Belt Tensioners for Heavy-Duty Trucks

Belt Tensioner

-10%

ACDelco Belt Tensioner 38197

$168.30 $187.00

ACDelco Belt Tensioner 38197 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

ACDelco Belt Tensioner 39071

$160.20 $178.00

ACDelco Belt Tensioner 39071 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

ACDelco Belt Tensioner 39077

$152.10 $169.00

ACDelco Belt Tensioner 39077 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Automann Belt Tensioner 816.49509

$218.70 $243.00

Automann Belt Tensioner 816.49509 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Automann Belt Tensioner 816.49527

$234.90 $261.00

Automann Belt Tensioner 816.49527 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Automann Belt Tensioner 816.49549

$210.60 $234.00

Automann Belt Tensioner 816.49549 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Automann Belt Tensioner 816.49563

$226.80 $252.00

Automann Belt Tensioner 816.49563 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Continental AG Belt Tensioner 49545

$184.50 $205.00

Continental AG Belt Tensioner 49545 is a real accessory drive belt tensioner product for heavy-duty... ..

-10%

Cummins Belt Tensioner 3978022

$135.90 $151.00

Cummins Belt Tensioner 3978022 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89203

$115.20 $128.00

Dayco Belt Tensioner 89203 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89219

$139.50 $155.00

Dayco Belt Tensioner 89219 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89228

$123.30 $137.00

Dayco Belt Tensioner 89228 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89257

$236.70 $263.00

Dayco Belt Tensioner 89257 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89268

$189.90 $211.00

Dayco Belt Tensioner 89268 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89380

$198.00 $220.00

Dayco Belt Tensioner 89380 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89383

$224.10 $249.00

Dayco Belt Tensioner 89383 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89419

$214.20 $238.00

Dayco Belt Tensioner 89419 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89420

$118.80 $132.00

Dayco Belt Tensioner 89420 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89440

$163.80 $182.00

Dayco Belt Tensioner 89440 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89441

$171.90 $191.00

Dayco Belt Tensioner 89441 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89442

$202.50 $225.00

Dayco Belt Tensioner 89442 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89445

$110.70 $123.00

Dayco Belt Tensioner 89445 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89450

$94.50 $105.00

Dayco Belt Tensioner 89450 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89473

$135.00 $150.00

Dayco Belt Tensioner 89473 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89477

$102.60 $114.00

Dayco Belt Tensioner 89477 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89478

$157.50 $175.00

Dayco Belt Tensioner 89478 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89480

$181.80 $202.00

Dayco Belt Tensioner 89480 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89481

$207.90 $231.00

Dayco Belt Tensioner 89481 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89482

$107.10 $119.00

Dayco Belt Tensioner 89482 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89489

$173.70 $193.00

Dayco Belt Tensioner 89489 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89492

$149.40 $166.00

Dayco Belt Tensioner 89492 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89497

$222.30 $247.00

Dayco Belt Tensioner 89497 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89498

$206.10 $229.00

Dayco Belt Tensioner 89498 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89617

$131.40 $146.00

Dayco Belt Tensioner 89617 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89930

$194.40 $216.00

Dayco Belt Tensioner 89930 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89933

$186.30 $207.00

Dayco Belt Tensioner 89933 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89934

$155.70 $173.00

Dayco Belt Tensioner 89934 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89935

$216.00 $240.00

Dayco Belt Tensioner 89935 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89941

$147.60 $164.00

Dayco Belt Tensioner 89941 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89947

$165.60 $184.00

Dayco Belt Tensioner 89947 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dayco Belt Tensioner 89955

$126.90 $141.00

Dayco Belt Tensioner 89955 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Dorman Belt Tensioner 419-002

$176.40 $196.00

Dorman Belt Tensioner 419-002 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38105

$112.50 $125.00

Gates Belt Tensioner 38105 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38178

$81.90 $91.00

Gates Belt Tensioner 38178 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38195

$161.10 $179.00

Gates Belt Tensioner 38195 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38278

$153.00 $170.00

Gates Belt Tensioner 38278 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38501

$116.10 $129.00

Gates Belt Tensioner 38501 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38506

$179.10 $199.00

Gates Belt Tensioner 38506 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38507

$144.90 $161.00

Gates Belt Tensioner 38507 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38511

$169.20 $188.00

Gates Belt Tensioner 38511 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38518

$108.00 $120.00

Gates Belt Tensioner 38518 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38537

$187.20 $208.00

Gates Belt Tensioner 38537 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38540

$98.10 $109.00

Gates Belt Tensioner 38540 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38556

$199.80 $222.00

Gates Belt Tensioner 38556 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38569

$83.70 $93.00

Gates Belt Tensioner 38569 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38579

$203.40 $226.00

Gates Belt Tensioner 38579 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38587

$91.80 $102.00

Gates Belt Tensioner 38587 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38590

$211.50 $235.00

Gates Belt Tensioner 38590 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38610

$132.30 $147.00

Gates Belt Tensioner 38610 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38613

$99.90 $111.00

Gates Belt Tensioner 38613 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38620

$185.40 $206.00

Gates Belt Tensioner 38620 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38667

$148.50 $165.00

Gates Belt Tensioner 38667 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38668

$162.90 $181.00

Gates Belt Tensioner 38668 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38670

