The BMW S85 is one of the most extraordinary engines M GmbH ever built—a naturally aspirated 5.0-liter V10 that channeled BMW's Formula 1 involvement into a road-going powerplant. Produced from 2005 to 2010, it remains the only V10 ever fitted to a BMW M car, and its stratospheric 8,250 rpm redline gave it a character unlike anything before or since.
Engineering & Specs
The S85 was designed around motorsport principles: high revs, individual throttle bodies, and a compact, high-output architecture. It produced 500 horsepower and 384 lb-ft of torque, with power arriving high in the rev band—rewarding drivers willing to wind it out.
- Configuration: 5.0L naturally aspirated V10
- Output: 500 hp / 384 lb-ft
- Redline: 8,250 rpm
- Transmission: paired with a 7-speed SMG
- Production: 2005–2010
The 7-speed SMG gearbox delivered lightning-fast shifts for the era, though its automated-clutch behavior at low speeds is an acquired taste. Learn more about M's engineering philosophy in the BMW DNA encyclopedia.
Which BMWs Used It
The S85 appeared in a tight, celebrated lineup:
- E60 M5 (sedan)
- E63/E64 M6 (coupe and convertible)
If you're evaluating a specific car, use our VIN decoder to confirm it left the factory with the S85 rather than a swapped or misidentified drivetrain.
Reliability & Common Issues
The S85 is a high-strung, high-maintenance engine that demands a knowledgeable owner. Rod bearings are the most discussed concern—many enthusiasts proactively replace them to protect the engine's longevity. The VANOS system, throttle actuators, and the SMG hydraulic pump are also known wear points that should be inspected on any purchase.
Because of its complexity, deferred maintenance is expensive to correct. A well-documented service history is worth more than a low sticker price.
Ownership & Legacy
The S85 shares its DNA with the V8 S65 that powered the E90/E92 M3—essentially a V10 with two cylinders removed—and it stands alongside classic high-revving M engines like the inline-six S54. As modern M motors moved to forced induction with the S55 and S58, the naturally aspirated S85 became a defining moment in the brand's history.
For buyers, the reward is an engine note and rev range that no turbocharged successor can replicate. The S85 is a genuine enthusiast trophy—one that repays diligent maintenance with an unforgettable driving experience.