2015 Honda CR-V Serpentine Belt Routing, Length & Part Numbers

The 2015 Honda CR-V features Honda's 2.4-liter "Earth Dreams" 4-cylinder engine (K24W9). Because this generation of the CR-V utilizes Electric Power Steering (EPS), the serpentine belt system is simpler than older models—there is no power steering pump to drive. If you are experiencing squealing noises, poor alternator output, or if your CR-V has surpassed 100,000 miles, it is likely time to replace the serpentine belt and inspect the auto-tensioner.

Here is your comprehensive, ASE-certified guide to replacing the serpentine belt on a 2015 Honda CR-V.

Quick Answer

For the 2015 Honda CR-V (2.4L 4-cylinder):

• Belt Length: 44.1 inches (1120 mm)
• Rib Count: 6-rib
• OEM Belt Part Number: Honda 31110-5A2-A01 (Manufactured by Bando)
• Aftermarket Cross-References: Gates K060441, Dayco 5060441, Continental Elite 4060440, Bando 6PK1120
• Auto-Tensioner Part Number: Honda 31170-5A2-A03 (Gates 39396)
• Idler Pulley Part Number: Note: The 2015 CR-V 2.4L does not use a standalone idler pulley; the pulley is integrated into the auto-tensioner assembly.

Belt Routing

Pro-Tip: Always take a clear photograph of your existing serpentine belt routing before removing the old belt. It serves as a perfect reference if you lose your place.

Because the 2015 CR-V utilizes EPS, the routing is relatively compact. Ensure the 6-rib belt is seated perfectly in the grooves of the ribbed pulleys and flat against the smooth tensioner pulley.

Text-Based Routing Path:

1. Start by looping the belt around the bottom of the Crankshaft Pulley (the large pulley at the bottom of the engine).
2. Route the belt straight across to the front of the vehicle, wrapping it under and around the A/C Compressor Pulley.
3. Bring the belt straight up from the A/C compressor to the Alternator Pulley at the top front of the engine block.
4. Route the belt across the top of the alternator and down around the Water Pump Pulley.
5. Finally, bring the back (smooth side) of the belt across the Auto-Tensioner Pulley before it returns down to the Crankshaft Pulley.

How to Replace the Serpentine Belt

Replacing the belt on a 2015 CR-V is a straightforward maintenance task that most DIYers can tackle in under 30 minutes.

Required Tools:

• 14mm wrench or socket (for the tensioner)
• A dedicated serpentine belt tool or a long 3/8" drive breaker bar (for leverage)

Step-by-Step:

1. Locate the auto-tensioner on the passenger side of the engine. The tensioner bolt head is 14mm.
2. Place your 14mm wrench or serpentine belt tool onto the tensioner pulley bolt.
3. Slowly push the wrench toward the rear of the vehicle (counter-clockwise) to relieve the spring tension on the belt.
4. While holding the tensioner back, slide the old belt off the easiest accessible pulley (usually the alternator or water pump).
5. Slowly release the tensioner back to its resting position. Do not let it snap back, as this can damage the internal spring.
6. Remove the old belt from the engine bay.
7. Route the new belt following the path described above, leaving the smooth tensioner pulley for last.
8. Compress the tensioner again, slip the belt over the tensioner pulley, and carefully release the tensioner so it applies pressure to the new belt.
9. Inspect all pulleys with a flashlight to ensure the belt ribs are perfectly seated in the grooves.
10. Start the engine and observe the belt for proper alignment and smooth operation.

Replacement Interval

Honda does not specify a strict mileage interval for the serpentine belt, but rather includes it as part of the "Maintenance Minder" system inspections. However, industry best practices dictate that modern EPDM serpentine belts should be strictly inspected at 60,000 miles and proactively replaced between 90,000 and 100,000 miles. If you are replacing the belt at the 100k mark, it is highly recommended to replace the auto-tensioner assembly at the same time, as the internal spring fatigues over time.

Signs of a Failing Belt or Tensioner

Do not wait for a complete belt failure, which will instantly cause a loss of alternator charging, water pump circulation (leading to overheating), and A/C function. Watch for these symptoms:

• Squealing or Chirping Noises: Especially prevalent on cold startups or when the A/C compressor engages.
• Visible Wear: Look for missing ribs, deep cracking, or a shiny, glazed appearance on the ribbed side of the belt. (Note: Modern EPDM belts rarely crack like older neoprene belts; they wear down like tire tread. Use a belt wear gauge if unsure).
• Tensioner Bounce: With the engine running, observe the auto-tensioner. A small amount of vibration is normal, but excessive jumping or bouncing indicates a weak tensioner spring.
• Rust Bleeding: If you see a rust-colored dust around the tensioner pivot point, the internal bearing or spring is failing.

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