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2018 BMW X3 M40i

The 2018 BMW X3 M40i is a 355-hp 3.0-liter turbocharged inline-6 SUV with an 8-speed steptronic automatic and all-wheel drive. It starts at $54,500 MSRP and is rated at 23 mpg combined.

It makes 355 horsepower at 5,500 rpm and 369 lb-ft of torque at 1520-4800 rpm. EPA fuel-economy estimates are 20 mpg city and 27 mpg highway (23 mpg combined).

The X3 measures 186.1 inches long on a 112.8-inch wheelbase and has a curb weight of 4,277 lb.

Spec Value
Vehicle
Body TypeSUV
PowertrainGas
Price
MSRP$54,500
MSRP with Destination$55,495
Destination Charge$995
Engine
Engine TypeTurbocharged inline-6 (B58)
Displacement3 L
Horsepower355 hp @ 5,500 rpm
Torque369 lb-ft @ 1520-4800 rpm
ValvetrainDOHC 24V VALVETRONIC Double-VANOS
Bore and Stroke82.0 x 94.6
Compression Ratio11:1
Injection TypeHigh Precision Direct Injection
Drivetrain
Drive TypeAWD (xDrive)
Transmission
Transmission8-speed Steptronic automatic
1st Gear5.25
2nd Gear3.2
3rd Gear2.143
4th Gear1.72
5th Gear1.314
6th Gear1
7th Gear0.822
8th Gear0.64
Reverse3.456
Final Drive3.385
Fuel Economy
City20 MPG
Highway27 MPG
Combined23 MPG
Recommended FuelPremium unleaded (AKI 91 recommended; 89 min)
Tank Capacity17.2 gal
Suspension
Front SuspensionAluminum double-joint spring strut axle
Rear SuspensionFive-link axle in lightweight steel construction
Turning Diameter39.7 ft
Brakes
Front Brake CalipersFour-piston fixed
Tires & Wheels
Wheels Front7.5J x 19 LM
Wheels Rear7.5J x 19 LM
Tires Front245/50 R19
Tires Rear245/50 R19
Dimensions & Weight
Length186.1 in
Width74.7 in
Height66 in
Wheelbase112.8 in
Front Track63 in
Rear Track63.6 in
Ground Clearance8 in
Cargo Volume28.7 ft³
Curb Weight4,277 lbs
Weight Distribution (F/R)50.4% / 49.6%
Interior
Headroom Front41.1 in
Headroom Rear39.1 in
Legroom Front40.3 in
Legroom Rear36.4 in
Shoulder Room Front57.6 in
Shoulder Room Rear56 in

Safety & Recalls

NCAP safety ratings

Not crash-tested by NHTSA for this model year.

Recalls

11 recalls on file with NHTSA for the 2018 BMW X3. Not every recall applies to every trim or VIN — check yours at nhtsa.gov/recalls.

Oct 15, 2024 · STRUCTURE

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: 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.

NHTSA campaign 24V764000

Jul 17, 2024 · STRUCTURE

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: 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.

NHTSA campaign 24V534000

Jul 8, 2021 · AIR BAGS:FRONTAL

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: 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.

NHTSA campaign 21V521000

Mar 18, 2020 · ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

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: 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.

NHTSA campaign 20V152000

Sep 27, 2019 · BACK OVER PREVENTION: SENSING SYSTEM: CAMERA

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: 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.

NHTSA campaign 19V684000

Jul 31, 2019 · SEATS

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: 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.

NHTSA campaign 19V563000

Jul 6, 2018 · SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER

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: 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.

NHTSA campaign 18V453000

Jun 21, 2018 · EXTERIOR LIGHTING:TURN SIGNAL

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: 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.

NHTSA campaign 18V431000

Jun 6, 2018 · LANE DEPARTURE: LANE KEEP: STEERING ASSIST

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: 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.

NHTSA campaign 18V374000

Mar 7, 2018 · STRUCTURE:BODY

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: 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.

NHTSA campaign 18V154000

Nov 15, 2017 · ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

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: 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.

NHTSA campaign 17V719000

76 owner complaints to NHTSA for the 2018 BMW X3

Owner Complaints

76 owner complaints filed with NHTSA for the 2018 BMW X3 (4 mention a crash, 2 a fire, 1 an injury). See all on nhtsa.gov

Most-cited areas
Electrical System22
Engine16
Unknown Or Other12
Structure9
Steering7
Exterior Lighting6
A complaint can cite more than one area.
Most recent complaints
Oct 4, 2026 · Electrical System, Exterior Lighting
“I am reporting a serious safety-related failure involving my 2018 BMW X3. While I was driving on Highway [XXX] in [XXX] on XXX, the vehicle suddenly lost electrical power and became disabled while I…”
Sep 17, 2026 · Structure
“A rock hit the front of the moonroof glass and a minutes later the moonroof tempered glass exploded while driving.”
Sep 10, 2026 · Electrical System
“My car suddenly lost all power when at a red light in a turn lane on an active roadway. Fortunately, it was daytime because I could not turn on hazards or lights. I couldn't open the trunk and more…”
Aug 14, 2026 · Engine
“There were several radiatior hose leaks that happened in the winter due to the outdated plastic housing and lines that seized and cracked with colder temperatures. It has become extremely common…”
Apr 14, 2026 · Electrical System, Structure
“The sunroof drains of the vehicle become easily clogged. When this happens, water drains into the battery compartment and interior of the vehicle. Although BMW is aware of this, and the attendant…”

Complaints are unverified reports submitted to NHTSA by owners. They cover the whole model year, not a specific trim, and a count alone doesn't show how common a problem is.

Source: US National Highway Traffic Safety Administration (nhtsa.gov), matched as 2018 BMW X3. US-market vehicles only; data cached for up to 7 days.

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