S50B30

The S50B30 is an inline-six cylinder internal combustion engine produced by BMW. It is part of the BMW M family of engines, specifically designed for high-performance applications. Introduced in the early 1990s, this engine is known for its robust construction and spirited power delivery. It features a displacement of 3.0 liters (2990 cc) and typically utilizes a dual overhead camshaft (DOHC) valvetrain with four valves per cylinder.

The S50B30 was notably used in several iconic BMW models, most prominently the E36 M3 in European markets. In these applications, it was celebrated for its responsiveness and a characteristic high-revving nature. Engine management systems were advanced for their time, incorporating features like individual throttle bodies in some variants to optimize airflow and throttle response. Variations of the S50B30 engine existed, with power outputs generally ranging from approximately 286 horsepower to over 300 horsepower depending on the specific tune and market. Its relatively compact design for a six-cylinder engine also contributed to favorable weight distribution in the vehicles it powered. The S50B30 is considered by many enthusiasts to be a significant engine in BMW's performance history.