SKP SK39129 Accessory Drive Belt Tensioner Assembly

Accessory Drive Belt Tensioner for Nissan and INFINITI

SKP SK39129 is an accessory drive belt tensioner assembly for select Nissan and INFINITI applications. It helps maintain proper belt tension so the engine-driven accessories operate smoothly and the belt runs with consistent load.

Compatible with a wide range of Nissan GT-R, Nissan 370Z, and INFINITI V6 and V8 applications, this tensioner is built for direct-fit replacement service. SKP SK39129 is also cross-referenced to Continental 49477 and Four Seasons 39129 for the same application.

Key Features

• Accessory drive belt tensioner assembly for belt system service
• Helps maintain correct belt tension for stable accessory operation
• Built from high-quality materials for everyday engine bay demands
• Tested for fit and function before release
• Supports quieter belt operation when the original tensioner is worn
• Direct replacement for select Nissan and INFINITI models

Detailed Description

SKP SK39129 is an accessory drive belt tensioner assembly engineered for vehicles that rely on a properly tensioned serpentine belt to drive vital components. When the tensioner weakens, belt control can become inconsistent, which may affect charging, cooling, and other engine-driven systems. This replacement part restores belt tension management for select Nissan GT-R, Nissan 370Z, and INFINITI models including G37, Q50, Q60, Q70, Q70L, QX50, and QX70 applications.

Fits 2023 Nissan GT-R, N/A. Fits 2009-2021 Nissan GT-R, N/A. Fits 2009-2020 Nissan 370Z, N/A. Fits 2014-2019 INFINITI Q70, N/A. Fits 2015-2019 INFINITI Q70L, N/A. Fits 2014-2017 INFINITI QX50, N/A. Fits 2014-2017 INFINITI QX70, N/A. Fits 2015 INFINITI Q40, N/A. Fits 2014-2015 INFINITI Q50, N/A. Fits 2014-2015 INFINITI Q60, N/A. Fits 2013 INFINITI EX37, N/A. Fits 2013 INFINITI FX37, N/A. Fits 2008-2013 INFINITI G37, N/A. Fits 2011-2013 INFINITI M37, N/A. Fits 2008-2012 INFINITI EX35, N/A. Fits 2009-2012 INFINITI FX35, N/A. Fits 2009-2010 INFINITI M35, N/A. Fits 2010 INFINITI M45, N/A. Fits 2007-2009 Nissan 350Z, N/A. Fits 2007-2008 INFINITI G35, N/A.

Common Problems This Part Can Address

• Belt squeal caused by weak or inconsistent tension
• Visible belt flutter or uneven belt tracking
• Accessory drive noise from a worn tensioner assembly
• Reduced belt control on high-mileage engine drive systems
• Premature belt wear from poor tension management

Installation Notes and Tips

Inspect the belt, pulleys, and surrounding accessory drive components before installation. If the belt shows cracking, glazing, or uneven wear, replace it at the same time to help restore proper system operation. Confirm the vehicle application by year, make, and model before ordering SK39129.

Quality Assurance

SKP builds this tensioner assembly with high-quality materials and tests it for fit and function to support reliable replacement service. The part is intended as a direct-fit solution for the listed Nissan and INFINITI applications.