All models
X4 SERIES / G02 · 2022

X4 M40i

B58 family, 3.0L turbo inline-six, 48V mild hybrid

BMW X4 M40i · Exterior
G02 M40i generation reference; photographed year and market may differ from the 2022 US factory facts. 1 / 2
Power387PS382 hp
Torque500Nm369 lb-ft
0–100 km/h4.9s
Top speed250km/hElectronically limited
Weight1,895kg

2022 (US) · Factory source

Specifications

Every figure, in one place.

Compare with others

Performance

Power
387 PS · 382 hp · 285 kW
Torque
500 Nm
0–100 km/h
4.9 s
Top speed
250 km/h · limited
Power-to-weight
4.90 kg/PS

Engine and drivetrain

Engine
B58 · Inline-six
Displacement
2,998 cm³
Induction
Twin-scroll turbo
Redline
6,500 rpm
Gearbox
8-speed automatic
Drivetrain
xDrive all-wheel drive
Powertrain
Petrol

Body and dimensions

Production
2018–present
Body
SUVs
Length
4,752 mm
Width
1,918 mm
Height
1,621 mm
Wheelbase
2,864 mm
Kerb weight
1,895 kg
Fuel tank
65 L
Motron scores

Where this car ranks across all 93 cars in the catalogue.

Acceleration52
Power55
Power-to-weight48
Top speed28

Why you’d want one

  • A six-cylinder SUV with a distinctive profile.

Know before you buy

  • Robust engine; check for coolant leaks at the expansion tank
  • Oil filter housing gasket seepage with age
  • Keep software and transmission adaptations current

Commonly reported ownership points, not a guarantee of faults. Always get an independent inspection.

The story

An X model with a lower roof.

The X4 M40i combines a turbocharged B58 straight-six with a coupé-like SUV roofline. It is an M Performance model, separate from the full X4 M Competition.

Best for

A six-cylinder SUV with a distinctive profile.

Trade-off

Try rear headroom and luggage access before choosing the roofline.

M40i and X4 M Competition are different models with different engine families.

Under the bonnet

B58 · Inline-six

B58 family, 3.0L turbo inline-six, 48V mild hybrid. 48V mild hybrid.

Engine profile
B58 engine

B58 straight-six engine-family reference. Covers, revisions and vehicle installations differ.

B58 / factory powertrain

B58 family, 3.0L turbo inline-six, 48V mild hybrid. Longitudinal engine layout and all-wheel drive.

Factory profile

The full specification.

Ownership and buying
Buying tips
Try rear headroom and luggage access before choosing the roofline.
Maintenance notes
Match the engine code and VIN to the correct BMW service schedule. Ask for dated maintenance records and an independent inspection before buying.
Keep exploring

Related cars

G06 2020

X6 xDrive40i

B58 · Inline-six · 2019–present

0–100 5.5 s250 km/h

340 PS
G07 2019

X7 xDrive40i

B58 · Inline-six · 2019–present

0–100 6.1 s245 km/h

340 PS
G09 2023

XM

S68 + eDrive · V8 + electric motor · 2022–present

0–100 4.3 s250 km/h

653 PS
Photo credits