2018 BMW X3 M40i
Fuel Economy Overview
The 2018 BMW X3 M40i achieves an EPA-estimated 23 MPG in combined city and highway driving, with 20 MPG in the city and 27 MPG on the highway. Powered by a 3L 6-cylinder turbocharged engine paired with a automatic (s8), this small sport utility vehicle 4wd features All-Wheel Drive drive.
In terms of environmental impact, the 2018 X3 M40i produces approximately 388 grams of CO2 per mile. This figure is measured under standardized EPA test conditions and represents tailpipe emissions only. For context, the average new vehicle sold in the United States produces approximately 400 grams of CO2 per mile, meaning this X3 M40i performs better than the national average in this regard.
The estimated annual fuel cost for this vehicle is $3,000, based on 15,000 miles of driving per year and current national average fuel prices. Compared to the average new vehicle, you would save $4,250 over a 5-year period. This calculation accounts for differences in fuel consumption efficiency and provides a practical measure of long-term ownership costs attributable to fuel economy.
Energy DNA
Green Scorecard
Personalized Commute CalculatorEPA defaults to 55% City / 45% Hwy
Adjust the slider to match your daily driving habits. City driving involves stop-and-go traffic under 45mph, while highway driving represents sustained speeds over 55mph.
The Brick Effect: Highway Speed Penalty
EPA highway tests average roughly 48 mph. Driving at 75 mph increases aerodynamic drag exponentially. Because the Small Sport Utility Vehicle 4WD has a large frontal area, expect your real-world highway fuel economy to drop by up to 25% at high speeds.
5-Year Total Cost of Ownership
Recall Intelligence
BMW of North America, LLC (BMW) is recalling certain 2018-2023 X3 sDrive30i, X3 xDrive30i, X3 M40i, and X3 M vehicles. The attachment for the interior cargo rail may become damaged in a rear crash and result in the cargo rail detaching.
Consequence & Remedy
Consequence: Interior cargo rail detachment during a rear crash can increase the risk of injury.
Remedy: Dealers will replace the rear cargo rail attachment bolts, free of charge. Owner notification letters were mailed January 2, 2024. Owners may contact BMW customer service at 1-800-525-7417.
BMW of North America, LLC (BMW) is recalling certain 2018-2022 X3 sDrive30i, X3 xDrive30i, X3 M40i, and X3 M vehicles. The attachment for the rear cargo rail may become damaged in a rear crash and result in the cargo rail detaching.
Consequence & Remedy
Consequence: Interior rear cargo rail detachment during a crash can increase the risk of injury.
Remedy: Dealers will replace the rear cargo rail attachment bolts, free of charge. Owner notification letters were mailed December 12, 2024. Owners may contact BMW customer service at 1-800-525-7417. Vehicles in this recall were previously remedied for this issue under recall number 24V-534 and will need to have the new repair completed.
BMW of North America, LLC (BMW) is recalling certain 2018-2019 X3 sDrive30i, X3 xDrive30i, X3 M40i and 2019 X4 xDrive30i, and X4 M40i vehicles. The front passenger seat occupant classification system may have been improperly assembled, which could result in the misclassification of the seat as unoccupied, and deactivate the front air bag.
Consequence & Remedy
Consequence: A deactivated front air bag will not deploy in the event of a crash, increasing the risk of injury.
Remedy: Dealers will replace the seat foam, which includes the occupant classification system, free of charge. Owner notification letters were mailed on September 3, 2021. Owners may contact BMW customer service at 1-800-525-7417.
BMW of North America, LLC (BMW) is recalling certain 2019-2020 X4 xDrive30i and X4 M40i, and 2018-2020 X3 sDrive30i, X3 xDrive30i, X3 M40i, and X3M vehicles. The instrument panel casing may not have been tightened properly to the passenger air bag.
Consequence & Remedy
Consequence: In the event of a crash necessitating air bag deployment, the air bag could damage the instrument panel and cause small pieces of the panel to strike the driver or other occupants, increasing the risk of injury.
Remedy: BMW will notify owners, and dealers will replace the instrument panel casing, free of charge. The recall began May 15, 2020. Owners may contact BMW customer service at 1-800-525-7417.
BMW of North America, LLC (BMW) is recalling certain 2018 540d, 2018-2020 530i, 530i xDrive, 540i, 540i xDrive, M550i xDrive, M5, 530e, 530e xDrive, X3 sDrive, X3 xDrive, X3 M40i, X3 M, and 2019-2020 X4 xDrive, X4 M40i, X4 M, X7 xDrive, X7 M50i, 740Li, 740Li xDrive, 750Li, 750Li xDrive, 8 Series Convertible and Coupe 840i, 840i xDrive, M850i xDrive, X5 sDrive, X5 xDrive, X5 M50i, X6 xDrive, X6 M50i, 330i, 330i xDrive, M340i, M340i xDrive, Z4 sDrive, Z4 M40i, 740Le xDrive and 745Le xDrive, 2018-2019 640i xDrive Gran Turismo and Rolls-Royce Phantom, 2019 M850i xDrive Gran Coupe and Rolls-Royce Cullinan and 2020 Toyota Supra vehicles. The back-up camera and display settings can be adjusted such that the rear view image is no longer visible and the system will retain that setting the next time the vehicle is placed in reverse. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 111, "Rearview Mirrors."
