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Dayco 89378 Belt Tensioner

4.8 4.8 out of 5 stars 331 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Automotive Replacement Belt Tensioners by Dayco
$68.78 with 19 percent savings
List Price: $84.98

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Purchase options and add-ons

Brand Dayco
Compatible Devices Car
Item Weight 2.1 Pounds

About this item

  • Many products require vehicle-specific fitment
  • View the Compatibility table to ensure the part fits your year, make, model and submodel
  • Please reference the submodel information located on the far left within the Compatibility table under "Notes"
  • Please note: Due to our high sales volume, it may take up to 2-business days for us to reply to all questions and/or requests.
  • We do not offer shipping to APO/FPO
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Frequently bought together

Dayco 89378 Belt Tensioner
$68.78
Get it as soon as Sunday, May 19
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Dayco Drive Rite 5080950DR Serpentine Belt
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Product Description

Dayco 89378 Belt Tensioner

Product information

Technical Details

Additional Information

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Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Dayco 89378 Belt Tensioner

Dayco 89378 Belt Tensioner

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What's in the box

  • Belt Tensioner

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    Price-19% $68.78
    List: $84.98    		$27.77$90.46$119.62-21% $70.78
    List: $89.70    		$57.52
    Delivery
    Get it as soon as Sunday, May 19
    —
    Get it as soon as Monday, May 20
    —
    Get it as soon as Tuesday, May 21
    Get it May 16 - 20
    Customer Ratings
    4.84.8 out of 5 stars331
    5.05.0 out of 5 stars4
    4.54.5 out of 5 stars6
    3.83.8 out of 5 stars36
    5.05.0 out of 5 stars10
    4.34.3 out of 5 stars10
    Sold By
    Amazon.com
    Hires Automotive
    Sixity Auto
    Amazon.com
    Amazon.com
    Sixity Auto

    Looking for specific info?

    Customer reviews

    4.8 out of 5 stars
    4.8 out of 5
    331 global ratings

    Customers say

    Customers like the quality, ease of installation, noise, fit and performance of the mechanical belt. For example, they mention it's top notch, easy to mount and that it stops squealing. That said, they're happy with the performance and that the belt works great as a replacement part.

    AI-generated from the text of customer reviews

    18 customers mention18 positive0 negative

    Customers like the fit of the mechanical belt. They mention that it fits great, and stays tight.

    "came in time, perfect fit, its' been 2 weeks through 2 camping trips and a fishing trip, no issues!!!2007 Toyota Tundra 5.7 V8" Read more

    "Fit’s perfect, 2014 Tundra.Ease to install." Read more

    "...Great product and fit perfectly. Saved me about $200 doing it myself.Highly recommended" Read more

    "Exact fit for my 2011 tundra 5.7L. Same manufacturer as OEM. Excellent quality and no more intermittent squeaking while driving." Read more

    17 customers mention13 positive4 negative

    Customers like the noise level of the mechanical belt. They say it doesn't squeal and hasn't yet shredded. The installation went smooth and all their squishy bearing issues were fixed.

    "...tensioner, along with the other parts, have been running smooth and quiet since they were put on around 6-8 weeks ago...." Read more

    "...Took about 30 minutes. Tested it: No noise whatsoever...." Read more

    "Worked great! No more squealing." Read more

    "The product arrived as advertised and was an excellent fix for my squeaky bearing issue." Read more

    15 customers mention15 positive0 negative

    Customers are satisfied with the performance of the mechanical belt. They mention that it works great and is identical to the OEM part. Some say that it is a great replacement part for their truck and Toyota Land Cruiser.

    "Works as should. Just a pain to install on my 2011 Tundra but any brand would be a pain." Read more

    "not the easiest to install but works great." Read more

    "Good replacement for considerably more expensive OEM part. Works great." Read more

    "Worked great! No more squealing." Read more

    14 customers mention14 positive0 negative

    Customers are satisfied with the quality of the mechanical belt. They mention that it is top notch, awesome, and solid.

    "Very high quality definitely recommend" Read more

    "awesome" Read more

    "...Great product and fit perfectly. Saved me about $200 doing it myself.Highly recommended" Read more

    "Exact fit for my 2011 tundra 5.7L. Same manufacturer as OEM. Excellent quality and no more intermittent squeaking while driving." Read more

    13 customers mention10 positive3 negative

    Customers find the installation of the mechanical belt to be easy. They mention that it's a direct replacement and doesn't take long to do yourself.

