These models incorporate a serpentine drivebelt that has an automatic tensioner adjuster thus the state of the belt and its tension is crucial for the engine . Because of their relative materiality and the high stress levels to which they are subjected, drivebelts are necessarily worn and require regular inspection with no provision for adjustment on these models. The serpentine drivebelt is the agent of power transmission of all the accessories of a car. To check the drivebelt, first, switch off the engine, rev the bonnet, and look for the belt. Be sure when twist the belt that both sides are to be checked In the identification of any sign of separation, cracking, fraying or glazing a flashlight should be used to have a view of each belt. In any case, the belt must be replaced to guarantee that the functioning of the engine will not be compromised. In the same way, examine the condition of the periodic drivebelt check for string tension; if the indicator notch is further than the fixed mark, the belt has to be changed. For replacement, then remove the negative battery cable, slightly rotate the right front wheel, securely lift the vehicle, and then remove the right inner fender splash shield. Loosen the belt tensioner clockwise, then secure it with a drill bit or metallic bar; do not remove the tensioner pulley bolt. Take off the old drivebelt and then put on the new one properly to its routing; after that reconnect the battery, and perhaps, go through the re-learn process, if needed. To replace the automatic tensioner, first, remove the drivebelt, and then remove the mounting bolt of tensioner for 2.0L engine and two mounting bolts for 2.5L engine and finally, install a new tensioner in the opposite way and tighten fasteners to the recommended torque.