BMW X3 2021 MPG: Fuel Efficiency Ranked by Trim and Driving Conditions
The 2021 BMW X3 stands out in the luxury SUV market, blending powerful performance with impressive fuel economy—especially when considering its varied mpg figures across trims and driving conditions.
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Overall Fuel Economy of the 2021 BMW X3
The 2021 BMW X3 delivers competitive mpg across its range, with most models averaging between 22 to 30 mpg depending on engine and transmission. The turbocharged inline-6 and hybrid variants offer enhanced efficiency, particularly in city driving and combined city/highway cycles (EPA-estimated), making it a smart choice for eco-conscious drivers seeking premium SUV capability.
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MPG by Trim and Engine Configuration
The base 2.0-liter turbocharged inline-6 in the 2021 X3 achieves approximately 21 mpg in combined city/highway driving. The 3.0-liter inline-6 in the X3 335i reaches up to 20 mpg in mixed conditions, while plug-in hybrid variants exceed 40 mpg in electric mode, significantly reducing emissions and fuel costs for daily commuters.
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Real-World Driving Impact on MPG
Real-world mpg varies based on driving habits, terrain, and load. Urban drivers benefit most from the X3’s responsive efficiency, while highway cruising benefits from aerodynamic design and optimized transmission shifts. Regular maintenance and eco-driving techniques can improve fuel economy by up to 5%, maximizing the value of the 2021 X3’s fuel efficiency.
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With strong mpg performance across its trims, the 2021 BMW X3 balances luxury, power, and efficiency—ideal for those who demand both refinement and fuel economy. Compare models today and experience the perfect blend of performance and sustainability in one of the most popular luxury SUVs of its era.
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Search by Model. Search by make for fuel efficient new and used cars and trucks. BMW sedans have lost some of the dual-personality demeanor that made them both fun to drive and luxurious, but the 2021 X3 recaptures a bit of that magic.
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2021 BMW X3 MPG Based on data from 97 vehicles, 5,566 fuel-ups and 1,668,446 miles of driving, the 2021 BMW X3 gets a combined Avg MPG of 23.36 with a 0.16 MPG margin of error. View detailed gas mileage data for the 2021 BMW X3. Use our handy tool to get estimated annual fuel costs based on your driving habits.
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Get official 2021 BMW X3 xDrive30e MPG ratings. View detailed city, highway, and combined fuel efficiency data and compare with similar vehicles. BMW X3 review - MPG, running costs & CO2 emissions "Every engine gets mild or plug-in hybrid tech, and efficiency is strong.
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The PHEV now has a far greater EV-only range". Fuel Economy of the 2021 BMW X3 xDrive30e. Compare the gas mileage and greenhouse gas emissions of the 2021 BMW X3 xDrive30e side.
A 2021 BMW X3 xDrive30i gets up to 23 miles per gallon in the city, and 29 miles per gallon on the highway. The combined average MPG for the 2021 BMW X3 xDrive30i is 25 miles per gallon. The most accurate BMW X3 MPG estimates based on real world results of 29.5 million miles driven in 1,393 BMW X3s.
View detailed gas mileage data for the 2021 BMW X3 M. Use our handy tool to get estimated annual fuel costs based on your driving habits.