Kozlira Serpentine Belt Tensioner Kit for BMW 3.0L L6 (2006-2013) — Includes Tensioner, Idler, Belt & Upgraded Bolt

Premium kit for BMW 3.0L engines

The Kozlira Serpentine Belt Tensioner Kit brings a complete drive belt solution to your BMW, pairing a high-quality tensioner, a durable idler pulley, a robust V-ribbed belt, and an upgraded tensioner bolt in one thoughtfully designed package. Built to support the engine accessory drive, this kit offers a cohesive set of components that can help keep belt routing aligned and system loads predictable as you drive, whether you’re navigating busy streets or taking a weekend ride through winding roads.

What’s included

• Drive Belt Tensioner: 11288624196, 11287530314
• Drive Belt Idler Deflection Pulley: 11287535860
• V-Ribbed Belts: 11281628650, 11287527564, 11287535860, 11287549150, 11287628650, 11288624196, 6K1990, W01331681440, W01331779583
• Tensioner Bolt: 11287530315

Compatibility and fit

• Compatible with BMW 2006-2013 3.0L L6 models including 128i, 325i/325xi, 328i/328xi, 330i/330xi, 525i/525xi, 528i, 530i, and X3/X5 variants
• Fits multiple 3.0L L6 configurations across listed year ranges

Upgraded bolt for durability

The tensioner kit includes an upgraded bolt designed to match original sizing while delivering higher strength and resistance to loosening or shock. Steel construction helps prevent stripping and supports long-term reliability during maintenance cycles.

Why this kit matters

• The serpentine belt drives engine accessories; a reliable tensioner helps maintain correct belt tension, reducing slip and wear.
• The idler pulley helps stabilize the belt path, potentially reducing noise and vibration during various drive cycles.
• A well-matched belt and hardware kit supports drivetrain stability, especially as road conditions and loads vary.

Real-world use and benefits

Picture a routine maintenance session that keeps the engine bay orderly and predictable. The kit’s components work together to support steady belt behavior and stable accessory operation, offering possibilities such as smoother idle and more consistent performance over time. Results can vary by vehicle condition and installation, so consider this as a thoughtful upgrade option within regular service intervals.

Note: For proper installation and alignment, consult your service manual or a qualified technician. Regular inspections are advised to detect wear and ensure correct tensioning and belt routing.