Showing the 2018 X6 X6 M. NHTSA's VIN data shows it with a 4.4 L engine, but that may not be every version of it, so the numbers below cover every version of this model year. Every version
Owner complaints, recalls, fuel economy and safety ratings from public NHTSA and EPA data, updated Oct 17, 2026.
Fuel economy
16–21 mpgcombined; city 14–18, highway 19–25; every version of this model year
Five years of fuel
$19,160–$25,150U.S. average; Ohio $18,060–$23,700 at local prices; every version of this model year; fuel only, not other costs of owning it; 15,000 miles a year, at EIA fuel prices for the week of Oct 12, 2026
NHTSA overall safety rating
Not ratedNHTSA has no overall rating for this year
NHTSA's VIN data lists these trims for the 2018 X6. A trim's engine and numbers are shown as its own only where EPA names versions after the trim and no other version could be it; "seen with" means a source shows that engine on the trim, not that it was the only one. Recalls and complaints cover the whole model year: whether a recall applies to a car depends on its VIN, on NHTSA's recall lookup.
Owners have filed 4 complaints with NHTSA about the 2018 X6. These are unverified owner reports, counted by the part of the car they name; one complaint can name several parts. Counts aren't adjusted for how many were sold, so they don't show how reliable a car is.
Complaints by part of the car
Part
Complaints
Crashes
Fires
Injuries
Power train
1
0
0
0
Service brakes
1
0
0
0
Steering
1
0
0
0
Suspension
1
0
0
0
Tires
1
0
1
0
Unknown or other
1
0
0
0
Complaints by model year
Newer years have had less time to collect complaints, and counts aren't adjusted for sales, so a shorter bar doesn't mean a more reliable year.
NHTSA lists 4 recall campaigns for the 2018 X6 over its history. Campaigns are matched by model and year, so each one may apply to a given car, and its repair may already be done: check a VIN on NHTSA's recall lookup for the open recalls on that exact car.
BMW of North America, LLC. (BMW) is recalling certain 2015-2019 X6 sDrive35i, X6 xDrive35i, X6 xDrive50i, and X6M vehicles equipped with rear seat lower anchor bars used in securing child restraint seats. The lower anchor bars may become damaged over time when used with an ISOFIX-type, rigid-style connector, child restraint system.
Risk: Damaged lower anchor bars may increase the child's risk of injury in the event of a crash.
Remedy: BMW will notify owners, and dealers will weld a reinforcing bracket to the lower anchor bars and the vehicle body, free of charge. Owner notification began January 17, 2020. Owners may contact BMW customer service at 1-800-525-7417.
BMW of North America, LLC (BMW) is recalling certain 2018-2019 BMW X6 sDrive35i, X6 xDrive35i, X6 xDrive50i, and X6M vehicles. The wheel bolts on these vehicles may not have been properly tightened.
Risk: The improperly tightened wheel bolts may loosen and break, affecting vehicle handling and control and increasing the risk of a crash.
Remedy: BMW will notify owners, and dealers will replace and tighten all of the wheel bolts, free of charge. The recall began November 1, 2018. Owners may contact BMW customer service at 1-800-525-7417.
BMW of North America, LLC (BMW) is recalling certain 2018 BMW X5 xDrive35i, X5 xDrive50i, X5 xDrive35d, and X6 sDrive35i vehicles. The pivot bolt on the front lower-left control arm may not have been properly hardened, which may cause the control arm to break.
Risk: If the lower control arm breaks, vehicle handling and control can be affected, increasing the risk of a crash.
Remedy: BMW will notify owners, and dealers will inspect the lower-left control arms and replace if necessary, free of charge. The recall began July 11, 2018. Owners may contact BMW customer service at 1-800-525-7417.
BMW of North America, LLC (BMW) is recalling certain 2018 BMW X5 SAV, X5 M SAV, X6 SAV, and X6 M SAV vehicles. Bolts that secure the front suspension may not have been properly tightened.
Risk: Loose bolts can affect the performance of the suspension, thereby increasing the risk of a crash.
Remedy: BMW will notify owners, and dealers will inspect and tighten the wishbone suspension bolts, free of charge. The recall is expected to begin January 8, 2018. Owners may contact BMW customer service at 1-800-525-7417.
Carmakers sent NHTSA 119 service bulletins and notices that cover the 2018 X6, the latest on Jan 21, 2026. They tell dealers how to fix known issues.
The parts they mention most: equipment (45), electrical system (34), service brakes (9), engine and engine cooling (8), suspension (7).
NHTSA defect investigations
Opening an investigation isn't a finding of a defect. Outcomes are as NHTSA's summary states them. A recall is shown as an investigation's outcome only where NHTSA's summary names it; other recalls NHTSA's file lists with it are marked as listed, not caused.
Investigation
Part
Opened
Status
Engineering analysis EA21002 Desiccated Air Bag Inflator Rupture · covers 37 makes
The owner's manual gives the oil and how often to change it. We show oil facts only once we've checked them against the manual, and we haven't yet for the 2018 X6.
EPA class: standard sport utility vehicle. EPA greenhouse gas score: 2–4 out of 10. Each version EPA tested:
Swipe the table sideways for more columns.
Version
Engine
Transmission
Fuel
City / hwy / comb
X6 M All-Wheel Drive
4.4 L, 8 cyl, turbo
Automatic (S8)
Premium Gasoline
14 / 19 / 16
X6 sDrive35i Rear-Wheel Drive
3.0 L, 6 cyl, turbo
Automatic (S8)
Premium Gasoline
18 / 25 / 21
X6 xDrive35i All-Wheel Drive
3.0 L, 6 cyl, turbo
Automatic (S8)
Premium Gasoline
18 / 24 / 20
X6 xDrive50i All-Wheel Drive
4.4 L, 8 cyl, turbo
Automatic (S8)
Premium Gasoline
15 / 21 / 17
Sources and dates
U.S. EPA fuel economy data, file of Sep 29, 2026
NHTSA owner complaints, file of Oct 17, 2026
NHTSA recalls, file of Oct 17, 2026
NHTSA manufacturer communications, file of Oct 17, 2026
NHTSA defect investigations, file of Oct 17, 2026
NHTSA 5-Star Safety Ratings, file of Aug 7, 2026
U.S. Energy Information Administration, file of Oct 12, 2026
Fuel cost: EPA mpg with fuel prices for the week of Oct 12, 2026 and electricity prices for Jul 2026. Source: U.S. Energy Information Administration (Oct 2026). Complaints are unverified reports owners filed with NHTSA. About the data