Powertrain families
B48 petrol I4 · B47 diesel I4 · B58 petrol I6 · B57 diesel I6 · Gen5 electric drive in i4
4 Series (G22/G23/G26) — Gran Coupe
2020–present
Editorially reviewedReviewed 2026-08-10; market and model-year scope is stated in the record sources.
- Internal code
- G26
- Production
- 2020–present
- Body style
- 4-door fastback
- Platform
- longitudinal layout · rear- or all-wheel drive
Body variants
4 Series → G22/G23/G26 → Gran Coupe
4 Series G22/G23/G26: history, design and engineering
How this generation came about, what made it different and how the selected gran coupe fits into the family.
G22/G23/G26 is the second 4 Series generation and again divides into three materially different bodies: G22 coupe, G23 soft-top convertible and G26 five-door Gran Coupe. The convertible's panel-bow fabric roof reversed the predecessor's retractable-hardtop solution and reduced roof-system mass while preserving a distinct reinforced body.
BMW revealed the G22 in June 2020 for an October market launch, followed by G23 in September 2020 and G26 in June 2021. The Gran Coupe is produced in Munich beside the battery-electric i4, which uses the G26 body concept but requires a separately scoped electric model record as well as clear cross-linking from this generation.
The 2024 lifecycle work was not one identical update for every body: coupe and convertible were documented first, followed by the Gran Coupe. Four- and six-cylinder combustion engines, mild-hybrid systems and xDrive vary by market, while G82/G83 M4 remains a distinct high-performance generation rather than a trim row inside G22/G23.
2020–presentgeneration lifecycle
3body branches
5engine/drive families
9range designations
G22/G23/G26factory code
longitudinal layout · rear- or all-wheel drivearchitecture
Gran Coupe: dimensions and packaging
Dimensions can change with body, market and model year, so this page keeps them tied to the exact factory branch.
Length4,783 mm
Width1,852 mm
Height1,442 mm
Wheelbase2,856 mm
Luggage470–1,290 L
Fuel tank40–59 L
Seats5
Doors4-door fastback
| Body | Code | Production | Doors / seats | Length | Luggage |
|---|---|---|---|---|---|
| Coupe | G22 | 2020–present | 2-door coupe / 4 | 4,768 mm | 440 L |
| Cabriolet | G23 | 2020–present | 2-door convertible / 4 | 4,768 mm | 300–385 L |
| Gran Coupe | G26 | 2020–present | 4-door fastback / 5 | 4,783 mm | 470–1,290 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 gran coupe applications; output and availability remain market- and model-year-specific.
| Model | Years | Engine | Output | Transmission | Drive | Market | Source |
|---|---|---|---|---|---|---|---|
| 420i | 2020–present | B48B20 turbo inline-four | 184 PS | 8AT | RWD | Global range | The all-new BMW 4 Series Coupé |
| 430i | 2020–present | B48B20 turbo inline-four | 245–258 PS | 8AT | RWD / xDrive | Global range | The all-new BMW 4 Series Convertible |
| M440i xDrive | 2020–present | B58B30 turbo inline-six + 48 V mild hybrid | 374–387 PS | 8AT | AWD | Global range | The all-new BMW 4 Series Gran Coupé |
| 420d | 2020–present | B47D20 diesel inline-four + 48 V mild hybrid | 190 PS | 8AT | RWD / xDrive | Europe | The all-new BMW 4 Series Coupé |
| 430d xDrive | 2021–present | B57D30 diesel inline-six + 48 V mild hybrid | 286 PS | 8AT | AWD | Europe | The all-new BMW 4 Series Convertible |
| M440d xDrive | 2021–present | B57D30 twin-turbo diesel + 48 V mild hybrid | 340 PS | 8AT | AWD | Europe | The all-new BMW 4 Series Gran Coupé |
| i4 eDrive35 | 2022–present | Gen5 eDrive · rear motor | 286 hp | single-speed | RWD | Global range | The new BMW i4 and BMW 4 Series Gran Coupé |
| i4 eDrive40 | 2021–present | Gen5 eDrive · rear motor | 340 hp | single-speed | RWD | Global range | The new BMW i4 and BMW 4 Series Gran Coupé |
