BMW S65 Engine

The BMW S65 engine is an engineering masterpiece derived from the brand’s Formula 1 technology and developed exclusively for the E9X-generation BMW M3 (2008–2013). This 4.0-liter naturally aspirated V8, coded S65B40, produces 414 horsepower at 8,300 rpm and 295 lb-ft of torque, offering a linear, high-revving power delivery unlike any other M engine. Built from a lightweight aluminum block with a forged steel crankshaft and individual throttle bodies per cylinder, it embodies BMW’s motorsport DNA. With a redline of 8,400 rpm and dual VANOS variable valve timing, the S65 delivers razor-sharp throttle response, exhilarating exhaust note, and race-inspired durability.

This used BMW S65 engine is ideal for both OEM replacements and high-performance builds, ensuring factory-grade fitment, tested integrity, and long-term reliability. For enthusiasts seeking an authentic M experience, the S65 remains one of BMW’s most celebrated naturally aspirated engines. You can also explore related options like the BMW N62 Engine or the BMW S85 V10 Engine for other performance-driven powerplants.

2008–2009 BMW M3 S65B40 Engine

The 2008–2009 BMW M3 introduced the S65B40 — the first V8 in M3 history. With 414 hp at 8,300 rpm, it combined instantaneous throttle response with a lightweight design. Its 7-bearing crankshaft and semi-dry sump oiling ensured superior lubrication under high lateral G-forces, ideal for track use. Paired with the 6-speed manual or 7-speed DCT, the engine offered thrilling precision and an unmatched rev-happy character, making it a benchmark in naturally aspirated performance.

2010–2011 BMW M3 S65B40 Update

In 2010, BMW refined the S65 with software calibration and cooling enhancements for improved consistency under high load. While output remained at 414 horsepower, throttle response and efficiency improved slightly. This variant continued to deliver the S65’s signature balance of high-rev excitement and mid-range torque, making it a favorite for M3 purists and performance rebuilds. Ideal for both coupe (E92) and sedan (E90) trims, it provides OEM-level reliability and responsiveness.

2012–2013 BMW M3 S65B40

The final iteration of the S65 powered the last naturally aspirated M3 models before the transition to turbocharging. This version featured optimized bearings, improved VANOS mapping, and revised ECU tuning for smoother power delivery. Producing 414 hp and 295 lb-ft, it provided an ideal combination of refinement and aggression. As the last of its kind, the S65 engine is highly sought after for restorations and high-performance conversions, ensuring long-lasting value and track-level performance.

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