Powertrain families
S54B32 inline-six
M3 (E46) — Cabriolet
2000–2006
Editorially reviewedReviewed 2026-08-10; market and model-year scope is stated in the record sources.
- Internal code
- E46/2C
- Production
- 2000–2006
- Body style
- 2-door convertible
- Platform
- BMW M · longitudinal layout · rear-wheel drive
Body variants
M3 → E46 → Cabriolet
M3 E46: history, design and engineering
How this generation came about, what made it different and how the selected cabriolet fits into the family.
E46 M3 returned the production range to coupé and convertible bodies and centred it on the 3.2-litre S54 inline-six. The engine's high-rev character, variable M differential and substantially reworked chassis separated it from an ordinary E46 despite the shared model family.
Customers could choose a six-speed manual or the SMG II automated manual; SMG is not a torque-converter automatic. The lightweight CSL added a revised intake, carbon roof and body panels, unique chassis calibration and greater output, while the later CS/Competition Package sat between standard and CSL depending on market.
North American output ratings and Competition Package naming differ from European CS usage. The CSL was not officially sold in every market, and the V8-powered M3 GTR road and race cars require their own low-volume records rather than being folded into the S54 range.
2000–2006generation lifecycle
2body branches
1engine/drive families
3range designations
E46factory code
BMW M · longitudinal layout · rear-wheel drivearchitecture
Cabriolet: dimensions and packaging
Dimensions can change with body, market and model year, so this page keeps them tied to the exact factory branch.
Length4,492 mm
Width1,780 mm
Height1,372 mm
Wheelbase2,731 mm
Luggage300 L
Fuel tank63 L
Seats4
Doors2-door convertible
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 cabriolet applications; output and availability remain market- and model-year-specific.
| Model | Years | Engine | Output | Transmission | Drive | Market | Source |
|---|---|---|---|---|---|---|---|
| M3 | 2000–2006 | S54B32 inline-six | 343 PS / 333 hp US | 6MT / 6SMG | RWD | Global range | The BMW M3 E46 |
Factory designations
M3 · M3 Competition Package/CS · M3 CSL
High-performance powertrain
Engine, cooling, exhaust, software and transmission form a distinct M or ALPINA specification rather than an option package on the base model.
Diesel derivatives
Where diesels were offered, output, injection generation and emissions hardware are recorded market by market.
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: BMW M · longitudinal layout · rear-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
- E46/2: 4,492 mm × 1,780 mm × 1,372 mm
- E46/2C: 4,492 mm × 1,780 mm × 1,372 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.
E46 M3 production
The S54 coupé entered production with a six-speed manual.
Convertible and SMG II
The open body and automated-manual option broadened the range.
M3 CSL
A limited lightweight coupé introduced extensive carbon construction and a more focused chassis.
Production ends
Coupé and convertible production concluded ahead of the V8 generation.
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
E46/2M3 E46/2 is a distinct E46 body branch. A lower-roof two-door body with longer doors and a more overtly sporting brief than the corresponding sedan. Engines/drive: S54B32 inline-six.
Cabriolet
E46/2CM3 E46/2C is a distinct E46 body branch. An open body with a folding roof and generation-specific structural reinforcement, seating and luggage packaging. Engines/drive: S54B32 inline-six.
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
- E46/2 — Coupe; E46/2C — Cabriolet
- Range designations
- M3, M3 Competition Package/CS, M3 CSL
- Powertrain families
- S54B32 inline-six
- 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 M3Wikipedia contributors
Secondary E46 body, powertrain, CSL and regional overview.
- 02The BMW M3 generations at a glanceBMW M
BMW M retrospective covering the engineering character, body programme and key derivatives of all six M3 generations.
- 03The BMW M3 E46BMW M
BMW M retrospective for the S54, body range and CSL.
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.
- SMG II is an electrohydraulically shifted manual transmission, not a conventional automatic.
- M3 GTR V8 road/race records and CSL must not inherit standard S54 specifications.
- 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.
3 primary references · market differences documentedPhotography: Charles from Port Chester, New York, CC BY 2.0 · 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