Gates 39129 belt tensioner for the 2009-2021 Nissan GT-R V6 3.8L and other vehicles applies spring tension to the drive belt. This Gates automatic belt tensioner is listed for the supercharger position.
- Gates DriveAlign automatic belt tensioner product line
- Patented labyrinth seal protects the internal components
- Patented vibration-damping system absorbs extreme vibration to improve tensioner, belt and accessory life
- Torsional round spring design for reliability and consistent tension
- Steel construction with one flanged pulley and a smooth backside contact surface
Quick facts
- Part: Gates 39129 belt tensioner
- Also called: serpentine belt tensioner
- Fits: 2009-2021 Nissan GT-R V6 3.8L and other vehicles
- Position: Supercharger
- Material: Steel
- Condition: New
A worn tensioner can show up as belt squeal or chirp, a belt that wobbles or wears unevenly, or a rough, loose pulley. Other belt or accessory problems can sound similar, so with the engine off and cool, look the belt over for fraying or glazing and check the pulley for play before you replace the tensioner.
Fits
This Gates drive belt tensioner is made to rigid tolerances and specifications for OE fit, form and function. The fitment also includes the 2009-2020 Nissan 370Z V6 3.7L and the 2014-2019 Infiniti Q70 V6 3.7L; if your car is a different one, look it up in the "Vehicles it fits" section. A car takes one of these tensioners, at the supercharger position.
Specifications
Fit and size
- Position: Supercharger
- Quantity per vehicle: 1
- Outside diameter: 70 mm (2.76 in)
- Bearing bore inside diameter: 17 mm (0.67 in)
- Width: 30.5 mm (1.2 in)
- Mounting holes: 1
- Pulley: 1, flanged
Build and materials
- Material: Steel
- Belt type: V-ribbed
- Contact surface: smooth/backside
- Grade type: OE Exact
- Condition: New
- Country of origin: Mexico
In the box
One belt tensioner assembly.
Interchange: 4048 · 49477 · 119551EA0A · 119551EA0B · 119551EA0C · 119551EA0D · 119551EA9D · 119551EA9E · 11955JK21A · 89694 · 305694 · 999512A · 999512
This part cross-references / interchanges with the following part numbers:
39129, 4048, 49477, 119551EA0A, 119551EA0B, 119551EA0C, 119551EA0D, 119551EA9D, 119551EA9E, 11955JK21A, 89694, 305694, 999512A, 999512
Frequently Asked Questions
Is this a belt tensioner for the 2009-2020 Nissan 370Z V6 3.7L?
Yes. Gates 39129 is listed for the 2009-2020 Nissan 370Z V6 3.7L. For any other car, look it up in the "Vehicles it fits" section on this page.
Does the Gates 39129 come as a complete tensioner assembly?
Yes. Gates 39129 is one tensioner assembly with a single flanged pulley. The listing is for one tensioner, which is the quantity each application takes.
What are the main dimensions of the Gates 39129 belt tensioner?
It has a 70 mm (2.76 in) outside diameter, a 30.5 mm (1.2 in) width and a 17 mm (0.67 in) bearing bore. The pulley is flanged, with a smooth backside contact surface.
What does the patented damping system on this Gates DriveAlign belt tensioner do?
The patented vibration-damping system absorbs extreme vibration to improve the life of the tensioner, the belt and the accessories. A torsional round spring provides consistent tension.
Is a serpentine belt tensioner the same thing as the Gates 39129?
Yes. Serpentine belt tensioner is another name for this part. Gates 39129 is built for a V-ribbed belt and is listed for the supercharger position.
