A throttle body service is the cleaning out of the throttle body bore and throttle blade. This is important for keeping the vehicle running smooth, efficient, and safely. Overtime, carbon and sludge buildup in/on the throttle body causing it to not perform properly. Having it perform at less than its best for an extended period of time can cause the throttle body to fail and require replacement. Throttle body replacement is expensive; prices vary depending on the type of vehicle. It’s like anything else a little maintenance can save a lot of money.