Powertrain families
B48 petrol I4 · B58 petrol I6 · B47 diesel I4 · B57 diesel I6
X4 (G02) — Sports Activity Coupe
2018–2025
Editorially reviewedReviewed 2026-08-10; market and model-year scope is stated in the record sources.
- Internal code
- G02
- Production
- 2018–2025
- Body style
- 5-door SAC
- Platform
- X family · front- or all-wheel drive by derivative
Body variants
X4 → G02 → Sports Activity Coupe
X4 G02: history, design and engineering
How this generation came about, what made it different and how the selected sports activity coupe fits into the family.
G02 was the second X4, introduced in 2018 with a longer wheelbase, a lighter body structure and a clearer visual separation from G01 X3. Regular versions retained standard xDrive and eight-speed automatic transmission, but body, suspension tuning and cargo packaging remained G02-specific.
The range covered four- and six-cylinder petrol and diesel engines, M40i/M40d M Performance derivatives and, separately, the full X4 M F98. A 2021 update aligned G02 with the revised X3 through new lighting, bumpers, displays, assistance systems and 48-volt technology on selected engines.
Series production ended in 2025 without a like-for-like third-generation combustion X4 announced at that boundary. End dates vary between plant, market and dealer stock, so the catalog records 2025 as the generation boundary while leaving the exact last-car date tied to a factory source when available.
2018–2025generation lifecycle
1body branches
4engine/drive families
4range designations
G02factory code
X family · front- or all-wheel drive by derivativearchitecture
Sports Activity Coupe: dimensions and packaging
Dimensions can change with body, market and model year, so this page keeps them tied to the exact factory branch.
Length4,752 mm
Width1,918 mm
Height1,621 mm
Wheelbase2,864 mm
Luggage525–1,430 L
Fuel tank68 L
Seats5
Doors5-door SAC
| Body | Code | Production | Doors / seats | Length | Luggage |
|---|---|---|---|---|---|
| Sports Activity Coupe | G02 | 2018–2025 | 5-door SAC / 5 | 4,752 mm | 525–1,430 L |
Engines and powertrains
The generation could span very different engines and drivetrains. The table keeps output, gearbox, market and production period together.
Factory modification matrix
Documented sports activity coupe applications; output and availability remain market- and model-year-specific.
| Model | Years | Engine | Output | Transmission | Drive | Market | Source |
|---|---|---|---|---|---|---|---|
| X4 xDrive20i / xDrive30i | 2018–2025 | B48B20 turbo petrol inline-four | 184–252 PS | 8AT | AWD | Global range | The all-new BMW X4 |
| X4 M40i | 2018–2025 | B58B30 turbo petrol inline-six + later 48 V | 360–387 PS | 8AT | AWD | Global range | The all-new BMW X4 |
| X4 xDrive20d / xDrive30d | 2018–2025 | B47D20 / B57D30 diesel + later 48 V | 190–286 PS | 8AT | AWD | Europe | The all-new BMW X4 |
| X4 M40d | 2018–2025 | B57D30 twin-turbo diesel + later 48 V | 326–340 PS | 8AT | AWD | Europe | The all-new BMW X4 |
Factory designations
xDrive20i/30i · M40i · xDrive20d/30d · M40d
Petrol engines
Inline and V engines are grouped by engine family, displacement, induction system and emissions specification.
Diesel derivatives
Where diesels were offered, output, injection generation and emissions hardware are recorded market by market.
Electrification
Mild- and plug-in hybrids are separate derivatives; combustion-engine output must not be substituted for total system output.
How power reaches the road
Gearboxes, driven wheels and final-drive hardware changed with engine, market and production date.
Transmissions
Gearbox type and unit code follow engine, market and production date. Gear count alone does not identify the transmission.
Driven wheels
Catalog architecture: X family · front- or all-wheel drive by derivative. All-wheel-drive availability and hardware remain derivative-specific.
Final drive
Ratio, differential type and electronic control belong to the exact derivative and can differ on performance models.
What changed underneath
Suspension, brakes, safety systems and electronics evolved across the range, even when cars shared the same basic architecture.
