Parkers overall rating: 4.3 out of 5 4.3

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

Petrol engines 3.8 - 5.7 mpp
Diesel engines 5.6 - 7.3 mpp
Plug-in hybrid petrol engines 18.1 - 22.9 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.
Based on "Weighted" mpg; figures depend on the proportion of miles driven in pure electric mode and may vary widely

Fuel economy

Petrol engines 24.4 - 37.2 mpg
Diesel engines 37.2 - 48.7 mpg
Plug-in hybrid petrol engines 117.7 - 148.7 mpg
  • Cheaper small capacity petrol and diesel
  • Plug-in hybrid could be the best for you
  • Relatively frugal performance diesel model

The cheapest mainstream BMW X3 to run looks likely to be the diesel xDrive20d version for the majority of buyers. Its fuel economy is a claimed 44.8-47.9mpg

If you’re not doing a huge amount of miles per year or don’t fancy the idea of a diesel X3 in the current climate, there's also the petrol xDrive20i. This version offers claimed fuel economy of 34.4-36.7mpg.

The xDrive30d still offers impressive fuel economy for the performance, at a claimed 42.8-45.6mpg, while the M40i returns up to 30.1-31.4mpg. 

On all models, the size of the alloy wheels can have an impact on claimed fuel economy figures and CO2 emissions. Check the specs when you buy in case it nudges the car into a different tax bracket. 

What about hybrid or pure electric X3s?

A plug-in hybrid, badged xDrive30e, has a claimed CO2 output of 46-49g/km and mpg figures ranging from 134.5-148.7mpg. The electric range for the battery is 34 miles.

BMW X3 xDrive30e socket

An all-electric X3 - badged iX3 - will join the range, providing a premium SUV with zero-emission running. Great if you use it around town and can charge at home but would you want a car this size for those environments?

The X3's CO2 emissions are par for the course for this type of car. The best performer is the xDrive20d, emitting 140-146g/km, while the more powerful xDrive30d produces 154-160g/km. 

If you prefer petrol power, expect higher CO2 emissions of between 176-187g/km for the xDrive20i, while the higher performance M40i emits between 204-215g/km. 

Pick the X3 M and you'll find 26.9mpg is the target, with 239g/km of CO2. That's a lot, but given the performance available, it's not outrageous.


  • No recalls for the previous car
  • Several for this version already
  • Make sure the work has been done

While there weren't any recalls for the previous-generation X3, the new one has already been the subject of seven since 2018.

These issues relate to the rear brake caliper, two for the rear spoiler attachment, fuel supply, the steering spindle and the driver and passenger airbag. This will have all been rectified by BMW under warranty, so there shouldn't be too much to worry about, but check in the history that these have all been carried out when buying used.

BMW X3 rear badge

Ongoing running costs

Road tax (12 months) £480 - £490
Insurance group 28 - 50
How much is it to insure?