Prevent crank pulley damage and improve belt tension stability with the ALTA Adjustable Tensioner Stop. Designed for R53 MINI Cooper S, JCW, and Convertible models, this device replaces the factory dampener or tensioner stop and provides a durable, adjustable stop that protects your engine from costly failures while maintaining OEM performance.
Key Features:
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Limits travel of the factory belt tensioner arm to prevent damage when the serpentine belt fails
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Adds more tension than the OEM dampener to reduce belt bounce and improve response under high loads
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Adjustable design – secures around both ends of the tensioner dampener without removing the tensioner assembly
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Simple installation: motor slightly raised, bolt-on hardware, approximately 30 minutes
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Durable black finish
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Backed by ALTA’s 5‑year warranty against defects in material and workmanship
Vehicle Fitment:
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2002–2006 MINI Cooper S (R53)
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2002–2008 MINI Cooper S Convertible (R52)
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2002–2006 MINI Cooper S JCW
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2006 MINI Cooper S GP
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2002–2006 MINI Cooper
What’s Included:
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ALTA Adjustable Tensioner Stop (Black)
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Installation hardware
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Instructions
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Warranty documentation
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ALTA stickers