1. Disconnect the battery. This will help to prevent any electrical damage while you're working.
2. Drain the coolant. This is important to do so that the coolant doesn't spill all over when you remove the heater matrix.
3. Remove the dashboard. This will give you access to the heater matrix.
4. Remove the heater matrix. Be careful not to damage any of the hoses or fittings when you're removing the heater matrix.
5. Install the new heater matrix. Make sure that you connect all of the hoses and fittings correctly.
6. Refill the coolant.
7. Reconnect the battery.
8. Test the heater. Make sure that the heater works properly by turning it on and off a few times.
Here are some additional tips for changing a heater matrix on a Toyota Previa:
- Use a Haynes or Chilton manual to help you with the steps involved.
- If you're not comfortable working on cars, you can have a mechanic replace the heater matrix for you.
- Make sure that you have all of the necessary tools and parts before you start the project.
- Be careful not to damage any of the hoses or fittings when you're removing or installing the heater matrix.
- If you have any questions about how to replace the heater matrix, don't hesitate to consult with a mechanic.
