This car has been superseded by a newer model, click here to go to the latest BMW X6 review.

Parkers overall rating: 3.9 out of 5 3.9

Miles per pound (mpp) Miles per pound (mpp)

Diesel engines 3.6 - 4.2 mpp
Low figures relate to the least economical version; high to the most economical. Based on WLTP combined fuel economy for versions of this car made since September 2017 only, and typical current fuel or electricity costs.

Fuel economy

Diesel engines 29.4 - 33.6 mpg
  • Diesel-only engine line-up
  • No hybrids or plug-in hybrids
  • Don’t expect any to be cheap to run

If you can afford one in the first place, then chances are BMW X6 running costs should be of little concern to you. However, there’s no getting away from the fact the the X6 in whatever form you choose will prove the most costly to run in day to day situations.

The xDrive30d and xDrive40d M Sport are the most economical, returning 40.3mpg (WLTP) with CO2 emissions of 183g/km. These mean a 37% Benefit-in-Kind (BIK) company car tax bracket – the highest and most expensive there is. The M50d offers more performance, but fuel economy drops still further to 36.2mpg, with CO2 climbing to 205g/km.

And if you tick the Service Inclusive box when ordering your X6 you’ll only pay around £410 for five years or 60,000 miles worth of servicing and routine maintenance costs – which is something of a bargain.

Is it eco-friendly?

Unsurprisingly BMW X6 emissions aren’t headline grabbers. Choose the most powerful diesel, the M50d, and you’ll benefit from much of that car’s performance but with CO2 emissions of only 174g/km. But by far the cleanest, and most impressive, is the X6 xDrive 30d SE which only emits 157g/km of CO2.

We’ve seen these engines before. The X6 xDrive 30d SE’s 3-litre six-cylinder diesel is in a variety of models, and the M50d and 50i in only a few less, so BMW X6 reliability should be fine. And with that we can confidently predict that the engines will be just as reliable in this installation as they are in those, while the familiar tried and tested eight-speed automatic gearbox will follow the same suit.

Will it break down?

There’s no quibbles about build quality either, as the X6 appears incredibly well-built both inside and out, and though the cabin leans towards luxury rather than utilitarianism none of it feels like it’ll suffer from hard use.

Recent BMW scores in the JD Power Vehicle Dependability Survey don’t look good, though – with the German carmaker coming plumb last with a reported 181 faults per 100 cars.

BMW X6 (2014) M50d engine

Ongoing running costs

Road tax (12 months) £220 - £630
See tax rates for all versions
Insurance group 41 - 50
How much is it to insure?