Serpentine Belts
Axle Assembly
Differential Assembly
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Power Your INFINITI's Accessories with Serpentine Belts
You might overlook some of your vehicle's smaller components, but they can significantly impact your driving experience and health. Serpentine belts drive multiple accessories from a single continuous belt. These components power your alternator, water pump, air conditioning compressor, and other systems. One belt failure disables several critical functions simultaneously.
Serpentine Belt Design
The serpentine belt follows a winding path around multiple pulleys using a spring-loaded tensioner for proper tightness. Ribs on the belt's inner surface mesh with grooved pulleys. This design efficiently transfers power to accessories while occupying minimal space. The Q50 and QX60 feature complex serpentine belt routing that requires professional attention.
Failure Mechanisms
Serpentine belts crack from repeated flexing around pulleys. Contamination from coolant or oil deteriorates rubber quickly. Worn tensioners fail to maintain proper belt tension, causing slippage. Misaligned pulleys create edge wear and premature failure. Cheap aftermarket belts lack the strength and flexibility genuine INFINITI belts provide. We stock quality alternators that work perfectly with genuine serpentine belts.
Replacement Timing
Replace serpentine belts every 50,000 to 100,000 miles depending on your driving conditions. Squealing noises during acceleration signal worn or loose belts. Visible cracks, missing ribs, or shiny glazed surfaces require immediate replacement. If your battery light illuminates or air conditioning stops working, check the serpentine belt first. Carry a spare belt in your QX60 or Q50 during long trips for emergency situations.
Experience why Coulter INFINITI stands out among online auto supply retailers.