A-Premium Belt Tensioner Assembly with Pulley for Infiniti & Nissan — 70mm V-ribbed Pulley, Direct-Fit

The A-Premium Belt Tensioner Assembly with Pulley keeps your Infiniti or Nissan accessory drive belt properly tensioned and running smoothly.

This replacement tensioner assembly is engineered to match original equipment fit and function for many Infiniti and Nissan models. It combines a durable tensioner body with a single V-ribbed pulley sized to OEM specifications so the serpentine belt tracks correctly, reduces noise, and maintains accessory performance. Designed, inspected, and backed by A-Premium with a one-year unlimited-mileage guarantee, the part offers an affordable direct-fit option for routine drivetrain maintenance or repairs.

Which vehicles is this tensioner assembly compatible with?

The A-Premium unit fits a wide range of Infiniti and Nissan models across multiple years. Check the vehicle list and reference numbers to confirm compatibility before ordering; it covers common applications for EX, FX, G, M, Q, QX, 350Z, 370Z, and GT-R series vehicles.

• Infiniti: EX35 (2008–2012), EX37/FX37 (2013), FX35 (2009–2012), G35 (2007–2008), G37 (2008–2013), M35 (2009–2010), M37 (2011–2013), Q40 (2015), Q50/Q60 (2014–2015), Q70/Q70L (2014–2019), QX50/QX70 (2014–2017)
• Nissan: 350Z (2007–2009), 370Z (2009–2019), GT-R (2009–2018)
• Reference numbers: 39129, 119551EA0A/B/C/D, 119551EA9D for cross-checking

How does this part match the original equipment (OE) specification?

The assembly is built to mirror the original part’s critical dimensions and function so it installs like an OE replacement. It uses a V-ribbed pulley with the same outside diameter and width as the factory item to ensure correct belt seating and tensioning.

• Pulley quantity: 1, V-ribbed belt compatibility
• Pulley outside diameter: 70 mm
• Pulley width: 30.5 mm
• Constructed for smooth rotation and low operating noise

What are the practical benefits of replacing the tensioner assembly now?

Replacing a worn tensioner restores proper belt tension, reduces belt slip and noise, and helps prevent accessory drive failures. Doing the job proactively during routine service can avoid secondary damage to alternators, water pumps, power steering pumps, and air conditioning compressors.

• Reduces belt squeal and vibration by maintaining correct tension
• Helps extend service life of belt-driven accessories
• Minimizes risk of sudden belt failure and roadside breakdowns

What warranty and support does A-Premium provide?

A-Premium stands behind this tensioner assembly with a one-year unlimited-mileage guarantee, providing reassurance after installation. Customer support and a broad selection of compatible automotive components make it straightforward to replace related parts if needed.

• One-year unlimited-mileage warranty from A-Premium
• Access to additional accessory drive and repair components
• Check fitment and reference numbers before purchase for best results

Who is this for: This A-Premium Belt Tensioner Assembly is aimed at DIY mechanics, independent repair shops, and fleet owners who need a reliable, cost-effective OE-style replacement for affected Infiniti and Nissan models. If your vehicle shows belt noise, tensioner wear, or scheduled maintenance calls for a replacement tensioner, this assembly offers a direct-fit option that restores proper belt operation without requiring costly dealer parts.