Two belts: a timing belt and a serpentine belt. The 3rd generation Toyota 4Runner (1995–2002) with the 5VZ-FE 3.4L V6 uses a timing belt to drive the camshafts (and typically the water pump), plus a single serpentine belt to run the accessories like the alternator, power steering, and A/C.
Understanding this layout helps owners anticipate service needs, since timing belts require careful replacement planning and can be more consequential than other belts. The following sections break down what each belt does and typical maintenance guidance for this generation.
Belt types and what they do
Timing belt
The timing belt synchronizes the camshafts with the crankshaft, controlling valve timing. On the 3rd-gen 4Runner’s 5VZ-FE engine, this belt is a critical wear item. Replacement is typically recommended around 90,000 miles (about 145,000 km) per Toyota’s service schedule. A failure can cause severe engine damage, so timely replacement is essential.
Serpentine belt
The serpentine belt (accessory belt) drives the alternator, A/C compressor, power steering pump, and other accessories. This belt is generally inspected for cracks and wear and is commonly replaced around 60,000–100,000 miles, depending on wear and driving conditions.
Belts at a glance:
- Timing belt: drives the camshafts and, in this engine family, the belt path may also incorporate the water pump.
- Serpentine belt: drives accessory components such as the alternator, A/C, and power steering.
Concluding: For the 3rd-gen 4Runner, there are two belts in the belt drive system—one timing belt and one serpentine belt. Proper inspection and replacement of both are important for reliable operation and to avoid catastrophic engine damage.
Maintenance intervals (typical guidance)
Before listing the maintenance guidelines, note that exact intervals can vary by model year and maintenance history. The ranges below reflect common recommendations for the 5VZ-FE engine in 3rd-gen 4Runners:
- Timing belt: replace around 90,000 miles (145,000 km).
- Serpentine belt: inspect at around 60,000 miles and replace around 90,000 miles or when wear is evident.
Concluding: following these intervals—or your dealer’s official schedule—helps prevent belt-driven failures and preserves timing integrity and accessory function.
Summary
In sum, a 3rd generation 4Runner uses two belts: a timing belt and a serpentine belt. The timing belt is a critical service item with a typical replacement around 90,000 miles, while the serpentine belt is inspected regularly and replaced as needed, commonly around 60,000–100,000 miles depending on wear. Regular maintenance ensures the longevity and reliability of this classic SUV.