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View all BMW X3 reviews
Parkers overall rating: 4.5 out of 5 4.5

The cheapest BMW X3 to run looks likely to be the diesel xDrive20d version for the majority of buyers. Its fuel economy is a claimed 53.3mpg, while CO2 output of 140g/km keeps VED car tax manageable. 

There doesn't seem to be a model particularly well-suited to company car drivers, however. Some user-choosers may be tempted, but with CO2 output that high we'd caution that benefit-in-kind liability is going to be very costly and it sadly doesn’t dip under the 130g/km write-down allowance threshold that many fleet managers use to decide which cars to offer on their lists. 

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 39.8mpg and CO2 output of 163g/km.

The xDrive30d still offers impressive fuel economy for the performance, at a claimed 48.7mpg, while the M40i returns up to 34.4mpg. 

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?

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. 

Green credentials

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 163-166g/km for the xDrive20i, while the higher performance M40i emits between 188-193g/km. 


While there weren't any recalls for the previous-generation X3, the new one has already been the subject of four in its short life cycle.

These issues will have all been rectified by BMW under warranty, so there shouldn't be too much to worry about. 

Estimated fuel cost per year

Fuel type Pence per litre Estimated cost per year *
Unleaded 128p £1,492 - £1,877 *
Diesel 131p £1,124 - £1,353 *

* The estimated fuel cost figure is based on an annual mileage of 10,000 miles and is a guide to how much this model will cost in fuel each year. It's calculated using the model's average MPG (calculated from both town centre and motorway driving) and the average fuel price from around the country. Actual fuel costs will vary based on driving style and road conditions.

Highest and lowest CO2 emissions

Engine CO2 emissions Road tax (12 months)
2.0d Diesel 133 g/km (Min) £465
3.0i Petrol 239 g/km (Max) £465

Ongoing running costs

Road tax (12 months) £145 - £465
Insurance group 28 - 45
How much is it to insure?

Vehicle excise duty (VED) varies according to the CO2 emissions and the fuel type of the vehicle. For cars registered before 01 March 2001 it is based on engine size. For cars registered on or after 01 March 2001 the VED or road tax is based on the car's CO2 emissions.