Mercedes-Benz R-Class W251 / V251 (2006 - 2013) Drive Belt Tensioner + Pulley
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- Brand Aftermarket
- Type Belt Tensioners
- Make Mercedes-Benz
- Model R-Class
- Series W251 [2006 - 2013]
Experiencing belt-related problems with your Mercedes-Benz R-Class? When drive belt tensioners fail, you'll notice squealing sounds, belt slippage, and poor accessory performance. This precision-engineered tensioner and pulley assembly provides the perfect solution to restore optimal belt operation and eliminate these troublesome symptoms.
Product Specifications
- Type: Direct Replacement
What's Included
- 1 x Drive Belt Tensioner + Pulley
Performance & Build Quality
- Vibration Reduction: Ensures proper belt tension to reduce vibration, prevent slippage, and eliminate excess noise during operation.
- Reliable Pressure Control: Provides consistent belt tensioning for dependable performance of all engine-driven accessories.
- Belt Protection: Helps prevent early serpentine belt deterioration and replacement needs.
- Robust Materials: Manufactured using premium steel or aluminum construction to withstand demanding engine bay conditions.
- OE-Match Design: Precisely manufactured to original equipment specifications ensuring perfect fit and simple installation process.
Vehicle Applications
- Compatible Models: Mercedes-Benz R-Class W251 / V251 from model years 01/2006, 2007, 2008, 2009, 2010, 2011, 2012 and 2013.
- Trim Level: R350 4MATIC / R500 4MATIC
- Engine Types: 251.065 / 251.072 / 251.165 / 251.172
This replacement tensioner assembly will effectively resolve belt tension problems and restore proper power delivery to your vehicle's accessory systems, ensuring dependable operation.
Always confirm fitment compatibility with your exact vehicle specifications prior to purchase. We recommend professional installation to ensure proper function and performance.
Every order except for oversized items will automatically receive free standard shipping, so you can get your items without any additional cost.
If you need your order faster, express and same-day delivery options are available at checkout. Express and same-day delivery fees vary depending on the product and delivery location, so we’re unable to provide a standard rate in advance — the cost will be shown once your items are added to your cart.
We aim to provide same-day dispatch for all weekday orders placed before 12:00 PM (AEST during standard time or AEDT during daylight saving).
Once your order has been dispatched, you will receive an email notification with your tracking details. Tracking information may take up to 24 hours to appear, and please check your spam or junk folder if you don’t see the email in your inbox. Tracking is always included for orders above $50. For orders below $50, tracking will be provided if available.
For international orders, please note that shipments may be subject to import duties, taxes, and customs processing fees, which are applied once the package reaches its destination country. These charges are not included in our shipping fees and are the responsibility of the recipient.
Important Notes: While we strive to provide accurate delivery estimates, delays may occur due to stock availability, courier conditions, or other unforeseen factors. We appreciate your understanding and patience in these situations. Regardless of order value, every item is packed with care and delivered as promptly as possible.
All orders are covered by our free Standard Return & Refund Policy.
If you change your mind, you can return any unused, uninstalled product in its original condition at any time (there is no time limit) for store credit.
If your item arrives defective, damaged, or incorrect, please notify us within 30 days. We cover return shipping for confirmed defects or errors and will provide either a replacement or a full refund to your original payment method.
For change-of-mind returns, you’ll need to cover the return shipping cost. To start the process, simply fill out the required fields in our contact form.
All approved change-of-mind returns are processed as store credit only. Once your item has been received and inspected, processing may take up to 15 business days.
Every return is handled with care to ensure a fair and reliable process.
If your item arrives defective, damaged, or incorrect, please notify us within 30 days. We cover return shipping for confirmed defects or errors and will provide either a replacement or a full refund to your original payment method.
OEM-Standard Belt Tensioners
Don't settle for cheap replacements, choose lasting reliability. Built to OEM specifications for precise tension control and long-term reliability. Each unit is tested for load capacity, bearing alignment, and damping performance to ensure smooth, vibration-free belt operation. Designed to maintain consistent tension under all temperature and load conditions.
Select a numbered point above
Tap any marker to discover the engineering behind each component.
Component Breakdown
Engineering features explained
Precision Pulley Wheel
Machined to exact OEM tolerances for optimal belt tracking and reduced friction. The pulley surface is treated for wear resistance and balanced to prevent vibration at high engine speeds.
High-Load Bearing Assembly
Sealed bearing system provides smooth, low-resistance rotation and long service life. Factory-lubricated and tested for noise, vibration, and harshness (NVH) to ensure silent operation and durability under load.
Heavy-Duty Spring Mechanism
Internal torsion spring maintains consistent belt tension through dynamic load changes. Designed for precise deflection and recovery to prevent belt slippage or premature wear.
Reinforced Mounting Bracket
Die-cast aluminium or steel bracket provides structural rigidity and perfect alignment with the engine drive system. Tested for thermal expansion and vibration resistance to ensure reliable operation in demanding environments.
Corrosion-Resistant Coating
Protective surface finish guards against oxidation, coolant exposure, and road contaminants. Extends the life of both pulley and housing components for consistent performance over time.
