Dorman Automatic Belt Tensioners

4.43 out of 5 stars 42 Customer Reviews

Put some tension on your belts with Dorman automatic belt tensioners. Rigorously tested for sustained performance by a team of product and quality engineers, Dorman

Put some tension on your belts with Dorman automatic belt tensioners. Rigorously tested for sustained performance by a team of product and quality engineers, Dorman's automatic belt tensioner assemblies are designed to provide proper tension to vehicle serpentine belts. They incorporate a damping design, torsion spring, and sealing system to ensure the proper functioning of many integral engine components. Replace worn-out or weak parts with Dorman automatic belt tensioners. The automatic belt tensioner should be replaced whenever the serpentine belt is replaced.

Features include:

* Quality tests include torque

Showing In Stock Items. Show All 42 Items.

Results 1 - 25 of 36

Dorman Automatic Belt Tensioners 419-201

Automatic Belt Tensioner, Smooth Pulley, Ford, Mazda, Mercury, Each

Part Number: RNB-419-201

4.43 out of 5 stars ( 7 )

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Dorman Automatic Belt Tensioners 419-039

Automatic Belt Tensioner, Smooth Pulley, Serpentine, Dodge, Ram, Truck, Each

Part Number: RNB-419-039

Not Yet Reviewed

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Dorman Automatic Belt Tensioners 419-112

Automatic Belt Tensioner, 6-Rib Pulley, Buick, Cadillac, Chevy, GMC, Hummer, Isuzu, Saab, Each

Part Number: RNB-419-112

5.0 out of 5 stars ( 2 )

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Dorman Automatic Belt Tensioners 419-109

Automatic Belt Tensioner, Smooth Pulley, Buick, Cadillac, Chevy, GMC, Hummer, Saab, Each

Part Number: RNB-419-109

4.5 out of 5 stars ( 4 )

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Dorman Automatic Belt Tensioners 419-011

Automatic Belt Tensioner, Ford, Lincoln, Mercury, Each

Part Number: RNB-419-011

Not Yet Reviewed

Estimated Ship Date: Jan 28, 2026 if ordered today

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Estimated Ship Date: Jan 28, 2026 if ordered today

Dorman Automatic Belt Tensioners 419-006

Automatic Belt Tensioner, Smooth Pulley, Dodge, Ram, Jeep, Chrysler, Each

Part Number: RNB-419-006

Not Yet Reviewed

Estimated Ship Date: Jan 27, 2026 if ordered today

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Estimated Ship Date: Jan 27, 2026 if ordered today

Dorman Automatic Belt Tensioners 419-022

Automatic Belt Tensioner, Smooth Pulley, Scion, Toyota, Each

Part Number: RNB-419-022

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Jan 27, 2026 if ordered today

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Estimated Ship Date: Jan 27, 2026 if ordered today

Dorman Automatic Belt Tensioners 419-400

Automatic Belt Tensioner

Part Number: RNB-419-400

Not Yet Reviewed

Estimated Ship Date: Jan 27, 2026 if ordered today

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Estimated Ship Date: Jan 27, 2026 if ordered today

Dorman Automatic Belt Tensioners 419-317

Automatic Belt Tensioner, Smooth Pulley, Chevy, Pontiac, Each

Part Number: RNB-419-317

Not Yet Reviewed

Estimated Ship Date: Jan 27, 2026 if ordered today

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Estimated Ship Date: Jan 27, 2026 if ordered today

Dorman Automatic Belt Tensioners 419-008

Automatic Belt Tensioner, Chrysler, Dodge, Jeep, 4.7L, Each

Part Number: RNB-419-008

Not Yet Reviewed

Estimated Ship Date: Jan 27, 2026 if ordered today

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Estimated Ship Date: Jan 27, 2026 if ordered today

Dorman Automatic Belt Tensioners 419-125

Automatic Belt Tensioner (Tensioner Only)

Part Number: RNB-419-125

Not Yet Reviewed

Estimated Ship Date: Jan 27, 2026 if ordered today

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Estimated Ship Date: Jan 27, 2026 if ordered today

Dorman Automatic Belt Tensioners for 2006-2007 ACCORD, 2002-2014 CR-V, 2006 TSX - 419-005

Automatic Belt Tensioner, Smooth Pulley, for use on Honda®, Each

Part Number: RNB-419-005

Not Yet Reviewed

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Dorman Automatic Belt Tensioners for 2000-2005 CELICA, 2003-2006 COROLLA, 2003-2010 VIBE - 419-123

Automatic Belt Tensioner (Tensioner only)

Part Number: RNB-419-123

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Dorman Automatic Belt Tensioners 419-122

Automatic Belt Tensioner (Tensioner Only)

Part Number: RNB-419-122

Not Yet Reviewed

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Dorman Automatic Belt Tensioners 419-023