Determining the exact belt fit for your 2005 Nissan Altima requires matching the specific engine under the hood. Nissan offered two distinct engines for this model year, each requiring a different serpentine (accessory drive) belt:
Match Your 2005 Altima Engine
The critical factor is your Altima's engine size:
- 2.5L QR25DE 4-Cylinder Engine: This is the standard engine for most 2005 Altimas (2.5 S and some 3.5 SE models before the 3.5L option became prevalent). It requires a 6-rib serpentine belt.
- 3.5L VQ35DE V6 Engine: Found in the 2005 Altima 3.5 SE and SL trims. This engine requires a 7-rib serpentine belt.
Standard Belt Sizes & OEM Numbers
These are the original Nissan part numbers and approximate lengths for reference. Always verify the exact part for your specific vehicle using your VIN or the physical belt routing diagram under the hood.
- For 2.5L 4-Cylinder (6-Rib):
- OEM Part Number: 11720-5S700
- Approximate Length: ~59.5 inches (1510 mm)
- Rib Count: 6 ribs
- For 3.5L V6 (7-Rib):
- OEM Part Number: K060755 (Note: Aftermarket numbers like 6K755 or K060755 are common equivalents)
- OEM Equivalent Length Reference: Belt length corresponds to ~75.5 inches (1920 mm)
- Rib Count: 7 ribs
Key Takeaways for Perfect Fit
- Identify Engine First: Pop the hood and confirm your engine size (2.5L or 3.5L) - it's stamped clearly on the engine.
- Cross-Reference by VIN: Provide your Vehicle Identification Number when purchasing. Dealerships and major auto parts retailers use this for the definitive match.
- Bring the Old Belt: If replacing yourself, take the old belt to compare rib count (6 vs 7) and length exactly. Note any identifying numbers.
- Use Authorized Lookup Tools: Rely on the in-store or online parts lookup tool of reputable retailers, ensuring you input your exact year, make, model, and trim (e.g., 2005 Nissan Altima 2.5 S or 2005 Nissan Altima 3.5 SL).
Never guess based solely on model year. Confirming the engine size is essential to get the correct serpentine belt for your 2005 Nissan Altima and avoid breakdowns.