The VW Beetle air-cooled engine is a mechanically honest flat-four that helped define motoring history. Mounted in the rear, it relies on a belt-driven fan to push air over finned cylinders and heads, eliminating the need for water, radiators, or complex plumbing. Its horizontally opposed layout keeps the engine compact and low, while its carbureted simplicity makes it easy to understand, maintain, and repair. Not built for speed or sophistication, it earned its legendary status through durabili