    "not the easiest to install but works great." Read more

    "Fit’s perfect, 2014 Tundra.Ease to install." Read more

    "Make sure its a Dayco product b/c they work the best. Was easy to install. Use a 6MM hex socket. Good product." Read more

    "Works as should. Just a pain to install on my 2011 Tundra but any brand would be a pain." Read more

    4 customers mention4 positive0 negative

    Customers appreciate the value of the mechanical belt. They say it is a great buy and a good value for the price.

    "It was at the best price anywhere, exact same brand as oem part for the 5.7...." Read more

    "Cheap and made good fixed my problem with belt ripping" Read more

    "very good price , fixed my truck in one hours; time." Read more

    "A good value..." Read more

    The old one was in two pieces new one is ...
    5 Stars
    The old one was in two pieces new one is ...
    The old one was in two pieces new one is prefect stop the pig squeal noise in the belt thank you
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    Top reviews from the United States

    VA Boating
    5.0 out of 5 stars Worked great for replacement part on 2009 Toyota Land Cruiser
    Reviewed in the United States on March 11, 2024
    Verified Purchase
    Was experiencing some squeaking/chirping coming from front part of engine on 2009 Toyota Land Cruiser. Typically that is the sign of serpentine belt, idler pulley and/or tensioner bearings going out, so I ordered this part, along with the belt and idler to replace my (possibly original) parts. I dropped of parts and car with my mechanic one morning and picked it up later that afternoon. Immediately noticed the noise was gone. Since I didn't do the work myself, I cannot say which part was causing the noise, but I can say that this tensioner, along with the other parts, have been running smooth and quiet since they were put on around 6-8 weeks ago. This SUV has the 5.7L V8, so my guess is that this fits a number of Toyotas and Lexus's with that engine, and whatever else the company says it will fit. I always appreciate it when the person leaving the review mentions what specific make/model car the parts were used on, so I wanted to include mine. Helps when you know for sure, as sometimes despite the product description, it is possible the fit is incorrect. Good part so far! Will update if anything changes, but I don't expect it to.
    Helpful
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    Dan
    5.0 out of 5 stars Fit and worked well
    Reviewed in the United States on April 17, 2024
    Verified Purchase
    Just like OEM tensioner!
    Helpful
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    Dartt99
    5.0 out of 5 stars works as it should
    Reviewed in the United States on April 17, 2024
    Verified Purchase
    Works as should. Just a pain to install on my 2011 Tundra but any brand would be a pain.
    Helpful
     Report
    Thomas M.
    5.0 out of 5 stars new out of the box, not a used part.
    Reviewed in the United States on February 8, 2024
    Verified Purchase
    not the easiest to install but works great.
    Helpful
     Report
    Levi2337
    5.0 out of 5 stars Works on 5.7 L Sequoia
    Reviewed in the United States on March 28, 2024
    Verified Purchase
    Good replacement for considerably more expensive OEM part. Works great.
    Helpful
     Report
    Tony
    5.0 out of 5 stars Buy this one! Don’t Try to Save a Buck!
    Reviewed in the United States on February 5, 2023
    Verified Purchase
    I was in a tight spot on 10/5/21 when my Tundra’s alternator died and figured I’d save a few bucks ordering and installing a lower priced Belt Tensioner Pulley along with new Dayco Idler Pulley (p/n: 89502), Bando Belt (8PK2410 OEM Quality Serpentine), and locally rebuilt alternator. I noticed a squeaking sound 6/22/22 and did the water test and verified it wasn’t the belt. I knew the tensioner was bad because when engine was at idle the squeak progressively turned into it COUGAR SHRIEKING OVER ITS KILL and went away when revving the engine because that creates belt tension, eliminating the need for the belt tensioner. I ordered the Dayco 89378 Belt Tensioner and received it 2/4/23. I installed it this morning. Took about 30 minutes. Tested it: No noise whatsoever. Dayco is the Toyota OEM supplier that’s factory spec and labeled just like my original that lasted 109k miles. It has a pin installed to make installation and belt routing easier just like OEM.
    Tools I used:
    Belt removal tool
    14mm socket
    3/8 ratchet
    3” extension
    12mm socket
    6mm Allen key head socket
    Learn from my mistake. Save a Buck on wipers or windshield fluid. Spend the money on OEM parts and good tires. I have no doubts this will last nearly as long.
    5 people found this helpful
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    bornfree
    5.0 out of 5 stars Highly recommend
    Reviewed in the United States on May 10, 2024
    Verified Purchase
    Very high quality definitely recommend
    Helpful
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    Ran
    5.0 out of 5 stars awesome
    Reviewed in the United States on February 24, 2024
    Verified Purchase
    awesome
    Helpful
     Report