Top 9 Alternator Belt Tensioner – Automotive Replacement Belt Tensioners

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1. ACDelco


ACDelco 38158 Professional Automatic Belt Tensioner and Pulley Assembly

ACDelco #ad - All products have been designed with the professional in mind. Ensures proper belt tension, alignment, and damping for superior performance. Fit type: Vehicle Specific. Patented vibration damping system increases tensioner, belt, and accessory component life for long lasting use. Constantly modernizing our powerful devices to meet the demands of the modern user. Fully equipped with state-of-the-art technology.
BrandACDelco #ad
ManufacturerACDelco #ad
Height3.6 Inches
Length8.8 Inches
Weight1 Pounds
Width4.8 Inches
Part Number38158
WarrantyLimited Lifetime Warranty (Parts Only). Please see for more details.

2. Dorman


Dorman 917-148 Accessory Drive Belt Idler Pulley Adjustment Bolt Kit for Select Lexus / Toyota Models

Dorman #ad - Durable steel construction. No special tools necessary. Manufactured to strict engineering quality standards. Bolts allows adjustment of Idler Pulleys. Ensure fit – to make sure this part fits your exact vehicle, input your make, model and trim level into the Amazon Garage.
BrandDorman #ad
ManufacturerDorman #ad
Height2.17 Inches
Length1.38 Inches
Weight0.26 Pounds
Width7.09 Inches
Part Number917-148
WarrantyLimited Lifetime Warranty

3. URO Parts


URO Parts 11287549588 Acc. Belt Tensioner w/Pulley, Alternator and Water Pump, Includes NTN/NSK Bearing

URO Parts #ad - High-strength alloy or composite construction withstands engine heat and vibration. Fitted with a high-quality Japanese NTN/NSK bearing for smooth operation and long life. Sealed bearing resists dust and water ingress. Fit type: Vehicle Specific. 24-month / unlimited Mileage Warranty. Guaranteed fitment. Coil spring where applicable matches OE spring rate for proper belt tension at all engine speeds. Manufactured to OE dimensions for proper clearances and belt alignment.
BrandURO Parts #ad
ManufacturerURO Parts #ad
Height3.25 Inches
Length5 Inches
Weight1.55 Pounds
Width3.5 Inches
Part Number11287549588
Warranty1 year manufacturer

4. ACDelco


ACDelco 12577652 GM Original Equipment Water Pump and Alternator Belt Tensioner

ACDelco #ad - Manufactured to gM OE specification for fit, form, and function. Helps keep drive belt at correct tension to help maintain proper function. Offering the quality, reliability, and durability of GM OE. Gm-recommended replacement part for your GM vehicle’s original factory component.
BrandACDelco #ad
ManufacturerACDelco #ad
Height3.6 Inches
Length7 Inches
Weight1.85 Pounds
Width3.7 Inches
Part Number12577652
Warranty24 Month / Unlimited Mile Limited Warranty on parts sold on or after 04/01/18. (Parts Only) Please see for more details.

5. Honda


Honda Genuine 31170-R70-A01 Alternator Bracket Tensioner Assembly

Honda #ad - Fit type: Vehicle Specific. Genuine OEM part. Package weight: 3. 649 pounds. Package dimensions: 32. 766 l x 11. 684 h x 14. 986 w centimeters.
BrandHonda #ad
ManufacturerHonda #ad
Height1 Inches
Length1 Inches
Weight2 Pounds
Width1 Inches
Part Number31170-R70-A01
WarrantyManufacturer Warranty

6. URO Parts


A/C Compressor to Alternator Belt, URO Parts 30650957 Belt Tensioner Assembly

URO Parts #ad - Volvo; a/c compressor to Alternator Belt. Volvo c30 08-13, s40 04, s40 05-11, s40 04, c70 06-13, v50 05-11. Fit type: Vehicle Specific. Package weight: 1. 55 pounds.
BrandURO Parts #ad
ManufacturerAPA Industries #ad
Height3.5 Inches
Length5.5 Inches
Weight1.55 Pounds
Width5 Inches
Part Number30650957
Warranty2 year, unlimited mileage

7. URO Parts


Pulleys, Includes NTN/NSK Bearing, URO Parts 11287515865 Acc. Belt Tensioner Pulley w/Lever, For Water Pump/Alternator Belt, Includes Tensioner, and Base Plate

URO Parts #ad - Fitted with a high-quality japanese ntn/nsk bearing for smooth operation and long life. Manufactured to oe tensioner pulley dimensions for proper clearances and belt alignment. Guaranteed fitment. Includes dust cap. Fit type: Vehicle Specific. High-strength alloy or composite pulley construction withstands brutal engine heat and vibration.
BrandURO Parts #ad
ManufacturerURO Parts #ad
Height4.5 Inches
Length9.5 Inches
Weight2.25 Pounds
Width3.5 Inches
Part Number11287515865
Warranty1 year manufacturer

8. ICT Billet


ICT Billet LS Truck Turbo Alternator Bracket & Belt Tensioner Relocation LSX uses LS1 or Camaro LS3 water pump Compatible with 1999-2014 Silverado Sierra Yukon Tahoe Suburban 551573LS0WP-3

ICT Billet #ad - Compatible with 1998-02 camaro water Pump with spacers or 2010-2015 Camaro Water Pump. Compatible with truck/SUV or 2010-15 Camaro crank pulley. Includes accessory brackets w/ manual tensioner, water pump spacers w/ gaskets and mounting hardware. Compatible with 105 amp or 145 amp alternators ONLY. Made in wichita, Kansas from aerospace grade, usa produced, billet aluminum.
BrandICT Billet #ad
ManufacturerICT Billet #ad
Weight5.56 Pounds
Part Number551573LS0WP-3

9. Sawyer Auto


Serpentine Alternator Belt Tensioner w/Pulley Compatible with Audi A4 VW Passat 1.8 Turbo

Sawyer Auto #ad - Designed with the latest software and manufactured with modern tooling. Same quality as OE for less money. Installs the same as factory unit. Same dimensions as OE part. Direct fit replacement.
BrandSawyer Auto #ad
ManufacturerSawyer Auto #ad
Part NumberSAB2-6419228