The smooth shifting of gears in your Toyota 4Runner is provided by the efficient operation of the drive train. When it comes to the efficient operation of the Toyota 4Runner drive train, timing is the absolute operational term since it is the key to its success. Now perfect timing cannot be achieved without the employment of a high performance timing belt like the Koyo timing belt assembly. The essentiality of the timing Koyo timing belt assembly lies in the fact that the quintessential ingredient of achieving the optimum engine configuration is perfect synchronization of each and every process that goes on inside the Toyota 4Runner engine every time the vehicle is active. The Koyo belt specifically the upper idler bearing aids in ensuring that the spark is fired at exactly the right moment so that maximum combustion is achieved. The Koyo timing belt idler is that segment of the Koyo timing belt assembly which functions like brakes in stopping or slowing down the motion of the Koyo timing belt. The Koyo timing belt idler along with the other Koyo timing belt components should be kept in perfect working condition to ensure that optimum operation of the Toyota 4Runner engine system is reached. Order your high grade Koyo timing belt idler bearing today and avail of our running promos like the same day shipping offer as well as discounts on selected items.