What is a VANOS engine and how does it work?

I am considering purchasing a BMW M3, and I keep hearing about VANOS engines. Can you explain what it is and how it affects performance?

VANOS stands for Variable Nockenwellen Steuerung, which translates to Variable Camshaft Control. In simple terms, it is a system that controls the timing of the intake and exhaust valves to optimize engine performance. It uses a hydraulic mechanism to adjust the camshafts in real-time, allowing for better torque, power, and fuel efficiency.

VANOS is a crucial component in BMW's high-performance engines, so it is definitely something to consider when looking at an M3. It may seem complicated, but in the end, having a VANOS engine means you'll have a smoother and more responsive driving experience.