Vaico V25-0446 Accessory Drive Belt Tensioner Assembly

Accessory Drive Belt Tensioner for Mazda 3 and 5

Vaico V25-0446 is an accessory drive belt tensioner assembly for the Mazda 3, Mazda 3 Sport, and Mazda 5 applications listed below. It uses a mechanical operating mode and a 6-rib design to maintain proper belt tension in the accessory drive belt system.

Key Features

• Part number: V25-0446
• Accessory drive belt tensioner assembly for belt system service
• Mechanical operating mode
• 6-rib configuration
• 72.5 mm outer diameter and 72.5 mm width
• 31 mm height and 29 mm thickness
• Weight: 0.910 kg
• VAICO product line for belt and cooling system components

Detailed Description

Vaico V25-0446 is built for accessory drive belt tensioner service where stable belt control is needed in the Mazda 3, Mazda 3 Sport, and Mazda 5. The mechanical design and 6-rib profile support proper belt tracking across the accessory drive belt system, while the compact 72.5 mm diameter and matching width help it align with the specified application. This part cross-references 1 251 661 and 3M5Q6A228AB for the same application.

VAICO focuses on replacement components for belts and cooling systems, and this tensioner assembly follows the dimensional and fitment requirements shown for the listed Mazda applications. V25-0446 is a direct-fit service part for vehicles that use the specified ribbed belt setup.

Vehicle Fitment

• Fits 2004-2011 Mazda 3, N/A
• Fits 2012 Mazda 3, N/A; Grade: Aftermarket; Description: Ribbed V-Belt; To 09/01/2012; VAICO
• Fits 2013 Mazda 3, N/A; Aftermarket ribbed V-Belt for Accessory Drive Belt Idler Pulley; VAICO
• Fits 2009-2010 Mazda 3 Sport, N/A; Aftermarket ribbed V-Belt for Accessory Drive Belt Idler Pulley; VAICO
• Fits 2012 Mazda 3 Sport, N/A; Grade: Aftermarket; Description: Ribbed V-Belt; To 09/01/2012; VAICO
• Fits 2013 Mazda 3 Sport, N/A; Aftermarket ribbed V-Belt for Accessory Drive Belt Idler Pulley; VAICO
• Fits 2006-2010 Mazda 5, N/A; Aftermarket ribbed V-Belt for Accessory Drive Belt Idler Pulley; VAICO

Common Issues This Part Can Address

• Loss of proper accessory belt tension
• Belt noise caused by a worn tensioner assembly
• Uneven belt tracking in the accessory drive system
• Service replacement for a worn Mazda 3 or Mazda 5 tensioner
• Restoration of stable belt control in ribbed belt applications

Installation Notes and Tips

Confirm the belt routing, rib count, and tensioner dimensions before installation. Compare the removed part to V25-0446 and verify the vehicle build date where noted for 2012 Mazda 3 and Mazda 3 Sport applications. Inspect the accessory belt, idler pulleys, and related drive components during service so the new tensioner operates against a clean, properly aligned belt path.

Quality Assurance

Vaico supplies replacement parts for European and Asian vehicle service applications, including belt and cooling system components. V25-0446 is specified with defined dimensions, operating mode, and fitment coverage for the listed Mazda models.