The throttle body is an indispensable component of the vehicle that plays a key role in controlling the amount of air flowing into the engine. A perfect balance of fuel and air is introduced into the BMW’s nucleus only the throttle body is at its matchless order. When it fails, it does not allow BMW to run efficiently. BMW is a luxury car. Thus, its maintenance cost would be high. To save money on BMW maintenance, you must know the cause and symptoms of throttle body failure. Consult a certified BMW mechanic while replacing the throttle body.