2018 BMW X6 — Full Specifications
As an Amazon Associate and CJ Affiliate and AWIN publisher we earn from qualifying purchases. Links below are affiliate links.
Running gear matters most — before anything else, UK: check tyre prices at TirendoUS: check wheel & tyre prices at WheelHero for this car's fitment.
The 2018 BMW X6 is an SUV offered with 2 engines (3L 6-cyl turbo, 4.4L 8-cyl turbo). Its most fuel-efficient configuration returns around 25 mpg (UK) / 21 mpg (US EPA) combined, with 19–25 mpg (UK) across all configurations. Owners often keep a BMW X6 workshop manual to hand for servicing and repairs.
Compared with the 2017 BMW X6: Fuel economy is essentially unchanged at around 25 mpg (UK) combined. The engine line-up listed by EPA is unchanged.
Full Specifications
| Engine (most efficient) | 3L 6-cyl turbo |
|---|---|
| Engine options | 3L 6-cyl turbo · 4.4L 8-cyl turbo |
| Transmission (most efficient) | Automatic (S8) |
| Fuel Type | Premium Gasoline |
| Powertrain | Conventional |
| Drive | Rear-Wheel Drive |
| Body Style | SUV |
| Fuel Economy (UK) | 25 combined / 22 urban / 30 extra-urban mpg |
| Fuel Economy (US EPA) | 21 combined / 18 city / 25 highway mpg |
| CO₂ Emissions | 265 g/km |
| EPA Greenhouse Gas Score | 4 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $3,900 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 3 configurations for the 2018 BMW X6 across 2 engines (3L 6-cyl turbo, 4.4L 8-cyl turbo). Combined fuel economy ranges from 16 to 21 mpg (US), or 19 to 25 mpg (UK), depending on engine, transmission and drive. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 3L 6-cyl turbo | Automatic (S8) | All-Wheel Drive | 24 | 20 (18/24) | 270 | $4,100 |
| 3L 6-cyl turbo | Automatic (S8) | Rear-Wheel Drive | 25 | 21 (18/25) | 265 | $3,900 |
| 4.4L 8-cyl turbo | Automatic (S8) | All-Wheel Drive | 19 | 16 (14/19) | 341 | $5,150 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
Owner Essentials for the 2018 BMW X6
Running Costs: 2018 BMW X6
Covering around 8,000 miles a year in a 2018 BMW X6 at 25 mpg combined, expect roughly 1,455 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $3,900 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Planning a road trip? Grab a road trip packing list. Only need this car occasionally? See our buy vs rent comparison.
2018 BMW X6 Safety Ratings (NHTSA)
No NHTSA crash-test rating is on record for this model year. The NHTSA rates only a subset of vehicles each year; you can browse every rated vehicle on our NHTSA Safety Ratings hub.
Recalls & Owner Complaints (NHTSA)
NHTSA lists 4 safety recall campaigns that include the 2018 BMW X6 (as of 6 October 2026). Most affected areas: Suspension (2), Child seat (1), Wheels (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
- Child seat — campaign 19V823000, reported 18 November 2019. Risk: Damaged lower anchor bars may increase the child's risk of injury in the event of a crash.
- Wheels — campaign 18V614000, reported 12 September 2018. Risk: The improperly tightened wheel bolts may loosen and break, affecting vehicle handling and control and increasing the risk of a crash.
- Suspension — campaign 18V439000, reported 28 June 2018. Risk: If the lower control arm breaks, vehicle handling and control can be affected, increasing the risk of a crash.
- Suspension — campaign 17V727000, reported 17 November 2017. Risk: Loose bolts can affect the performance of the suspension, thereby increasing the risk of a crash.
Owners have filed 4 complaints with NHTSA about the 2018 BMW X6. The most-reported areas are Power train (1), Tires (1), Unspecified (1). Complaints include 1 reported fire.
Used-buyer checklist for the 2018 BMW X6
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Suspension (2 recall campaigns) — Listen for knocks over bumps and check tyre wear for signs of alignment problems.
- Wheels (1 recall campaign) — Look for bent or cracked wheels and ask about any wheel recalls.
- Transmission & drivetrain (1 owner complaint) — On the test drive, watch for hesitation, jerking or slipping between gears and ask for transmission service history.
- Tyres (1 owner complaint) — Check tyre age and wear and ask about any tyre recalls.
Source: US NHTSA recall and consumer-complaint databases, retrieved 6 October 2026. Complaints are unverified owner reports, not confirmed defects. Check any vehicle by VIN at nhtsa.gov/recalls, and see our guide to checking a used car for recalls.
How It Compares
How does the BMW X6 compare to similar SUVs? For context, SUVs in our database average around 27 mpg (UK) combined — this model's 25 mpg figure is 2 mpg below that average. Its 265 g/km CO₂ figure is 12 g/km higher than the 253 g/km average for SUVs on this site. This comparison is based on 1824 SUVs in our dataset.
BMW models in our database average about 28 mpg (UK) combined on their most efficient configuration; the 2018 BMW X6's 25 mpg is 3 mpg below that make average. Its 265 g/km CO₂ figure is 25 g/km higher than the 240 g/km BMW average.
Of the 17 BMW X6 model years we cover, the 2018 ranks 6th for combined fuel economy on its best configuration (25 mpg UK combined, against a high of 29 mpg). See every BMW X6 year side by side.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
Recommended Accessories for the 2018 BMW X6
Frequently Asked Questions
What engine does the 2018 BMW X6 have?
EPA lists 2 engines for the 2018 BMW X6: 3L 6-cyl turbo, 4.4L 8-cyl turbo. The most fuel-efficient configuration pairs the 3L 6-cyl turbo with a automatic (s8).
What is the fuel economy of the 2018 BMW X6?
The most efficient configuration returns around 25 mpg (UK) combined, or 21 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 19 to 25 mpg.
How much does the 2018 BMW X6 cost to fuel per year?
The US EPA estimates about $3,900 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
Does the 2018 BMW X6 have any recalls?
NHTSA lists 4 safety recall campaigns that include the 2018 BMW X6 (as of 6 October 2026). Most affected areas: Suspension (2), Child seat (1), Wheels (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
What are the most common problems reported for the 2018 BMW X6?
Among the 4 owner complaints filed with NHTSA, the most-reported areas are Power train (1 complaint), Tires (1 complaint), Unspecified (1 complaint). Complaints are unverified owner reports, not confirmed defects, and raw counts rise with how many cars were sold.
Is the BMW X6's fuel economy good for an SUV?
It returns around 25 mpg (UK) combined, against a same-body-style average of roughly 27 mpg among the SUVs we track.