MACE 64MM ELECTRONIC THROTTLE BODY TO SUIT BMW 5 SERIES 520I M54B22 2.2L I6Smooth Drive Starts Here MACE Standard Throttle Body The throttle body manages airflow into the engine, directly influencing how the vehicle operates. When functioning correctly, it helps maintain stable idling, responsive throttle control, and efficient fuel use. A faulty unit can cause hesitation, uneven idle, or trigger warning lights. This MACE standard throttle body is designed as a straightforward, factory style replacement. It restores accurate