and although the official figures say it is capable of around 19mpg, you’ll be lucky to see that in everyday driving, with 14mpg a more realistic figure. Things such as tyres and brakes aren’t cheap and neither is BMW servicing while insurance is group 20 – the highest possible.

The M5 is certainly not a car to impress the environmentally friendly. The saloon averages just 20mpg while the estate manages only 19mpg and emissions are high – 344g/km of CO2 for the four door and 348g/km for the Touring.

We’ve had no reported of problems and the M5 should prove as reliable as the rest of the BMW range. The three year warranty should also give peace of mind.