It is not. Timing belt is the belt that drives the engine internal pulleys. You don't see this belt as it is hidden behind the timing cover.
Now, serpentine belt is the belt that drives all the accessory pulleys such as the alternator, power steering, and air conditioning. In your case, you have two serpentine belts. If you open your hood, looking at the engine, you will see two belts under the belt cover.
The belt going towards the right (passenger side) is the one that drives your alternator and power steering. That is the one that your mechanic needs to check and make sure that it is tight, and still in good condition. The one on the driver side drives your air conditioning.
Monday, March 30th, 2009 AT 9:09 PM