What is the main job of a serpentine belt tensioner assembly?

The tensioner assembly's primary role is to keep the serpentine belt at the correct tension. This ensures that all the accessories driven by the belt, like the alternator and power steering pump, operate efficiently and without slipping.

How do I know if I need to replace my belt tensioner?

Common signs include a squealing or chirping noise from the engine bay, especially on startup or when accessories are engaged. You might also notice excessive belt vibration or premature belt wear. If you're replacing the belt, it's often a good idea to replace the tensioner too.

Does this tensioner assembly come with a new belt?

This part is the tensioner assembly only. It does not include a new serpentine belt. We recommend inspecting your current belt for wear and tear and replacing it if necessary.

Gates Serpentine Belt Tensioner Assembly 39129

Name: Gates 08-13 Infiniti G37 V-6 3.7L Tensioner Assy. Belt Drive Tensioner
Brand: Gates
SKU: gates-gates-08-13-infiniti-g37-v-6-3-7l-tensioner-assy-belt-drive-tensioner-t14-882529
Price: 253.22 USD
Availability: BackOrder

Gates 08-13 Infiniti G37 V-6 3.7L Tensioner Assy. Belt Drive Tensioner

$253.22

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Gates Serpentine Belt Tensioner Assembly 39129. Keeps your accessory belt at the right tension for reliable operation.

Key Features

Fits 2008-2016 Infiniti and Nissan V6 3.7L vehicles.
Maintains proper tension on the accessory drive belt.
Helps prevent belt slippage and premature belt wear.
Well-built with durable materials for long service life.
Direct replacement for the original equipment tensioner assembly.

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Will it fit your car?

Product Details

When you're replacing your accessory drive belt, or if you're hearing a squealing or flapping noise from the front of your engine, it's a good time to check the belt tensioner. This Gates tensioner assembly is built to keep the serpentine belt properly tightened on a wide range of Infiniti and Nissan V6 3.7L engines, including models like the Infiniti G37, Nissan 370Z, and Infiniti Q50.

A worn-out tensioner can lead to a loose belt, which means your alternator, power steering pump, and A/C compressor won't work correctly. This Gates assembly is well-built with durable materials to ensure it holds the correct tension over time. It's designed to fit right and function like the original part, helping to prevent premature belt wear and ensuring all your accessories get the power they need.

This tensioner assembly is a direct replacement for the original part. Make sure to consult your vehicle's service manual for specific installation procedures and any other components you might need to replace at the same time, such as the drive belt itself.