Dayco 89399 belt tensioner for the 2007-2013 BMW 328i and other vehicles holds the accessory drive belt under tension. This Dayco belt tensioner is also called a serpentine belt tensioner.
- Automatic tensioner type for the belt drive
- Serpentine belt type
- One flat pulley, 70 mm in diameter and 26 mm wide
- Direction: Counter Clock Wise
Quick facts
- Part: Dayco 89399 belt tensioner
- Also called: serpentine belt tensioner
- Fits: 2007-2013 BMW 328i and other vehicles
A squealing belt, a belt that slips or flutters, or a tensioner arm that wobbles can mean this tensioner is worn. A tired belt or a noisy idler pulley can produce those signs too, so rule them out first.
Fits
This tensioner is listed for a wide range of BMW models, including the 2007-2013 BMW 328i, the 2008-2013 BMW 128i and the 2009-2013 BMW 328i xDrive. If your BMW is not one of those, open the "Vehicles it fits" section and look up your exact model and engine.
Specifications
Fit and size
- Quantity per vehicle: 1
- Number of pulleys: 1
- Pulley diameter: 70 mm
- Pulley width: 26 mm
Build and materials
- Type: Automatic
- Belt type: Serpentine
- Pulley face: flat
- Direction: Counter Clock Wise
In the box
One belt tensioner in this listing; a BMW listed here needs just one.
Interchange: 39112 · 49463 · 999444A · F565565
This part cross-references / interchanges with the following part numbers:
39112, 49463, 999444A, F565565, 11.28.7.530.314
Frequently Asked Questions
Does Dayco 89399 work as a 2007-2013 BMW 328i belt tensioner?
Yes, Dayco 89399 is listed for the 2007-2013 BMW 328i; open the "Vehicles it fits" section to check your exact model and engine.
Is Dayco 89399 also a 2008-2013 BMW 128i belt tensioner?
Yes. Dayco 89399 is listed for the 2008-2013 BMW 128i, and the 2013 model is listed with the L6-3.0L engine.
What size is the pulley on this Dayco automatic belt tensioner?
Dayco 89399 has one flat pulley that measures 70 mm in diameter and 26 mm wide.
Does this Dayco tensioner go with a serpentine belt?
Yes. Its belt type is serpentine, and it is an automatic tensioner with Counter Clock Wise direction.
Is it okay to keep driving with a rattling belt tensioner?
No. A rattling or squealing belt drive should be looked at promptly, and this belt tensioner replaced if it is worn, because a loose belt can affect the accessories it turns.
