The timing belt is a rubber belt located in the engine compartment behind the drive belts. Its job is to keep the crankshaft in sync with the camshaft(s), ensuring the proper timing and operation of the engine valves and engine overall. When replacing a timing belt, also replace the water pump, tensioner, and pulleys. If the pulleys and tensioners should fail after only replacing the belt, it can cause valve or piston damage and lead to more expensive repairs, in order to have the engine run properly. It is essential to replace the whole set. We only replace the water pump if it is driven by the timing belt (true for 60% of the cars). Follow the maintenance schedule provided by the manufacturer and replace the timing belt as recommended.