2019 Toyota Camry — Serpentine Belt Routing & Length

This page is for general informational purposes only. Part numbers and procedures may vary depending on your vehicle's specific options. Always verify part numbers with your parts supplier and consult a factory repair manual before attempting any repairs.

This guide covers the serpentine belt and related components for the 2019 Toyota Camry, which is equipped with either the 2.5L 4-cylinder (A25A-FKS) or the 3.5L V6 (2GR-FKS) engine.

Quick Answer

For the 2.5L 4-Cylinder Engine:

• Belt Length & Part Number: Approximately 96.6 inches. 6-rib design.
  • OEM Part Number: Toyota 90916-02759
  • Aftermarket Cross-References: Gates K060966, Dayco 5060965, Continental 4060965
• Auto-Tensioner Assembly Part Number: Toyota 16620-25011
• Idler Pulley Part Number: Toyota 16603-25010

For the 3.5L V6 Engine:

• Belt Length & Part Number: Approximately 75.5 inches. 6-rib design.
  • OEM Part Number: Toyota 90916-A2022
  • Aftermarket Cross-References: Gates K060755, Dayco 5060755, Continental 4060755
• Auto-Tensioner Assembly Part Number: Toyota 16620-31052
• Idler Pulley Part Number: The primary idler is integrated into the tensioner assembly on most V6 models.

Belt Routing

Before you remove the old belt, it is critical to photograph the existing belt path from several angles. This will be your best guide for installing the new belt correctly. Do not rely on memory alone.

While the exact component locations vary slightly between the 2.5L and 3.5L engines, the general path is as follows:

1. Starts at the main crankshaft pulley at the bottom of the engine.
2. Wraps around the A/C compressor pulley.
3. Goes around the smooth idler pulley.
4. Routes to the alternator pulley at the top of the engine.
5. Crosses over to the power steering pump (if equipped, otherwise this may be another accessory or idler).
6. Drives the water pump pulley.
7. Finally, loops around the spring-loaded auto-tensioner pulley, which maintains proper belt tension.

When routing the new belt, ensure the ribbed side of the belt makes contact with all grooved pulleys (crank, A/C, alternator, etc.) and the smooth back side of the belt contacts any smooth pulleys (idler, tensioner).

How to Replace the Serpentine Belt

Replacing the serpentine belt is a common DIY task that requires a basic tool.

• Tool Required: A serpentine belt tool kit or a long-handled 3/8" drive breaker bar.

1. Locate the Auto-Tensioner: Find the spring-loaded tensioner assembly. It will have a square 3/8" drive hole or a protruding hex bolt on the pulley arm.
2. Release Tension: Insert your breaker bar or serpentine belt tool into the designated spot on the tensioner. Rotate the tensioner firmly but smoothly in the direction that loosens the belt. You will feel the spring resistance.
3. Remove Old Belt: Once the tension is released, use your other hand to carefully slip the old belt off the alternator or another easily accessible pulley.
4. Install New Belt: Referring to your photograph, carefully route the new belt around all pulleys EXCEPT for the tensioner (or another smooth, easy-access pulley). Double-check that all ribs are properly seated in the grooves of each pulley.
5. Apply Tension: Rotate the tensioner again, slip the belt over the final pulley, and then slowly and carefully release the pressure on the breaker bar, allowing the tensioner to apply pressure to the new belt.
6. Final Check: Visually inspect the entire path of the belt one last time to ensure it is correctly routed and seated on all pulleys. Start the engine and listen for any unusual noises and check that the belt is tracking correctly.

Replacement Interval

Toyota does not specify a strict mileage or time interval for replacing the serpentine belt; it is an "inspect and replace as needed" item during routine service. However, as a general guideline, most ASE-certified technicians recommend proactively replacing the serpentine belt every 60,000 to 90,000 miles to prevent an unexpected failure.

Signs of a Failing Belt or Tensioner

Your belt and its related components will give you warning signs before a catastrophic failure. Look out for:

• Squealing or Chirping Noises: A high-pitched squeal upon startup or during operation often points to a worn or glazed belt.
• Visible Wear: Inspect the belt for cracks, fraying, missing ribs, or glossy/glazed-looking surfaces.
• Grinding or Rattling: A grinding or rattling sound from the front of the engine could indicate a failing bearing in the tensioner or idler pulley.
• Tensioner Wobble: The tensioner arm should be steady while the engine is running. If it is jumping erratically or the pulley is wobbling, the tensioner spring is weak or the pulley bearing is worn.
• Accessory Malfunctions: If the belt fails completely, you will experience an immediate loss of power to the alternator (battery light will illuminate), water pump (engine will overheat), and A/C compressor.

If you're not comfortable performing this service yourself, let us help. Find a trusted shop on Repairius.