Powertrain families
B48 petrol mild hybrid · B58 petrol mild hybrid · B47 diesel mild hybrid · plug-in hybrid
X3 (G45) — Sports Activity Vehicle
2024–present
Editorially reviewedReviewed 2026-08-10; market and model-year scope is stated in the record sources.
- Internal code
- G45
- Production
- 2024–present
- Body style
- 5-door SAV
- Platform
- X family · front- or all-wheel drive by derivative
Body variants
X3 → G45 → Sports Activity Vehicle
X3 G45: history, design and engineering
How this generation came about, what made it different and how the selected sports activity vehicle fits into the family.
G45 is the fourth combustion-based X3 and launched in 2024 with a new body, revised modular platform and BMW Operating System 9. It is distinct from the Neue Klasse electric iX3 NA5: the two vehicles share market positioning but not body code, platform or technical specification.
The initial range combined 48-volt petrol and diesel derivatives with the X3 30e xDrive plug-in hybrid and the six-cylinder X3 M50 xDrive. Model names changed between regions — notably the US X3 30 xDrive and M50 xDrive — so output and standard equipment must remain tied to the publishing market.
BMW placed global production at Spartanburg and added other regional plants for local supply. Battery capacity, electric range and luggage data for the plug-in hybrid differ from combustion derivatives; the M50 is an M Performance model, not a replacement for a separately developed full X3 M.
2024–presentgeneration lifecycle
1body branches
4engine/drive families
5range designations
G45factory code
X family · front- or all-wheel drive by derivativearchitecture
Sports Activity Vehicle: dimensions and packaging
Dimensions can change with body, market and model year, so this page keeps them tied to the exact factory branch.
Length4,755 mm
Width1,920 mm
Height1,660 mm
Wheelbase2,865 mm
Luggage460–1,700 L
Fuel tank50–65 L
Seats5
Doors5-door SAV
| Body | Code | Production | Doors / seats | Length | Luggage |
|---|---|---|---|---|---|
| Sports Activity Vehicle | G45 | 2024–present | 5-door SAV / 5 | 4,755 mm | 460–1,700 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 vehicle applications; output and availability remain market- and model-year-specific.
| Model | Years | Engine | Output | Transmission | Drive | Market | Source |
|---|---|---|---|---|---|---|---|
| X3 20 xDrive | 2024–present | B48B20 turbo + 48 V mild hybrid | 208 PS system | 8AT | AWD | Europe | The all-new 2025 BMW X3 |
| X3 30 xDrive | 2024–present | B48B20 turbo + 48 V mild hybrid | 255 hp system | 8AT | AWD | North America | The all-new 2025 BMW X3 |
| X3 M50 xDrive | 2024–present | B58B30 turbo inline-six + 48 V mild hybrid | 398 PS / 393 hp US | 8AT | AWD | Global range | The all-new 2025 BMW X3 |
| X3 20d xDrive / 40d xDrive | 2024–present | B47D20 / B57D30 diesel + 48 V mild hybrid | 197–303 PS system | 8AT | AWD | Europe | The all-new 2025 BMW X3 |
| X3 30e xDrive | 2024–present | B48B20 turbo + electric motor | 299 PS system | 8AT hybrid | AWD | Europe | The all-new 2025 BMW X3 |
Factory designations
20 xDrive · 30e xDrive · M50 xDrive · 20d xDrive · 40d xDrive
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
- G45: 4,755 mm × 1,920 mm × 1,660 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.
Fourth X3 revealed
BMW published the new body, digital architecture and first regional drivetrain ranges.
Worldwide launch
Sales began with market-specific mild-hybrid, plug-in-hybrid and M Performance derivatives.
Production expansion
Spartanburg global supply was supplemented by regional manufacturing programs.
Separate from Neue Klasse iX3
The electric NA5 family follows its own platform, body code and launch history.
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 Vehicle
G45X3 G45 is a distinct G45 body branch. A five-door high-riding body combining a flexible cargo area with the road-focused dynamics of BMW’s X family. Engines/drive: B48 petrol mild hybrid, B58 petrol mild hybrid, B47 diesel mild hybrid, plug-in hybrid.
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
- G45 — Sports Activity Vehicle
- Range designations
- 20 xDrive, 30e xDrive, M50 xDrive, 20d xDrive, 40d xDrive
- Powertrain families
- B48 petrol mild hybrid, B58 petrol mild hybrid, B47 diesel mild hybrid, plug-in hybrid
- 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 X3 (G45)Wikipedia contributors
Secondary launch, production, model and platform overview.
- 02The All-New 2025 BMW X3BMW Group PressClub
Factory launch, body, technology and production information in US-market scope.
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.
- G45 and NA5 must remain separate generation nodes even when commercial naming makes both an X3/iX3 choice in the same segment.
- The plug-in hybrid needs market-specific usable battery, test-cycle range, charge rate, luggage and weight fields.
- 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: Alexander Migl, 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