BMW S54B32 Engine & 6-Speed Manual Gearbox | 3.2L Inline-Six | Z4 M Roadster (2006) | 9,000 Miles
Offered for sale is a BMW S54B32 3.2-liter inline-six engine paired with its ZF 6-speed manual gearbox, removed from a 2006 BMW Z4 M Roadster that was declared a total loss due to chassis damage. This powertrain, showing only ~9,000 miles, represents one of the cleanest and lowest-mileage S54 packages available — ideal for restoration projects, performance conversions, or collector use.
The S54 is widely recognized as BMW M’s final naturally aspirated inline-six masterpiece, delivering a thrilling combination of race-bred precision, high-revving performance, and bulletproof engineering.
Technical Specifications
| Specification | Details |
|---|---|
| Engine Code | S54B32 |
| Displacement | 3,246 cc (3.2 Liters) |
| Configuration | Inline-6, Naturally Aspirated |
| Bore x Stroke | 87 mm x 91 mm |
| Compression Ratio | 11.5 : 1 |
| Power Output (Factory) | 330 HP (246 kW) @ 7,900 rpm |
| Torque (Factory) | 262 lb-ft (355 Nm) @ 4,900 rpm |
| Block Material | Cast-Iron |
| Cylinder Head | Aluminum Alloy |
| Valvetrain | DOHC, 24-Valve |
| Induction | Six Individual Throttle Bodies |
| Variable Valve Timing | Double VANOS (Intake & Exhaust) |
| Fuel System | Sequential Multi-Point Injection (Siemens MS S70 ECU) |
| Transmission | ZF 6-Speed Manual Gearbox |
| Drivetrain | Rear-Wheel Drive |
| Mileage | ~9,000 Miles (Verified) |
Included Components
BMW S54B32 Engine Assembly
• Complete long block (cast-iron block, alloy head, crankshaft, pistons, cams)
• Dual overhead camshafts and double VANOS system intact
• Six individual throttle bodies with linkage
ZF 6-Speed Manual Gearbox
• Matching transmission from same donor car
• Includes shifter assembly and linkage
Electronic & Control Units
• Siemens ECU (Engine Control Module)
• Complete engine wiring harness
Exhaust & Ancillary Components
• Pair of OEM exhaust manifolds
• Ancillary systems including alternator, starter, sensors, and brackets
Miscellaneous Equipment
• Air intake and mounting hardware
• OEM clutch assembly and flywheel (upon request, if available)
Condition Notes
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Removed from a 2006 BMW Z4 M Roadster (E85)
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Vehicle had ~9,000 verified miles before dismantling
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Engine turns freely with no visible internal damage
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Stored properly in dry, climate-controlled conditions since removal
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Includes all factory harnesses, control units, and sensors for plug-and-play potential
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Ideal for retrofit into BMW E30, E36, E46, or Z3 chassis, or as a replacement for an existing S54-powered car
Compatibility
BMW Z4 M Roadster / Coupé (E85 / E86)
BMW M3 (E46)
Engine swap candidates: E30, E36, E39, E9x track builds
Suitable for OEM restoration or custom performance conversions
Collector Significance
The S54B32 remains one of the most celebrated naturally aspirated inline-six engines ever produced. Derived from BMW’s S50 and S52 architecture, it represents the pinnacle of the M Division’s pre-turbo engineering — featuring an 8,000 rpm redline, precision-balanced rotating assembly, and motorsport-level throttle response.
Its rarity in such low-mileage, complete condition — paired with its original ZF 6-speed manual gearbox and factory electronics — makes this a top-tier acquisition for collectors or high-end restoration shops.
BMW S54B32 Engine & ZF 6-Speed Manual Gearbox, sourced from a 2006 Z4 M Roadster showing only 9,000 miles. This is a complete plug-and-play performance powertrain, including the ECU, wiring harness, exhaust manifolds, and all major ancillaries.
Perfect for OEM replacements, high-performance E30/E36/E46 conversions, or collector preservation — an exceptional example of BMW M engineering at its finest.
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