| i4 xDrive40 | 2024–present | Gen5 eDrive · dual motor | 401 hp | single-speed | AWD | Global range | The new BMW i4 and BMW 4 Series Gran Coupé |
| i4 M50 xDrive | 2021–2025 | Gen5 eDrive · dual motor | 544 hp peak | single-speed | AWD | Global range | The new BMW i4 and BMW 4 Series Gran Coupé |
| i4 M60 xDrive | 2025–present | Gen5 eDrive · dual motor · SiC inverters | 601 hp peak | single-speed | AWD | Europe | BMW model updates, summer 2025 |
Factory designations
420i · 430i · M440i xDrive · 420d · 430d xDrive · M440d xDrive · i4 eDrive35/40 · i4 xDrive40 · i4 M50/M60
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: longitudinal layout · rear- or all-wheel drive. 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
- G22: 4,768 mm × 1,852 mm × 1,383 mm
- G23: 4,768 mm × 1,852 mm × 1,384 mm
- G26: 4,783 mm × 1,852 mm × 1,442 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.
G22 coupe revealed
BMW introduced the second-generation coupe with a wider visual separation from the G20 3 Series.
G23 returns to a soft top
The convertible adopted a lighter panel-bow fabric roof in place of F33's folding hardtop.
G26 Gran Coupe and i4
The five-door body entered production in Munich alongside its electric i4 counterpart.
Lifecycle revisions
Lighting, interior controls, digital systems and selected drivetrains were revised with body-specific effective dates.
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.
Coupe
G224 Series G22 is a distinct G22/G23/G26 body branch. A lower-roof two-door body with longer doors and a more overtly sporting brief than the corresponding sedan. Engines/drive: B48 petrol I4, B47 diesel I4, B58 petrol I6, B57 diesel I6, Gen5 electric drive in i4.
Cabriolet
G234 Series G23 is a distinct G22/G23/G26 body branch. An open body with a folding roof and generation-specific structural reinforcement, seating and luggage packaging. Engines/drive: B48 petrol I4, B47 diesel I4, B58 petrol I6, B57 diesel I6, Gen5 electric drive in i4.
Gran Coupe
G264 Series G26 is a distinct G22/G23/G26 body branch. A four-door fastback combining a coupe-like roofline with easier rear access and a large tailgate or sedan-style luggage opening. Engines/drive: B48 petrol I4, B47 diesel I4, B58 petrol I6, B57 diesel I6, Gen5 electric drive in i4.
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
- G22 — Coupe; G23 — Cabriolet; G26 — Gran Coupe
- Range designations
- 420i, 430i, M440i xDrive, 420d, 430d xDrive, M440d xDrive, i4 eDrive35/40, i4 xDrive40, i4 M50/M60
- Powertrain families
- B48 petrol I4, B47 diesel I4, B58 petrol I6, B57 diesel I6, Gen5 electric drive in i4
- 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 4 Series (G22)Wikipedia contributors
Secondary body-code, production, platform and model overview for G22/G23/G26.
- 02The all-new BMW 4 Series CoupéBMW Group PressClub
Factory G22 launch timing, dimensions, chassis and initial drivetrain scope.
- 03The all-new BMW 4 Series ConvertibleBMW Group PressClub
Factory G23 body, panel-bow roof and March 2021 global-launch documentation.
- 04The all-new BMW 4 Series Gran CoupéBMW Group PressClub
Factory G26 launch, Munich production and November 2021 market timing.
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.
- G26 combustion cars and G26-based i4 share a body concept and production line, but electric specifications and model history remain in the separate i4 node.
- G82/G83 M4 is not a regular engine derivative. The exact 2024-on drivetrain matrix also needs separate regional effective dates.
- 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.
4 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