Accessory Belt Tensioner Assembly
- Mfg Part #
- 11288604266 11288604266
- ECS Part #
- ES#3663898
- Brand
-
Product Details
Restore the smooth, reliable operation of your accessory drive with this OEM-quality replacement drive belt tensioner from Febi Bilstein. Over time, your BMW’s factory tensioner suffers from spring fatigue and bearing wear, leading to belt slip, annoying squeals, and uneven belt tracking. Left unchecked, a failing tensioner can cause the drive belt to shred or slip off completely—a major hazard on BMW N55 and S55 engines where a shredded belt can be pulled past the front crankshaft seal, leading to catastrophic engine failure.
Engineered to match the exact physical dimensions and spring tension of the original factory unit, this Febi tensioner provides the perfect amount of pressure to keep your alternator, water pump, and power steering operating efficiently. It is an essential component for any comprehensive accessory belt system refresh, giving you peace of mind and keeping your German machine running flawlessly.
Key Features
Restores Tension: Renews factory-specified pressure on the accessory drive belt to eliminate slip and noise.
Engine Protection: Prevents catastrophic belt failure and throwing a belt.
OEM Quality Fitment: Directly replaces OE numbers 11287599097 and 11288604266 with no modifications required.
Built to Last: Features a rugged cast-aluminum body and high-quality internal spring assembly.
Specifications
Brand: Febi Bilstein
Part Number: 49511
Housing Material: Aluminum
Pulley/Track Roller Material: Plastic
Outer Diameter: 70 mm
Pulley Width: 32 mm
Operating Mode: Automatic
Weight: 0.904 kg (approx. 2.0 lbs)
- 49511
- 11287599097
- 11288604266
This Part Fits the Following Vehicles
| Make | Model | Submodel | Engine | Special Fitment Notes |
|---|---|---|---|---|
| BMW | E70 | X5 xDrive35i | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | E71 | X6 xDrive35i | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F02 | 740Li xDrive | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F02 | ActiveHybrid 7 | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F06 | 640i | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F06 | 640i xDrive | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F07 | 535i | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F07 | 535i xDrive | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F10 | ActiveHybrid 5 | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F10 | 535i | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F10 | 535i xDrive | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F12 | 640i xDrive | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F12 | 640i | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F13 | 640i xDrive | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F13 | 640i | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F15 | X5 sDrive35i | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F15 | X5 xDrive35i | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F16 | X6 sDrive35i | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F16 | X6 xDrive35i | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F22 | M235i | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F22 | M235i xDrive | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F23 | M235i | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F23 | M235i xDrive | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F25 | xDrive3.5i | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F30 | 335i | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F30 | 335i xDrive | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F30 | ActiveHybrid 3 | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F30 | 335i | All | Use vehicle selector to confirm fitment |
| BMW | F30 | 335i xDrive | All | Use vehicle selector to confirm fitment |
| BMW | F32 | 435i | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F32 | 435i xDrive | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F33 | 435i | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F33 | 435i xDrive | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F34 | 335i xDrive | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F36 | 435i | N55 3.0L | Use vehicle selector to confirm fitment |
| BMW | F36 | 435i xDrive | N55 3.0L | Use vehicle selector to confirm fitment |
This Product Is Covered By Our Lifetime Replacement Program
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ECS Tuning will accept returns for unused products within 90 days of the ship date for a refund to the original payment method used. The customer is responsible for the return shipping costs and fees. If selecting to use a prepaid shipping label, the shipping cost will be deducted from the total refunded amount. All new/unused products must be new, unused and must be in the original packaging, including labeling, manuals, hardware, etc. Special order parts are non-refundable.
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Any international orders that are refused at the time of delivery will be subject to carrier abandonment of the package, at which time the ordered products would be discarded by the carrier. The customer will not be refunded for the value of the order and the discarded products are no longer retrievable.
Return Process
ECS Tuning now offers an online returns solution! To get started, simply log into your ECS Tuning account, Click the "View Orders" button on the My Account home page and select the order that you wish to make a return on to begin. If you have any questions, feel free to reach out to our Customer Service Team for assistance!
Please note: Refunds will be processed to the original payment method used on the order or to an in store credit, respective to the type of return that is made as well as any pre-existing arrangements with an ECS Tuning Customer Service Representative. In the event that multiple forms of payment were used, we will refund the value to an in store credit. In the event that a return label is provided, these charges may be deducted from the total refund you receive.
Original shipping costs are non-refundable and the buyer is responsible for return shipping charges. ECS Tuning will not accept COD deliveries.
All in store credit balances will expire after one year from the original purchase date.
Shipping Policy
Free Shipping On Orders $49 & Up
Items marked with a 'Free Shipping On Orders $49 and Up' logo may qualify for free standard economy ground shipping to the contiguous United States (48 states) for most orders with a value greater or equal to $49.00 USD. Oversized products and direct ship products are excluded from this offer unless otherwise noted.
Free Shipping
Items marked as 'Free Shipping' may qualify for free standard economy ground shipping to the contiguous United States (48 states). Oversized products and direct ship products are excluded from this offer unless otherwise noted.
The policies listed above are subject to change at any time without notice.
Lifetime Replacement
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Why You Should Shop From ECS Tuning
ECS Tuning stands out as more than an automotive parts supplier-it's a vibrant community fueled by a shared passion for cars. Born from the enthusiasm of car lovers, we offer an unmatched understanding and commitment to the automotive world, providing high-quality parts and accessories sourced from our own experiences. Our selection is meticulously crafted to meet the highest standards of performance, quality, and design, catering to both the latest trends and classic styles.
Our distinct advantage lies in our passionate team and comprehensive support, offering expert advice and seamless service from selection to installation. Shopping with ECS brings exclusive perks, including our Lifetime Replacement Guarantee and free shipping on orders over $49, enhancing the value of every purchase. As a central hub for car enthusiasts, ECS Tuning fosters a rich community where ideas and experiences flourish, transforming us from a mere supplier into a platform where automotive dreams come to life.
Cancellation Policy
At ECS Tuning, we understand that plans can change. That's why we offer a flexible cancellation policy for our customers. You may cancel your order at any time before you receive the shipment confirmation. This policy is designed to provide you with peace of mind and the flexibility to make adjustments to your purchases as needed. Should you decide to cancel your order, simply reach out to our customer service team, and we will assist you with the process swiftly and efficiently.
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