2025 Ram 1500 Serpentine Belt Guide

Quick Answer

• Belt Length and Rib Count:
  • 3.6L Pentastar V6: 100.31 inches (2548 mm), 6-rib
  • 3.0L Hurricane I6: 95.8 inches (2433 mm), 7-rib
• OEM and Aftermarket Part Numbers:
  • 3.6L Pentastar V6:
    • OEM Belt: Mopar 5184334AC
    • Aftermarket Belts: Gates K061000, Dayco 5061000, Continental 4061000
    • Tensioner: Mopar 4862694AD
    • Idler Pulley: Mopar 04862734AA
  • 3.0L Hurricane I6:
    • OEM Belt: Mopar 68532223AA
    • Aftermarket Belts: Gates K070951, Dayco 5070951, Continental 4070951
    • Tensioner: Mopar 68532224AA
    • Idler Pulley: Mopar 68532225AA

Belt Routing

Proper serpentine belt routing is critical for the correct operation of your 2025 Ram 1500's engine accessories. Before you remove the old belt, we strongly recommend taking a clear photograph of the belt's path to ensure you can correctly install the new one. The routing differs between the two available engine options.

3.6L Pentastar V6

The serpentine belt on the 3.6L Pentastar V6 winds its way from the crankshaft pulley at the bottom of the engine, up to the A/C compressor, around the idler pulley, down to the alternator, over the power steering pump, around the water pump, and finally back to the tensioner.

3.0L Hurricane I6

For the 3.0L Hurricane I6, the belt path is as follows: from the crankshaft pulley, it moves to the A/C compressor, then to the idler pulley, up to the alternator, around the power steering pump, down to the water pump, and finally, it returns to the tensioner.

How to Replace the Serpentine Belt

To replace the serpentine belt on your 2025 Ram 1500, you will need a serpentine belt tool or a 3/8" breaker bar. Locate the automatic tensioner—it has a square hole that fits the tool. Insert the tool and rotate the tensioner to release the tension on the belt. While holding the tensioner, carefully slip the belt off one of the pulleys. Slowly release the tensioner.

After removing the old belt, it's a good time to inspect the pulleys on the tensioner and idler for any signs of wear or damage. Spin them to ensure they rotate smoothly and quietly. If you notice any roughness or noise, now is the perfect time to replace them.

Route the new belt according to the path you photographed earlier, ensuring the ribbed side of the belt makes contact with the ribbed pulleys and the smooth side contacts the smooth pulleys. Once the belt is routed around all the pulleys except for the tensioner, use your tool to again release the tension and slide the new belt onto the tensioner pulley. Slowly release the tensioner to apply pressure to the new belt. Double-check that the belt is correctly seated on all pulleys before starting the engine.

Replacement Interval

For the 2025 Ram 1500, the recommended serpentine belt replacement interval is every 100,000 miles. However, it is always a good idea to inspect the belt periodically for any signs of wear and tear, especially if you frequently drive in harsh conditions.

Signs of a Failing Belt or Tensioner

Be on the lookout for these signs that your serpentine belt or tensioner may be failing:

• Squealing or Chirping Noises: This is often the first sign of a worn or slipping belt.
• Visible Wear: Look for cracks, fraying, or glazing on the belt.
• Accessory Malfunctions: If your A/C, power steering, or alternator are not working correctly, it could be due to a slipping or broken belt.
• Tensioner Noise or Vibration: A rumbling or grinding noise from the tensioner area can indicate a failing bearing. You may also see the tensioner arm vibrating excessively while the engine is running.

If you notice any of these signs, it's time to inspect your serpentine belt system and replace any worn components.

Find a trusted shop on Repairius to help with your serpentine belt replacement needs.