One belt.
The 2002 4Runner, typically equipped with the 3.4-liter V6 (5VZ-FE), uses a single serpentine belt to drive all engine accessories such as the alternator, power steering pump, and air conditioning compressor. The engine’s timing is maintained by a timing chain, not a belt.
Belt configuration in the 2002 4Runner
Here is how the belt system is arranged in this model year. The following points summarize the belt setup and what powers it.
- The accessory drive uses one serpentine belt that powers the alternator, power steering pump, A/C compressor, and water pump.
- The engine timing is controlled by a timing chain, so there is no separate timing belt to replace.
- Because there is only one belt in the accessory drive, routine inspection focuses on the serpentine belt and the belt tensioner rather than timing belt maintenance.
In short, the 2002 4Runner has one belt in its accessory drive, plus a timing chain for engine timing.
What this means for owners
One belt simplifies maintenance compared to engines that require a timing belt. Owners should routinely inspect the serpentine belt for cracks or wear and ensure the tensioner is functioning correctly. Since timing is handled by a chain, there is no scheduled timing belt replacement.
Summary
The 2002 Toyota 4Runner typically has a single serpentine belt for accessory drives, while the engine timing is managed by a chain. This configuration means belt-related maintenance focuses on the serpentine belt and tensioner, with no separate timing belt service required.