Dayco Automatic Belt Tensioner Assembly

The Dayco Automatic Belt Tensioner Assembly (also called a drive belt tensioner or serpentine belt tensioner) keeps the correct tension on the accessory drive belt. This helps the alternator, power steering pump, water pump, and A/C compressor turn reliably under changing engine loads.

Key Features:

• Spring-loaded design automatically adjusts for belt stretch and wear, so no manual adjustment is needed
• Built-in damping helps control belt vibration and reduce belt flutter and noise
• Precision pulley and bearing assembly supports smooth, quiet operation and long service life
• Designed to meet or exceed original equipment specifications for fit and performance
• Supplied as a complete assembly for straightforward installation

Why Replace It: A worn tensioner can cause belt slip, squealing, premature belt wear, and loss of accessory function. Replacing the tensioner along with the drive belt helps restore proper belt tension and avoids repeat repairs.

Dayco is a long-established supplier of belts, tensioners, and engine drive components to OE manufacturers and the aftermarket. Choose the correct part number for your application from the available options.