Engine · important priority
Belt Tensioner Replacement Cost & Pricing
Replace a worn or seized serpentine belt tensioner pulley that maintains proper belt tension. A failing tensioner causes belt squealing, slipping, and premature belt wear.
Typical Belt Tensioner Replacement cost
$105–$350, with an average estimate of $200 before vehicle-specific adjustments.
What to expect
Difficulty: easy. Typical labor time: 0.5–2 hours.
Mechanic's tip
Replace the tensioner whenever you replace the serpentine belt — they wear at similar rates and labor is already paid for. A chirping or squealing belt that returns after a new belt is installed almost always means the tensioner or an idler pulley is bad, not the belt itself. Spin each pulley by hand to check for roughness or wobble.