BMW M3 E92 E90 S65B40A Engine – 309kW / 420PS Complete

BMW M3 E92 E90 S65B40A Engine – 309kW / 420PS Complete

The BMW S65B40A is not simply an engine — it is one of the greatest naturally aspirated engines ever produced for a road car. A 4.0-litre, high-revving V8 that screams to 8,300 RPM, produces 309kW / 420PS of pure, unassisted power, and delivers an exhaust note and driving experience that turbocharged engines simply cannot replicate. It is the beating heart of the BMW M3 E92 and E90 — and one of the most sought-after engine units on the classic performance car market.

Whether you are replacing a failed or damaged S65 unit, completing a full engine rebuild, or sourcing the ultimate naturally aspirated V8 for a performance project, this complete S65B40A engine represents an exceptional opportunity.

Key Features:

• Genuine BMW S65B40A complete engine — M3 E92 E90 specification
• 4.0-litre naturally aspirated V8 — pure high-revving M performance
• 309kW / 420PS at 8,300 RPM — full factory power output
• 400Nm peak torque — broad and linear delivery across RPM range
• Individual throttle body induction — eight throttle bodies, one per cylinder
• Dry-sump lubrication system — motorsport-derived for sustained high-RPM use
• High-revving naturally aspirated character — no turbo lag, pure mechanical response
• Complete engine assembly — all ancillaries as described in listing
• Direct OEM replacement for BMW M3 E90 Saloon and E92 Coupe
• Confirmed mileage and condition — verify with seller

Engine Specification:

• Engine Code: S65B40A
• Displacement: 3,999cc
• Configuration: V8 — 90° bank angle
• Power: 309kW / 420PS at 8,300 RPM
• Torque: 400Nm at 3,900 RPM
• Compression Ratio: 12.0:1
• Induction: Individual throttle bodies — naturally aspirated
• Lubrication: Dry-sump system
• Rev Limit: 8,300 RPM

Model Compatibility:

• BMW M3 E92 Coupe (2007–2013)
• BMW M3 E90 Saloon (2007–2011)
• BMW M3 E93 Convertible (2007–2013)
• (Confirm exact build date and specification with seller)

Ideal For:

• Direct OEM engine replacement on BMW M3 E90 E92 E93
• Full S65 engine rebuild and restoration
• Performance and motorsport-inspired S65 build projects
• Collectors restoring M3 E92 E90 to full mechanical specification
• Engine swap projects requiring the legendary S65 V8 unit
• Long-term M3 custodians investing in a quality replacement engine