Dayco Accessory Drive Belt Tensioner Assembly 89384
Dayco Accessory Drive Belt Tensioner Assembly 89384 - view 2
Dayco Accessory Drive Belt Tensioner Assembly 89384
Dayco Accessory Drive Belt Tensioner Assembly 89384 - view 2

Dayco Accessory Drive Belt Tensioner Assembly P/N:89384

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$71.99
MPN: 89384
Item Package Quantity: 1
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Dayco Accessory Drive Belt Tensioner Assembly P/N:89384
Dayco Accessory Drive Belt Tensioner Assembly P/N:89384
$71.99

Keep the serpentine belt properly tensioned and every accessory pulley spinning with the Dayco Accessory Drive Belt Tensioner Assembly 89384. This automatic tensioner drops in as a direct-fit replacement for the listed applications, including the 2005-2019 Nissan Frontier, 2005-2012 Nissan Pathfinder, 2005-2015 Nissan Xterra, 2017-2024 Nissan Titan, 2016-2024 Nissan Titan XD, 2012-2021 Nissan NV1500/NV2500/NV3500 and 2009-2012 Suzuki Equator (see the Buyer's Guide tab for the full list and engine coverage). It applies steady spring load to the serpentine belt so it tracks correctly across the accessory drive.

  • Automatic tensioner: self-adjusting design that maintains belt tension as the belt wears.
  • Clockwise direction with a single flat pulley measuring 76 mm in diameter and 28 mm wide.
  • Serpentine belt type: built for serpentine accessory-drive systems.
  • Country of origin: United States.

If a worn, noisy, or seized tensioner is the cause of belt squeal, chirp, or belt flutter, this assembly replaces it. Inspect the belt and other drive components while servicing.

Fitment engines: V6-4.0L and V8-5.6L, varying by application.

Interchange: 780298 · 38378 · 49394 · 999172A

This part cross-references / interchanges with the following part numbers:

780298, 38378, 49394, 999172A, 11955-EA200, 11955-EA20A, 11955-EA20B, 17540-82Z00, 17540-82Z20

Frequently Asked Questions

What is the Dayco 89384?

It is an automatic accessory drive belt tensioner assembly that applies steady spring load to the serpentine belt, keeping it properly tensioned across the accessory drive pulleys.

Which vehicles does it fit?

Listed applications include the 2005-2019 Nissan Frontier, 2005-2012 Pathfinder, 2005-2015 Xterra, 2017-2024 Titan, 2016-2024 Titan XD, 2012-2021 NV1500/NV2500/NV3500 and 2009-2012 Suzuki Equator. See the Buyer's Guide tab.

What size is the pulley?

It uses a single flat pulley measuring 76 mm in diameter and 28 mm wide, and the tensioner rotates in the clockwise direction.

What are signs the tensioner may need replacing?

Belt squeal, chirp, or belt flutter can point to a worn, noisy, or seized tensioner. Diagnose the cause first; if the tensioner is at fault, this assembly replaces it.

What belt type does it use?

It is built for serpentine accessory-drive belt systems. Inspect the belt and other drive components while servicing the tensioner.

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