Why Should I Replace My Serpentine Belt Tensioner? Customers may want to consider replacing the serpentine belt tensioner when performing VW Golf timing belt service. The serpentine belt tensioner is easily accessible during the timing belt service and replacement during this time will save labor costs. Many times the bearing in the pulley will unexpectedly fail due to age and higher mileage. Also in some cases the tension spring or damper part of the tensioner can become weak giving the serpentine belt insufficient belt tension. We have seen serpentine belt tensioner failure as early 70,000 miles.
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