BMW E36 / E46 3 Series, E39 5 Series, E53 X5 & E85 / E86 Z4 Drive Belt Tensioner Pulley & Idler Pulley Set 1993 - 2008 (Replaces 11287841228 / 11281748131)

Restore quiet, reliable accessory drive operation on your BMW with this premium drive belt tensioner pulley and idler pulley set, manufactured to OE specifications for direct replacement of the worn factory pulleys. Drive belt pulleys are a critical wear component in the BMW accessory drive system — and when their internal bearings begin to fail, they produce the characteristic screeching or rumbling sound that BMW owners dread, often accompanied by vibration through the engine bay. Left unaddressed, a failed pulley can seize, lock up the accessory belt, and cause catastrophic damage to surrounding components including the radiator, cooling fan, hoses, and engine bay wiring. This complete tensioner and idler pulley set provides a comprehensive solution that restores quiet operation, prevents catastrophic failure, and matches OE quality and durability standards for long-term reliable operation.

Features:

• Direct OE replacement design – manufactured to factory specifications matching original equipment part numbers 11287841228 and 11281748131 for clean, modification-free installation
• Premium metal and plastic construction – matches OE quality and durability standards for long-term reliable operation
• Eliminates accessory drive noise – replaces worn factory bearings to remove the screeching, rumbling, and friction sounds that develop with pulley aging
• Prevents catastrophic engine bay damage – timely pulley replacement avoids the cascading damage caused by seized or broken pulleys to radiators, hoses, fans, and surrounding components
• Complete pulley set – includes both tensioner pulley and idler pulley for a comprehensive accessory drive refresh
• Wide chassis compatibility – fits the entire E36 / E46 / E39 / E53 / E85 / E86 BMW range from 1993 through 2008

Specifications:

• Condition: 100% Brand New
• Type: Drive Belt Tensioner Pulley & Idler Pulley Set
• Material: Metal & Plastic Construction
• Quantity: 2 pulleys per set (1x Tensioner + 1x Idler)
• Position: Accessory Drive Belt System
• Purpose: Direct OE Replacement / Preventive Maintenance

OE / Replacement Part Numbers:

• 11287841228
• 11281748131
• 11281748130
• 11281726343
• 11281726181
• 11281730571
• 11281738061
• 11281738605

Fitment:

Critical fitment requirements:

• Hydraulic tensioner vehicles only – will NOT fit vehicles equipped with mechanical tensioner systems
• Clockwise-turning power steering pump configurations only – verify your power steering pump rotation direction before ordering

• BMW 3 Series E36: 320i, 323i, 325i, 328i, M3 3.0, M3 3.2 (1993 – 1998)
• BMW 3 Series E46: 320i, 323i, 325i, 325xi, 328i, 330i, 330xi (1998 – 2005)
• BMW 5 Series E39: 520i, 523i, 525i, 528i, 530i (1998 – 2003)
• BMW X5 E53: 3.0i (2000 – 2006)
• BMW Z4 E85 / E86: 2.2i, 2.5i, 3.0i (2002 – 2008)
• Confirm vehicle model, chassis code, engine variant, tensioner type (hydraulic), and power steering pump rotation before ordering

Contents:

• 1x Drive Belt Tensioner Pulley
• 1x Drive Belt Idler Pulley

Benefits:

• Eliminates the persistent screeching and rumbling noises that develop as factory pulley bearings wear out – restoring quiet, refined accessory drive operation
• Prevents catastrophic accessory drive failure – timely pulley replacement is significantly less expensive than the cascading damage caused by seized or broken pulleys (radiator, fan clutch, hoses, and engine bay components)
• OE-grade quality construction matches original equipment durability for long-term reliable operation matching factory service intervals
• Complete pulley set provides comprehensive accessory drive refresh – addressing both common pulley failure points simultaneously rather than replacing one at a time
• Significant cost savings compared to BMW dealer pulley replacement parts while maintaining equivalent quality and fitment standards
• Wide cross-platform compatibility makes this a versatile replacement set for BMW enthusiasts managing multiple chassis or workshops servicing diverse BMW models from the era

Installation Notes:

• Critical fitment verification required: Confirm your vehicle is equipped with a hydraulic tensioner (NOT a mechanical tensioner) before ordering – mechanical tensioner vehicles will not fit this kit
• Power steering pump rotation verification required: The idler pulley is only compatible with clockwise-turning power steering pump configurations – verify rotation direction before ordering
• Allow the engine to fully cool before beginning belt service to avoid burns from hot engine components
• Inspect the accessory drive belt during pulley replacement – worn or cracked belts should be replaced at the same time to avoid repeat service intervals
• Inspect the water pump, alternator pulley, and crankshaft pulley during installation – worn components in the same drive system should be addressed simultaneously
• Properly tension the accessory drive belt according to factory specifications after pulley installation – improper belt tension causes premature pulley wear
• Verify quiet, smooth accessory drive operation after installation – any continued noise indicates additional worn components requiring inspection
• Professional installation strongly recommended unless you have experience with accessory drive system service procedures
• If unsure about compatibility with your specific BMW variant or tensioner type, contact our team with your year, model, chassis code, engine variant, and tensioner configuration before ordering

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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