$128.70 $143.00

Gates Belt Tensioner 38670 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38671

$140.40 $156.00

Gates Belt Tensioner 38671 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38702

$177.30 $197.00

Gates Belt Tensioner 38702 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38726

$124.20 $138.00

Gates Belt Tensioner 38726 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 38731

$136.80 $152.00

Gates Belt Tensioner 38731 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 39051

$90.00 $100.00

Gates Belt Tensioner 39051 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 39073

$120.60 $134.00

Gates Belt Tensioner 39073 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 39150

$171.00 $190.00

Gates Belt Tensioner 39150 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Gates Belt Tensioner 39475

$195.30 $217.00

Gates Belt Tensioner 39475 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

International Belt Tensioner 3003427C93

$144.00 $160.00

International Belt Tensioner 3003427C93 is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Litens Belt Tensioner 999146A

$113.40 $126.00

Litens Belt Tensioner 999146A is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Litens Belt Tensioner 999707A

$243.00 $270.00

Litens Belt Tensioner 999707A is a real accessory drive belt tensioner product for heavy-duty truck... ..

-10%

Litens Belt Tensioner 999773A

$121.50 $135.00

Litens Belt Tensioner 999773A is a real accessory drive belt tensioner product for heavy-duty truck... ..

Sold Out

Cross Reference #:-----------------------------Freightliner - A4722000270Freightliner - A4722000170Detroit-Diesel - EA4722001070Dayco - 89498DAYContitech - 49603Freightliner - A4722000570Goodyear... ..

Sold Out

Tensioner

Sold Out

Cross Reference #:-----------------------------Goodyear - 55161Contitech - 49563Gates - 38587For Use : --------------International Kenworth Peterbilt Volvo ..

Sold Out

Tensioner

Sold Out

Cross Reference #:-----------------------------Goodyear - 55171Contitech - 49514Gates - 138501For Use : --------------Freightliner Kenworth Peterbilt Sterling Western... ..

Sold Out

Tensioner

Sold Out

Cross Reference #:-----------------------------Contitech - 49601Dayco - 89477DAYGates - 38671Goodyear - 55176 For Use : --------------Mack Volvo ..

Sold Out

Tensioner

Sold Out

Cross Reference #:-----------------------------Goodyear - 55709Contitech - 49520Gates - 38503For Use : --------------Freightliner Sterling Western Star ..

Showing 1 to 81 of 81 items

Heavy-Duty Belt Tensioners for Serpentine and Accessory Drive Systems

Shop belt tensioners for heavy-duty trucks and commercial vehicles. This category includes automatic belt tensioners and accessory drive tensioners designed to help keep serpentine belts operating at the correct tension across demanding diesel and fleet applications.

Heavy-Duty Belt Tensioners for Serpentine and Accessory Drive Systems

Our selection includes heavy-duty replacement tensioners from trusted brands used in commercial truck service. Whether you are matching a known part number or replacing a worn tensioner during accessory drive repair, this category helps narrow the correct option for your engine and belt system.

How to Choose the Right Belt Tensioner

A replacement belt tensioner should be matched carefully to the original application. Even when two units appear similar, the correct part still depends on the mounting design, pulley alignment, operating range, and the exact accessory drive layout used on the engine. The safest starting point is always the original part number and known application.

Part number: compare the original tensioner number before ordering
Application: verify the part matches the intended truck engine and accessory drive system
Mounting style: confirm the bracket and installation design match the original unit
Pulley alignment: make sure the replacement supports proper belt tracking
Heavy-duty use: choose a tensioner built for commercial diesel operating conditions

Why Belt Tensioners Matter in Commercial Truck Service

In a heavy-duty serpentine belt system, the tensioner does more than hold the belt in place. It helps maintain the correct operating tension as the engine runs through load changes, vibration, heat, and long service intervals. If the tensioner becomes weak, worn, or starts sticking, the belt may no longer track or tension correctly.

This can affect multiple engine-driven accessories at the same time. For that reason, many repair shops and fleet technicians treat belt tensioner replacement as an important part of accessory drive maintenance rather than a minor add-on item.

Common Signs a Belt Tensioner May Need Replacement

A failing tensioner often gives warning signs before complete belt system failure. During inspection, it is smart to look not only at the belt itself but also at the tensioner body, pulley movement, spring action, and belt tracking behavior under load.

Squealing, rattling, or other abnormal belt drive noise
Improper belt tracking or visible misalignment
Weak belt tension or repeated belt slip
Sticking, rough, or notchy movement in the tensioner arm
Visible wear around the pivot, bushing, or pulley area

Belt and Tensioner Replacement Often Go Together

Replacing only the belt may not solve the problem if the tensioner is already worn. In many heavy-duty repairs, the best result comes from inspecting both components together. A new serpentine belt installed on a weak or sticking tensioner can wear unevenly, create noise, or shorten the service life of the replacement belt.

If you are servicing the accessory drive system at the same time, you may also want to review Belts and other related heavy-duty components such as Compressors when the repair involves multiple engine-driven systems.

Browse Belt Tensioners by Part Number and Application

Explore this category to compare heavy-duty belt tensioners by part number, brand, and replacement need. Whether you are sourcing an automatic tensioner for preventive maintenance or handling a fast repair on a working truck, this collection is built to help you find the correct commercial replacement more efficiently.