2003 Toyota 4Runner Towing Capacity

Trim	Braked Towing Capacity
SR5 V6 4x2	2,273kg / 5,011lb~
SR5 V8 4x2	2,273kg / 5,011lb~
SR5 Sport V6 4x2	2,273kg / 5,011lb~
SR5 Sport V8 4x2	2,273kg / 5,011lb~
Limited V8 4x2	2,273kg / 5,011lb~
SR5 V6 4x4	2,273kg / 5,011lb~
SR5 V8 4x4	2,273kg / 5,011lb~
SR5 Sport V6 4x4	2,273kg / 5,011lb~
Limited V6 4x4	2,273kg / 5,011lb~
Limited V8 4x4	2,273kg / 5,011lb~

How much can the 2003 Toyota 4Runner tow?

As you can see from the table of towing capacity readings above, all of the trims that are mentioned can tow a braked trailer up to 2273kg (or 5,011lb~).

What does braked towing capacity mean?

When the manufacturer states that a towing capacity is "braked" they are referring to brakes being fitted to the trailer that the car is towing.

At least one of the axles on the trailer that the vehicle is towing must have brakes fitted and controlled by the car if they describe the capacity as "braked".