2025 Toyota Camry Serpentine Belt Routing, Length & Replacement Guide

As an ASE-certified master technician, I regularly field questions about drive belt maintenance. If you are looking for the serpentine belt routing, length, and part numbers for the Toyota Camry, you are in the right place.

Technician’s Note: For the 2025 model year, Toyota transitioned the US-market Camry to an exclusively hybrid powertrain (THS II), meaning the A/C, water pump, and power steering are entirely electric, and there is no traditional serpentine belt. However, if you are servicing a 2025 Camry in an international market with the traditional 2.5L non-hybrid engine, or performing an engine swap/service on a standard 2.5L platform, the following specifications apply.

Quick answer

Here is the essential information you need before heading to the parts counter or popping the hood:

• Belt Length: 48.5 inches (varies slightly by aftermarket brand)
• Rib Count: 6-rib
• OEM Belt Part Number: 90916-02739
• Aftermarket Cross-References: Gates K060485, Dayco 5060485, Continental Elite 4060485
• Auto-Tensioner Part Number: 16620-F0010
• Idler Pulley Part Number: 16603-F0010

Belt routing

Because modern engine bays are incredibly tight, always take a clear photograph of your existing belt with your smartphone before you attempt removal. This ensures you have a personalized reference for your exact trim and accessory package.

For a standard fully-accessorized layout, the 6-rib serpentine belt routing order is as follows:

1. Start by looping the belt down around the bottom of the Crankshaft Pulley (the large pulley at the bottom center of the engine).
2. Route the belt straight up and over the top of the A/C Compressor.
3. Pull the belt down and under the smooth Idler Pulley.
4. Bring it up and around the Alternator pulley.
5. Route it across and over the Power Steering Pump (on equipped models).
6. Bring it down and wrap it under the Water Pump pulley.
7. Finally, pull the remaining slack over the Auto-Tensioner Pulley to complete the loop.

How to replace the serpentine belt

Replacing the serpentine belt on a standard Camry engine layout is a straightforward procedure if you have the right tools.

1. Locate the tensioner: Find the automatic drive belt tensioner on the passenger side of the engine block.
2. Release the tension: Using a specialized serpentine belt tool or a long-handled 3/8" drive breaker bar, insert the drive into the square slot on the tensioner arm (or use the appropriate metric socket on the tensioner pulley bolt). Rotate the tensioner counter-clockwise to relieve the pressure on the belt.
3. Remove the old belt: While holding the tensioner open, slip the belt off the easiest accessible pulley (usually the alternator or idler pulley). Gently release the tensioner arm back to its resting position.
4. Install the new belt: Route the new belt following the sequence outlined above (Crank → A/C → Idler → Alternator → PS → Water Pump). Leave the tensioner pulley for last.
5. Apply tension: Rotate the tensioner open again, slip the final loop of the belt over the tensioner pulley, and carefully release the tensioner to apply pressure to the belt.
6. Verify: Double-check that all ribs are perfectly seated within the grooves of the ribbed pulleys and flat against the smooth pulleys.

Replacement interval

For standard drive belts, the factory recommendation is to perform a visual inspection starting at 60,000 miles. Under normal driving conditions, the serpentine belt should be replaced every 90,000 to 100,000 miles. However, if you live in extremely hot or cold climates, the rubber compound can degrade faster, necessitating a replacement closer to the 75,000-mile mark.

Signs of a failing belt or tensioner

Do not wait for your belt to snap on the highway. Look out for these common warning signs:

• Squealing or Chirping Sounds: A high-pitched squeal upon startup or acceleration usually indicates a stretched belt, a worn tensioner spring, or a failing bearing in the idler pulley.
• Visible Cracks or Fraying: Modern EPDM belts do not crack as obviously as older neoprene belts, but any missing chunks of ribs, exposed cords, or deep lateral cracks mean the belt is compromised.
• Accessory Failure: If your power steering suddenly feels incredibly heavy, your A/C starts blowing warm air, or your battery warning light illuminates, your belt has likely snapped or slipped off entirely.
• Tensioner "Chatter": If the automatic tensioner arm bounces rapidly while the engine is idling, the internal damping spring has failed and the assembly must be replaced alongside the belt.

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