Where is the oil filter located on a 1990 Toyota Corolla four-door sedan?

On a 1990 Toyota Corolla four-door sedan, the oil filter is typically located on the passenger side of the engine, near the bottom. It's usually fairly accessible, but you might need to consult a repair manual or look at pictures online specific to that year and model to get the exact location and orientation. It's often a spin-on type filter.