Consequence & Remedy
Consequence: The lack of an image in the back-up camera display increases the risk of a crash.
Remedy: BMW will notify owners, and dealers will update the back-up camera software, free of charge. The recall began November 8, 2019. Owners may contact BMW customer service at 1-800-525-7417 or Rolls-Royce at 1-877-877-3735. Toyota owners may contact Toyota customer service at 1-888-270-9371.
BMW of North America, LLC (BMW) is recalling certain 2018-2019 X3 sDrive30i, xDrive30i and M40i and 2019 X4 xDrive30i and M40i vehicles. The front seatback frames may have been improperly welded, allowing the seatback to unexpectedly fold forward or rearward.
Consequence & Remedy
Consequence: In the event of a crash, there is an increased risk of injury if the seatback folds forward or rearward.
Remedy: BMW will notify owners, and dealers will replace the front seats, free of charge. The recall began September 27, 2019. Owners may contact BMW customer service 1-800-525-7417.
BMW of North America, LLC (BMW) is recalling certain 2018-2019 BMW X3 sDrive30i, X3 xDrive30i, X3 M40i and certain 2019 X4 xDrive30i and X4 M40i vehicles. The rear brake caliper pistons on these vehicles may have an insufficient coating, potentially reducing rear brake performance.
Consequence & Remedy
Consequence: A reduction of braking performance can increase the risk of a crash.
Remedy: BMW will notify owners, and dealers will bleed the rear brake circuit, free of charge. The recall began August 31, 2018. Owners may contact BMW customer service at 1-800-525-7417.
BMW of North America, LLC (BMW) is recalling certain 2018 BMW X3 xDrive30i and X3 M40i vehicles. The rear turn signals on the outboard side panel will illuminate red, while the inboard turn signals simultaneously illuminate amber. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 108, "Lamps, Reflective Devices, and Associated Equipment."
Consequence & Remedy
Consequence: Turn signals that flash multiple colors may confuse other drivers, increasing the risk of a crash.
Remedy: BMW will notify owners, and dealers will inspect the rear turn signal lights, and replace if necessary, free of charge. The recall began August 20, 2018. Owners may contact BMW customer service at 1-800-525-7417.
BMW of North America, LLC (BMW) is recalling certain 2018-2019 BMW X3 xDrive30i, X3 sDrive30i, and X3 M40i vehicles equipped with the "Active Lane Keeping Assistant" option. The steering wheel may be incompatible with the lane keeping assistant function and may not detect if the driver's hands are off the wheel.
Consequence & Remedy
Consequence: If the sensors do not properly detect the driver's hands are off the wheel, the driver may not be alerted by one or more warning signals, increasing the risk of a crash.
Remedy: BMW will notify owners, and dealers will inspect the steering wheel, replacing it if necessary, free of charge. The recall began on July 19, 2018. Owners may contact BMW customer service at 1-800-525-7417.
BMW of North America, LLC (BMW) is recalling certain 2018 BMW X3 xDrive30i and X3 M40i vehicles. The rear spoiler may not have been properly attached during assembly, or may be missing screws, possibly causing the spoiler to detach while driving.
Consequence & Remedy
Consequence: If the spoiler detaches while driving, it can become a road hazard, increasing the risk of a crash.
Remedy: BMW will notify owners, and dealers will inspect the spoiler, correcting its attachment as necessary, free of charge. The recall is expected to begin May 1, 2018. Owners may contact BMW customer service at 1-800-525-7417.
BMW of North America, LLC (BMW) is recalling certain 2018 230i, 230i xDrive, M240i, M240i xDrive, M2, and X3 xDrive 30i SAV vehicles. These vehicles may have an error in the software for the instrument panel, causing the display to not properly illuminate. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 101, "Control and Displays."
Consequence & Remedy
Consequence: If the display does not illuminate during start up or does not illuminate various control and warning symbols while driving, it can increase the risk of a crash.
Remedy: BMW will notify owners, and dealers will update the instrument cluster display software, free of charge. The recall is expected to begin January 8, 2018. Owners may contact BMW customer service at 1-800-525-7417.
Loading live complaint data...
Looking for comprehensive historical data?
NHTSA FARS (Fatal Crash History) and broader generational safety trends are aggregated at the model level rather than by specific engine configurations. View the complete historical data profile for all BMW X3 M40i configurations.
Similar 2018 Small Sport Utility Vehicle 4WD Alternatives
2018 BMW X4 xDrive28i
2L 4-cyl All-Wheel Drive
2018 Ford Edge AWD
2L 4-cyl All-Wheel Drive
2018 Ford Escape AWD
2L 4-cyl All-Wheel Drive
2018 GMC Terrain AWD
2L 4-cyl All-Wheel Drive
2018 Hyundai Tucson AWD
2L 4-cyl All-Wheel Drive
2018 Jaguar E-Pace (296 Hp)
2L 4-cyl All-Wheel Drive
Fuel Cost Analysis
Based on 15,000 miles/year and current fuel prices.
Efficiency Breakdown
Estimated Lifetime Carbon Footprint
(Based on 200,000 miles driven)