BMW 3 Series E36 E46 / 5 Series E39 / X5 E53 / Z3 Z4 Drive Belt Tensioner Idler Pulley 11287841228 1992 - 2006

A worn or failing drive belt idler pulley on the M50, M52, M54, S50, S52, S54, S65, and S85 engine families is more than a noise issue — a seized or broken pulley can cause the drive belt to fail suddenly, resulting in damage to the radiator, hoses, cooling fan, and other critical engine bay components. This direct replacement idler pulley restores correct belt deflection and guidance around the accessory drive system, reducing abnormal bearing noise and friction associated with an ageing factory pulley. A straightforward replacement that protects the wider engine bay from the collateral damage a failed pulley can cause.

Features:

• Direct replacement for OEM part numbers 11287841228 · 11281748130 and related references – bolt-on fitment with no modification required
• High-quality metal and plastic construction comparable to factory quality – reduces abnormal bearing noise and friction caused by pulley ageing
• Guides the drive belt correctly around accessory attachments on M50, M52, M54, S50, S52, S54, S65, and S85 engine applications
• Prevents a seized or broken pulley from damaging the radiator, hoses, cooling fan, and surrounding engine bay components
• Offset bolt hole design – confirm your application before ordering (see compatibility notes below)

Specifications:

• Condition: 100% Brand New
• Type: Drive Belt Deflection / Idler Pulley
• Compatible Engines: M50 · M52 · M54 · S50 · S52 · S54 · S65 · S85
• Tensioner Type: Hydraulic Tensioner Only
• Bolt Hole: Offset (not centred)
• OEM Replacement Part Numbers: 11287841228 · 11281726181 · 11281730571 · 11281738061 · 11281738605 · 11281748130 · 11281748131

Fitment:

• BMW 3 Series E36 318i (1994–1995)
• BMW 3 Series E36 325i · 325is (1992–1995)
• BMW 3 Series E36 328i · 328is (1995–1998)
• BMW 3 Series E46 323i · 323is · 323Ci (1998–2000)
• BMW 3 Series E46 328i · 328Ci (1999–2000)
• BMW 3 Series E46 325i · 325Ci · 325xi (2001–2005)
• BMW 3 Series E46 330i · 330xi · 330Ci (2001–2006)
• BMW 5 Series E39 525i (2000–2003)
• BMW 5 Series E39 528i (1998–2001)
• BMW 5 Series E39 530i (2001–2003)
• BMW X5 E53 3.0i (2001–2006)
• BMW Z3 E36 2.8i · 3.0i (1997–2002)
• BMW Z4 E85 2.5i · 3.0i (2003–2005)

Contents:

• 1x Drive Belt Deflection / Idler Pulley

Benefits:

• Eliminates abnormal belt noise and bearing friction associated with a worn or ageing idler pulley
• Prevents sudden pulley failure from causing collateral damage to radiator, hoses, fans, and other engine bay components
• Direct bolt-on replacement restores correct belt deflection and drive system geometry immediately
• Factory-comparable quality ensures reliable long-term performance across the supported engine families

Installation Notes:

• Compatible with hydraulic tensioner vehicles only – will not fit mechanical tensioner applications
• This pulley features an offset bolt hole – it cannot be used on models with a centred bolt hole. If your application requires a centred bolt hole, you will need part number 11281748131 instead
• Compatible with clockwise turning power steering pump applications only
• Verify your existing pulley part number against the replacement references listed above before ordering
• If unsure about your tensioner type or bolt hole configuration, contact our team with your chassis code and engine code prior to purchase

Warranty:

• 12-month standard warranty from date of purchase
• Contact our support team for assistance with any issues

Warranty Assurance:

At K2 Industries, your satisfaction is our priority, and we stand behind the quality of our products. Here's a brief overview of our warranty:

Defect Coverage:
If you find a defect after receiving your order, get in touch with us. We're committed to resolving the issue, whether it involves a replacement, repair, or refund.

Installation Note:
Please inspect your purchase before installation. Unfortunately, damages post-installation are not covered, so ensure everything looks good beforehand.

Claims Made Simple:
Need to make a claim? Reach out to us at support@k2-industries.com. We're here to assist you. Just keep your original packaging and documentation handy.

Your Satisfaction Matters:
Your trust in K2 Industries is appreciated. We're dedicated to ensuring your satisfaction with our quality automotive parts.

Shipping Information:

At K2 Industries, we strive to provide a seamless and efficient shopping experience for automotive enthusiasts like you. Our commitment is to deliver high-quality parts to your doorstep with the utmost care.

Fast and Reliable Shipping:
Many of our products are stocked in our local warehouse, ensuring swift processing and delivery. Orders placed for these items typically ship within 2-5 business days, allowing you to get your parts in no time.

Extended Selection, Global Reach:
To offer you a broader range of automotive parts, some items are sourced from trusted suppliers around the world. While these products might have a slightly longer processing time, we assure you that the wait is worth it for the exceptional quality and value they bring.

Shipping Transparency:
For products shipped internationally, we provide estimated delivery times on the product page. Rest assured, we are continually working to optimize our supply chain and minimize any potential delays.

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To streamline your shopping experience, if your order includes items from both our local warehouse and international suppliers, they may be shipped separately. You will receive separate tracking information for each shipment.

Questions or Concerns?
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