1. The Toyota Owner's Manual: The owner's manual for your vehicle may include a diagram of the engine. Check the index of the manual to see if there is a section on engine diagrams.
2. Online Resources: There are many websites that offer engine diagrams for different vehicles. Some popular websites include:
- AutoZone: https://www.autozone.com/diy/repair-guides/toyota-highlander-2001-03/engine/engine-diagrams
- Advance Auto Parts: https://www.advanceautoparts.com/parts/engine/engine-diagram/
- Parts Geek: https://www.partsgeek.com/catalog/2003-toyota-highlander-diagrams.html
3. Toyota Dealership: You can also contact a local Toyota dealership and ask if they have an engine diagram for your vehicle. They may have diagrams available for purchase or may be able to provide you with a copy for free.
4. Haynes or Chilton Repair Manual: If you are willing to purchase a repair manual for your vehicle, you may also be able to find a detailed diagram of the engine. Haynes and Chilton manuals are commonly available at auto parts stores.
5. Consult with a Mechanic: If you are having difficulty finding a diagram or if you have specific questions about your vehicle's engine, you can also consult with a qualified mechanic. They may have access to diagrams or resources that you do not.
Remember, if you are not comfortable identifying various engine components, it is best to consult with a qualified mechanic to avoid any costly mistakes.
