However, there's no single guaranteed location. The best approach is to:
1. Consult your owner's manual: This is the most reliable source. It should have a diagram showing the location of the engine number.
2. Check online resources: Search for "1998 Toyota RAV4 engine number location" on sites like YouTube or automotive forums. Pictures from other owners can be very helpful.
3. Look carefully around the engine block: As mentioned, it's generally on the front, driver's side. Check areas that are relatively flat and accessible.
Remember to be careful when working around the engine; it's hot when it's recently been running.