Gates 39477 belt tensioner for the 2020-2025 Subaru Outback H4 2.4L or 2.5L and other vehicles keeps the V-ribbed accessory drive belt under steady tension. Also called a serpentine belt tensioner, it takes the place of a worn tensioner on the accessory drive.
- Gates DriveAlign automatic belt drive tensioner
- Patented labyrinth seal protects the internal components of the tensioner
- Patented vibration-damping system absorbs extreme vibration to improve tensioner, belt and accessory life
- Torsional round spring design for reliable, consistent tension
Quick facts
- Part: Gates 39477 belt tensioner
- Also called: serpentine belt tensioner
- Fits: the 2020-2025 Subaru Outback H4 2.4L or 2.5L and other vehicles
- Material: Thermoplastic
- Condition: New
A worn tensioner can show up as belt squeal, a fluttering belt or a noisy pulley. These signs alone do not prove the tensioner is at fault; a glazed belt, for example, can squeal as well.
Fits
The vehicles it fits include the 2020-2025 Subaru Outback H4 2.4L or 2.5L, the 2025 Subaru Forester H4 2.5L and the 2017-2025 Subaru Impreza H4 2.0L and 2024-2025 Impreza H4 2.5L. It is built to rigid tolerances for OE fit, form and function, and its seal is made to meet or exceed OE life expectancy requirements. This listing is one tensioner, and the 2020-2025 Subaru Outback H4 2.4L or 2.5L takes one. If your Subaru is not named here, look up its year and engine in the "Vehicles it fits" section.
Specifications
Fit and size
- Quantity per vehicle: 1
- Pulley quantity: 1
- Outside diameter: 70 mm (2.76 in)
- Width: 25.5 mm (1 in)
- Bearing bore inside diameter: 17 mm (0.67 in)
- Mounting holes: 2
Build and materials
- Material: Thermoplastic
- Belt type: V-ribbed
- Pulley contact surface: smooth/backside, not flanged
- Grade type: OE Exact
- Condition: New
- Country of origin: Canada
In the box
One belt tensioner assembly.
Interchange: 999745A · 23769AA080 · 23769AA08A · 23769AA13A · 23769AMO80 · 999745
This part cross-references / interchanges with the following part numbers:
999745A, 39477, 23769AA080, 23769AA08A, 23769AA13A, 23769AMO80, 999745
Frequently Asked Questions
Is this Subaru Outback belt tensioner the right one for the 2020-2025 Outback H4 2.4L or 2.5L?
Yes. Gates 39477 fits the 2020-2025 Subaru Outback with either the H4 2.4L or the H4 2.5L engine. For another year or engine, look in the "Vehicles it fits" section.
Does the Subaru Impreza belt tensioner fit a 2017-2025 Impreza H4 2.0L or a 2024-2025 Impreza H4 2.5L?
Yes. Gates 39477 fits the 2017-2025 Subaru Impreza H4 2.0L and the 2024-2025 Impreza H4 2.5L, one tensioner per vehicle.
Is this Gates drive belt tensioner made for a V-ribbed belt?
Yes. This tensioner is for a V-ribbed belt. It has one pulley with a smooth/backside contact surface and no flange, plus two mounting holes.
Can a bad belt tensioner cause a squealing noise?
Yes, it can. A worn tensioner can show up as belt squeal, a fluttering belt or a noisy pulley, and a shop can check it while the engine is running.
Does Gates 39477 replace number 23769AA080?
Yes. 23769AA080 is one of the interchange numbers listed for Gates 39477 on this page.