Body-branch dimensions
- G02: 4,752 mm × 1,918 mm × 1,621 mm
Body & suspension
- Mounting points and geometry follow the body branch
- Springs and dampers follow axle load and chassis package
- Wheels and permitted loads follow the factory label
Brakes & steering
- Brake size follows engine and equipment
- Assistance type and steering ratio can change
- ABS/DSC generation follows model year
Passive safety
- Airbag count varies by market and year
- SRS parts are VIN-specific
- Structural repairs require factory procedures
Electronics
- Vehicle-bus generations changed during production
- Control-unit software levels must remain compatible
- Retrofits are recorded separately from factory equipment
How the generation evolved
The important launches, additions and updates did not always happen at the same time for every body or market.
Second X4 revealed
BMW presented a larger and lighter G02 with a more distinct SAC body.
Market launch
The regular xDrive range entered markets with petrol, diesel and M Performance branches.
Full X4 M
F98 joined as a separately engineered BMW M product.
Update and production end
A coordinated X3/X4 update carried G02 to the end of series production in 2025.
The versions that stood apart
Performance models, option packages and regional editions may look related, but their engineering and production identity can be very different.
Sports Activity Coupe
G02X4 G02 is a distinct G02 body branch. A coupe-roofed X model that trades some rear packaging for a lower, more sporting silhouette. Engines/drive: B48 petrol I4, B58 petrol I6, B47 diesel I4, B57 diesel I6.
Inside the car
Cabin technology and standard equipment changed by country and year; a build sheet remains the best guide to one individual car.
Cabin & comfort
- Trim and seats follow option codes
- Climate systems vary by market
- Audio and navigation changed by model year
Lighting & assistance
- Lamp technology and modules follow production date
- Driver assistance cannot be inferred from buttons alone
- Regional rules affect lighting and warnings
What to check today
A practical starting point for inspecting and maintaining a car from this generation — not a diagnosis of an individual example.
Identify first
- Match VIN on body and documents
- Obtain the factory option list
- Confirm market and production date
Inspect the structure
- Check repairs and corrosion
- Assess suspension, brakes and tyres
- Compare fitted parts with factory specification
Mechanical history
- Read faults with compatible diagnostics
- Verify engine and transmission maintenance
- Separate invoices from unsupported verbal history
| Item | Interval / trigger | Catalog note |
|---|---|---|
| Engine oil & filter | CBS/factory schedule; time and mileage for historic cars | Oil approval follows the exact engine and market. |
| Brake fluid | Time-based factory schedule | ABS/DSC-compatible bleeding procedure is required after hydraulic work. |
| Coolant | Factory schedule and condition | Fluid specification and bleeding method are generation-specific. |
| Transmission & final drives | Unit type and operating conditions | Use the exact approved fluid; no one interval fits every derivative. |
How to identify the exact car
The badge and registration year tell only part of the story; production date, body code, engine and factory options complete it.
- Factory body codes
- G02 — Sports Activity Coupe
- Range designations
- xDrive20i/30i, M40i, xDrive20d/30d, M40d
- Powertrain families
- B48 petrol I4, B58 petrol I6, B47 diesel I4, B57 diesel I6
- VIN
- Identifies model, plant and production branch and keys the parts catalog and factory equipment record.
- Production date
- More useful than first-registration year when choosing parts and locating technical revisions.
- Type code
- Refines engine, body, market and transmission combination.
- Option codes
- Confirm factory equipment; later retrofits are recorded separately.
- Unit number
- Supports engine or gearbox originality checks and component applicability.
Where the information comes from
The story is mapped through English Wikipedia and its bibliography, then important dates and technical claims are checked against BMW material.
- 01BMW X4 (G02)Wikipedia contributors
Secondary production, model, update and end-of-cycle overview.
- 02The all-new BMW X4 is comingBMW Group PressClub
Factory G02 launch, dimensions, drivetrain and production documentation.
Notes and limitations
- Research revision dated 2026-08-10: English Wikipedia was used as a subject and bibliography map; key claims were checked against the listed primary BMW Group material.
- The exact 2025 last-production date remains a secondary boundary until a direct plant record is located.
- G02 M40 derivatives and F98 X4 M require separate chassis and engine rows.
- Tree years describe the worldwide generation lifecycle; individual market dates may be narrower.
- Exact dimensions, power, weight and emissions belong at body, engine, market and model-year level.
- Known-issue guidance is editorial context and never replaces inspection of the individual vehicle.
2 primary references · market differences documentedPhotography: Dinkun Chen, CC BY-SA 4.0 · Wikimedia Commons. Rights checked 2026-08-06; wikimedia commons 1,800 px derivative downloaded; local 640 px and 1,280 px avif versions created without cropping.Updated 6 August 2026