The serpentine belt tensioner applies pressure to the serpentine belt, maintaining best tension to drive the accessories like the alternator and A/C compressor. The service life of the belt tensioner is the same as the belt itself, so they should always be replaced together. A worn tensioner prohibits the accessories from spinning properly, leading to premature wear and noise.
Your auto maker has a recommended mileage interval for serpentine belt replacement. A complete accessory drive system service replaces the serpentine belt, the belt tensioner and any idler pulleys your automobile might have. Your kind and professional Kennedy Transmission Brake & Auto Service service advisor can inspect your system and let you know if it’s time for a replacement.
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