2025 Ram ProMaster Serpentine Belt Guide

Quick Answer

• Belt Length: 90.0 inches (2286mm)
• Rib Count: 6-rib
• OEM Belt Part Number: 68102315AA
• Aftermarket Cross-References:
  • Gates: K060900
  • Dayco: 5060900
  • Continental Elite: 4060900
• Auto-Tensioner Part Number: 4893444AD
• Idler Pulley Part Number: 4861658AA

Belt Routing

Before removing the old belt, we strongly recommend taking a clear photograph of the current belt routing to ensure proper installation of the new one. The 2025 Ram ProMaster with the 3.6L V6 follows this serpentine belt path:

1. Crankshaft Pulley (the largest pulley, at the bottom of the engine)
2. A/C Compressor (typically on the lower passenger side)
3. Idler Pulley (a smooth, non-driven pulley that guides the belt)
4. Alternator (usually located on the upper passenger side)
5. Power Steering Pump (if equipped, typically on the upper driver's side)
6. Water Pump (mounted to the engine block, often centrally)
7. Tensioner (a spring-loaded pulley that maintains belt tension)

How to Replace the Serpentine Belt

Replacing the serpentine belt on a 2025 Ram ProMaster is a manageable task with the right tools. You'll need a serpentine belt tool or a long-handled 3/8" breaker bar to release the tension on the belt.

1. Locate the Tensioner: The automatic tensioner has a 3/8" square hole where you will insert your tool.
2. Release Tension: Using your serpentine belt tool or breaker bar, rotate the tensioner to loosen the belt. This will allow you to slip the belt off one of the pulleys.
3. Remove the Old Belt: Carefully remove the old belt, paying attention to the routing.
4. Install the New Belt: Following the routing path you photographed earlier, thread the new belt around the pulleys, saving the tensioner for last.
5. Apply Tension: Release the tensioner slowly to apply pressure to the new belt, ensuring it is properly seated in the grooves of each pulley.

Replacement Interval

We recommend inspecting the serpentine belt during every oil change and replacing it every 60,000 to 90,000 miles, or as recommended in your owner's manual. Environmental factors like extreme heat can shorten the belt's lifespan.

Signs of a Failing Belt or Tensioner

• Squealing or Chirping Noises: This is often the first sign of a worn or misaligned belt.
• Visible Wear: Look for cracks, fraying, or missing ribs on the belt.
• Tensioner Pulley Wobble: A failing tensioner may cause the pulley to wobble or make a grinding noise.
• Accessory Malfunctions: A slipping belt can cause issues with the alternator, power steering, or A/C.

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