Replacing the drive belt (also known as the serpentine belt) on a 1996-2003 Mazda Millenia involves several steps. click here for more details on the download manual…..

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Mazda Millenia/626 Check Engine Codes 1996-2002 Part 2

Here’s a detailed guide to help you through the process. Before starting, ensure you have the necessary tools and parts.

### Tools and Materials Needed:
1. **New Drive Belt** – Make sure it’s compatible with your Mazda Millenia model.
2. **Wrenches/Sockets** – Typically, you’ll need a 10mm or 12mm socket and ratchet.
3. **Belt Tensioner Tool or Wrench** – This is sometimes called a serpentine belt tool. A standard wrench can also work.
4. **Flashlight** – To see better in tight areas.
5. **Ratcheting Wrench** – Optional, but can make the job easier.
6. **Gloves** – To protect your hands.
7. **Safety Goggles** – To protect your eyes.

### Steps to Replace the Drive Belt:

#### 1. Preparation
– **Ensure Safety:** Park the vehicle on a flat surface, engage the parking brake, and turn off the ignition. Disconnect the negative terminal of the battery to prevent any electrical shorts or accidental starts.

#### 2. Locate the Drive Belt
– **Open the Hood:** Secure it with the prop rod.
– **Inspect the Engine Compartment:** The drive belt is usually located in the front of the engine, connecting various components such as the alternator, power steering pump, and air conditioning compressor.

#### 3. Identify the Belt Routing
– **Belt Routing Diagram:** Most vehicles have a belt routing diagram located near the radiator support or on the underside of the hood. If not, you can take a picture of the current belt configuration for reference.

#### 4. Release the Tension on the Belt
– **Locate the Tensioner:** The belt tensioner is a pulley that keeps the drive belt tight. It typically has a square hole or a notch for a wrench.
– **Use the Tensioner Tool:** Insert the tool into the tensioner and turn it counterclockwise to relieve tension on the belt. This may require some force, depending on the tensioner’s spring strength.

#### 5. Remove the Old Belt
– **Slide the Belt Off:** Once the tension is relieved, you can slide the belt off the pulleys. Start with the easiest pulley to access, then work it off the others.

#### 6. Inspect Components
– **Check Pulleys and Tensioner:** Look for any signs of wear, such as cracks, frays, or excessive wear on the pulleys and the tensioner. If the tensioner is weak or the pulleys are damaged, consider replacing them as well.

#### 7. Install the New Drive Belt
– **Route the New Belt:** Using the routing diagram or your reference picture, thread the new belt around the pulleys. ensure it sits properly in the grooves of each pulley.
– **Reapply Tension:** Once the belt is in place, use the tensioner tool again to move the tensioner and slip the belt over it. Release the tensioner slowly to apply tension to the new belt.

#### 8. Check Alignment
– **Visual Inspection:** ensure that the belt is properly aligned and seated in all pulleys.
– **Spin Pulleys:** Manually spin the pulleys to ensure they move freely and the belt is functioning correctly.

#### 9. Reconnect Battery
– **Reconnect the negative Terminal:** Once everything is double-checked, reconnect the battery and ensure it is secure.

#### 10. Start the Engine
– **Test the Installation:** Start the engine and observe the belt. It should run smoothly without any noise or slipping. If you hear any unusual sounds, turn off the engine and recheck the installation.

### Conclusion
Replacing the drive belt on a 1996-2003 Mazda Millenia can be performed with basic tools and a little mechanical knowledge. ensure to follow safety precautions and take your time to do the job correctly. If you feel uncertain at any point, it’s advisable to consult a professional mechanic.
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