Dayco 89252 | Accessory Drive Belt Tensioner Assembly

Part Number
Accessory Drive Belt Tensioner Assembly

Fits: 98-10 Ford Explorer, 00-10 Mercury Mountaineer, 01-03 Ford Explorer Sport, 01-05 Ford Explorer Sport Trac, 01-11 Ford Ranger, 01-10 Mazda B4000, 07-10 Ford Explorer Sport Trac, 05-10 Ford Mustang, 05-07 Land Rover LR3

Special Price $38.24 Regular Price $44.99
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Dayco® No Slack® Automatic Belt Tensioners are built to outperform and outlast competitive OE parts. This specific Dayco® Automatic Belt Tensioner is manufactured with a specially coated patented flat wire spring to allow the internal tension to be concentric, thus providing a more even degree of constant tension. The heavy duty cast aluminum spring case resists cracking and fatigue. Each component is built to resist rust, endure the toughest of conditions while promoting quieter performance and longer life. This tensioner contains a metallic locator pin built to withstand extreme drive demands and properly locate the tensioner for installation. The patented Deflected Arm Plate dampens arm movement, prolonging the life of the tensioner by limiting the amount of rotational movement.

BRAND: Dayco




Belt TypeSerpentine
DirectionClock Wise
Number of Pulleys1
Pulley 1 Diameter70
Pulley 1 FlatN
Pulley 1 Number of Grooves6
Pulley 1 Width28.3

Locator Pin on Back of Tensioner



  • Goodyear: 49398
  • Gates: 38416
  • Ford: 5R3E-6B209-BA
  • Duralast: 305252
  • Ford: 5R3Z-6B209-BA
  • Motorcraft: BT-86
  • CARQUEST: 38137
  • Four Seasons: 45863
  • Freshstart: 49250
  • NAPA: 38137
  • Ford: 7R3E-6B209-AA
  • Gates: 38137
  • ACDelco: 38416
  • Goodyear: 49250
  • Hayden: 5863
  • Ford: 1L5E-6B209-AB
  • Ford: 6L2E-6B209-CA
  • ACDelco: 38137
  • Ford: 1L5E-6B209-AD
  • Ford: 6L2E-6B209-CB
  • NAPA: 38416
  • CARQUEST: 38416
  • Dorman: 419-210
  • Ford: YL2Z-6B209-AA
  • Ford: 1L5E-6B209-AC


  • 1998-2010 Ford Explorer
  • 2001-2003 Ford Explorer Sport
  • 2001-2005 Ford Explorer Sport Trac
  • 2005-2007 Land Rover LR3
  • 2007-2010 Ford Explorer Sport Trac
  • 2001-2011 Ford Ranger
  • 2000-2010 Mercury Mountaineer
  • 2005-2010 Ford Mustang
  • 2001-2010 Mazda B4000
Customer Questions
Can a serpentine belt cause smoke?
Yes, a serpentine belt can cause smoke. A serpentine belt is an essential component of a vehicle's engine system. It drives various accessories such as the alternator, power steering pump, water pump, and air conditioning compressor. If the serpentine belt becomes worn, damaged, or misaligned, it can cause friction and generate smoke.
Why is my serpentine belt squealing?
The serpentine belt can squeal due to various reasons, including tension issues, worn-out belt, or a problem with the belt's pulleys.
Is my serpentine belt too tight?
If your serpentine belt is causing issues like excessive noise or accelerated wear on the pulleys, it may indicate that the belt is too tight.
Why did my serpentine belt come off?
Serpentine belts can come off due to factors such as belt wear, improper tension, misaligned pulleys, or a faulty tensioner.
Please, mind that only logged in users can submit questions

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