Parkers overall rating: 4.2 out of 5 4.2

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

Petrol engines 4.6 - 5.5 mpp
Diesel engines 6.3 - 7.3 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

Petrol engines 21.7 - 25.7 mpg
Diesel engines 31.0 - 36.2 mpg
  • Entry-level diesel moderately inexpensive to run
  • Other versions require very deep pockets
  • Servicing and maintenance likely to be high

A car the size of the X7 won’t be especially cheap to run in any form, but go for the least-expensive diesel and it shouldn’t be too bad. The xDrive30d claims between 32.8-33.6mpg under the latest WLTP testing regime that better replicates real-world fuel efficiency.

Beyond that model, the X7's a thirsty beast, particularly if you like to exploit the engines' power and torque. Opt for the punchier M50d diesel and you'll be fortunate to get close to the official figures of 31.0-31.4mpg, but it's even more eye-watering if you go for a petrol. Should you do so, the xDrive40i is the better of the two at 24.6-24.8mpg, while the M50i - a model that packs a 4.4-litre V8 - is officially rated at 21.6-21.9mpg. With spirited driving, you'll be closer to the high-teens, not low-twenties.

2019 dark blue BMW X7 rear badge

Servicing and maintenance might be quite pricey, while consumables like the tyres will be costly as well as the smallest wheels are still 21 inches in size.

Be prepared to budget for these bits and bobs if you’re considering the X7.

As with fuel consumption, the X7’s CO2 emissions are high. The xDrive30d – again – is the best performer at 171g/km, which isn’t too bad. The M50d ups it to 185g/km, while the xDrive40i claims 198g/km. No prizes for guessing that the worst CO2 polluter is the M50i, emiting 248g/km.

Set to deliver years of dependable service

  • BMW has a good reputation for reliability
  • Uses proven engines and mechanics
  • Some electronics/software could be glitchy

BMW has a fine reputation for building cars that are dependable – especially when it comes to the mechanical components such as engines and gearboxes – so there shouldn’t be too much cause for concern as the X7 makes use of engines that are already found in several other BMW models.

Where you might find a little bit of trouble is with the company’s latest infotainment system. While it’s slick in operation with endless facilities, we’ve found in other models it can be a little unresponsive at times, with hit-and-miss voice control and connectivity issues in some cases. If this is a problem, some kind of software update should fix it as with any other car.

Ongoing running costs

Road tax (12 months) £475
Insurance group 50
How much is it to insure?