2015 Toyota Tundra Serpentine Belt: Routing & Replacement Guide

Quick Answer

For your 2015 Toyota Tundra, the serpentine belt system keeps all your engine accessories running smoothly. Here’s a quick overview of key specifications and parts:

• Belt Length: Approximately 98.7 inches (2508 mm)
• Rib Count: 6-rib
• OEM Belt PN: 90916-A2002
• Aftermarket Cross-References:
  • Gates K060987
  • Dayco 5060987
  • Continental Elite 4060987
• Auto-Tensioner PN: 16620-0S010
• Idler Pulley PN: 16603-0S010

(Note: Always verify part numbers with your VIN for exact fitment, as variations can occur based on specific engine options.)

Belt Routing

The serpentine belt on your 2015 Toyota Tundra (typically with the 5.7L V8 engine) snakes its way around several pulleys, transferring power from the crankshaft to vital accessories. Before you begin any removal, always take a clear photo of your current belt routing! This will be your best guide for reinstallation.

Here’s a common routing path for the 5.7L V8:

1. Starting from the Crankshaft Pulley (the largest, lowest pulley), the belt typically travels up and to the left.
2. It then wraps under the A/C Compressor Pulley.
3. From the A/C compressor, it goes up and over the top of the Idler Pulley (a smooth, flat pulley).
4. Next, it travels down to wrap under the Alternator Pulley.
5. From the alternator, the belt moves across to wrap over the Power Steering Pump Pulley.
6. It then goes down to wrap under the Water Pump Pulley.
7. Finally, it completes the loop by wrapping over the Automatic Belt Tensioner Pulley (often located towards the passenger side, distinguishable by its arm and spring mechanism).

This description is a common routing for the 5.7L V8. If your Tundra has a different engine (e.g., the 4.6L V8), the exact path might vary slightly, reinforcing the importance of photographing your specific setup.

How to Replace the Serpentine Belt

Replacing the serpentine belt on your 2015 Tundra is a manageable DIY task, but requires the right tools and caution.

1. Safety First: Ensure the engine is off and cool. Disconnect the negative battery terminal to prevent accidental starting.
2. Locate the Tensioner: Identify the automatic belt tensioner. It will have a square opening (usually 3/8" or 1/2") in its arm.
3. Release Tension: Insert a serpentine belt tool or a long 3/8" (or 1/2") breaker bar into the square opening of the tensioner. Apply steady, downward (or sometimes upward, depending on the tensioner design) pressure to rotate the tensioner arm and relieve tension from the belt. Hold the tensioner firmly in this position.
4. Remove Old Belt: While holding the tensioner open, carefully slip the belt off one or more of the pulleys. Once it