--- product_id: 388374685 title: "Mellbree 2PCS Fiber Optic Bypass Loop, Female and Male Diagnostic Tool" brand: "mellbree" price: "$17.37" currency: USD in_stock: true reviews_count: 10 category: "Mellbree" url: https://www.desertcart.us/products/388374685-mellbree-2pcs-fiber-optic-bypass-loop-female-and-male-diagnostic store_origin: US region: United States of America --- # Seamless network bypass Precision fault detection Wide luxury car compatibility Mellbree 2PCS Fiber Optic Bypass Loop, Female and Male Diagnostic Tool **Brand:** mellbree **Price:** $17.37 **Availability:** ✅ In Stock ## Summary > 🚦 Diagnose Like a Pro, Drive with Confidence! ## Quick Answers - **What is this?** Mellbree 2PCS Fiber Optic Bypass Loop, Female and Male Diagnostic Tool by mellbree - **How much does it cost?** $17.37 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/388374685-mellbree-2pcs-fiber-optic-bypass-loop-female-and-male-diagnostic) ## Best For - mellbree enthusiasts ## Why This Product - Trusted mellbree brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Network Bypass:** Add or remove devices without disrupting your car’s optical network—keep your diagnostics smooth and uninterrupted. - • **Compact & Lightweight Design:** Weighing just 0.01 kg, this tool fits perfectly in your professional kit for on-the-go troubleshooting. - • **Dual Gender Connectors Included:** Comes with both male and female adapters to cover all diagnostic scenarios—flexibility at your fingertips. - • **Universal Luxury Car Compatibility:** Works flawlessly with Audi, BMW, Mercedes, Porsche, VW, and more—your go-to tool for premium automotive diagnostics. - • **Pinpoint Fiber Optic Faults Instantly:** Diagnose in-vehicle fiber-optic issues with surgical accuracy, saving time and costly repairs. ## Overview The Mellbree 2Pcs Fiber Optic Loop is a precision diagnostic tool designed for luxury vehicles’ MOST optical systems. Featuring male and female fiber optic bypass loop adapters, it enables quick fault detection and seamless network bypass without interrupting the in-vehicle fiber-optic network. Compatible with top brands like Audi, BMW, Mercedes, Porsche, and Volkswagen, this lightweight, compact device is essential for professional-grade automotive fiber-optic diagnostics. ## Description What You Get: Mellbree fiber optic loop , If there is any dissatisfaction with the product, or the parts are missing, please contact us at any time. Review: Satellite radio fix - 2008 528i BMW Had intermittent audio cutout and randomly work again. This was due to the satellite tuner located in the drivers side trunk failing. I had to slightly modify the loop by popping it out if its holding clip, then zip tie it to the loop so it doesnt unplug while driving. This eliminates that satellite radio feature and does not cause any codes. Review: Just saved a bunch of money - Just need to remove the housing and you’re good to go. Works immediately. ## Features - Fiber optic bypass loop can perfectly diagnose fiber-optic line problems, remove or add a single in-vehicle device, without affecting the in-vehicle fiber-optic network. It is an excellent tool for diagnosing/bypassing MOST optical system components. - Male and female fiber optic loop adapter can help you find the fault point quickly and diagnose the problem quickly. It is not only helpful for motherboard problems, but also for indicator problems, whether it is a motherboard transceiver problem or a cable connection problem. - Widely adapted: Auto diagnostic cable tool can be used to close the optic ring and bypass the useless equipment. Compatible for Brand car Audi, BMW, Mercedes, Porsche, Volkswagen etc. According to the practical application , different models can be connected simultaneously. - Package Content: 1 X male fiber optic loop adapter + 1 X female fiber optic loop adapter. - What You Get: Mellbree fiber optic loop , If there is any dissatisfaction with the product, or the parts are missing, please contact us at any time. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09KZWP19M | | Best Sellers Rank | #9,622 in Automotive ( See Top 100 in Automotive ) #71 in Code Readers & Scan Tools | | Brand | Mellbree | | Brand Name | Mellbree | | Cable Type | Fiber Optic | | Compatible Devices | Audi, BMW, Mercedes, Porsche, Volkswagen | | Compatible Phone Models | No Compatible Phone Models | | Connector Gender | Male-to-Male | | Connector Type | Optical | | Customer Package Type | protective packaging | | Customer Reviews | 4.3 out of 5 stars 642 Reviews | | Indoor Outdoor Usage | Indoor, Outdoor | | Item Shape | Round | | Item Weight | 0.01 kg | | Manufacturer | Mellbree | | Model | Mel-fol | | Model Name | Mel-fol | | Number of Items | 2 | | Other Special Features of the Product | Fiber Optic Diagnostic, Network Bypass | | Outer Material | Other | | Part Number | Mel-fol | | Recommended Uses For Product | automotive fiber-optic network diagnosis and bypass | | Special Feature | Fiber Optic Diagnostic, Network Bypass | | Specification Met | CE | | Unit Count | 2 Count | ## Product Details - **Brand:** Mellbree - **Cable Type:** Fiber Optic - **Compatible Devices:** Audi, BMW, Mercedes, Porsche, Volkswagen - **Connector Type:** Optical - **Special Feature:** Fiber Optic Diagnostic, Network Bypass ## Images ![Mellbree 2PCS Fiber Optic Bypass Loop, Female and Male Diagnostic Tool - Image 1](https://m.media-amazon.com/images/I/61Qpz4fgnVL.jpg) ## Questions & Answers **Q: Does work on a BMW 2007 335i?** A: Yes. Used this on my 09 335xi **Q: Does this work on a 2009 650i?** A: I used this link on a 2009 XF Jaguar to bypass the Navigation unit in the system... well made link and arrived ahead of projected time... John, South Island NewZealand **Q: Will this work on a 2008 BMW 536xi ?** A: As long as the system you are working on is fiber optic then yes. If a wired system then no it won’t. **Q: Does it work for a 2007 Mercedes ml 320?** A: No,at all! ## Customer Reviews ### ⭐⭐⭐⭐⭐ Satellite radio fix *by D***N on July 11, 2026* 2008 528i BMW Had intermittent audio cutout and randomly work again. This was due to the satellite tuner located in the drivers side trunk failing. I had to slightly modify the loop by popping it out if its holding clip, then zip tie it to the loop so it doesnt unplug while driving. This eliminates that satellite radio feature and does not cause any codes. ### ⭐⭐⭐⭐⭐ Just saved a bunch of money *by C***R on July 9, 2026* Just need to remove the housing and you’re good to go. Works immediately. ### ⭐⭐⭐⭐⭐ Fiber optics *by O***I on August 28, 2026* Works good but if you have a 750 Li older model like 2007 or 8 you have to take them apart to make them work but works good ## Frequently Bought Together - Mellbree 2Pcs Fiber Optic Loop, Female and Male Fiber Optic Bypass Loop Adapter Connector Diagnostic Device Tool Compatible for Benz Audi Mercedes BMW VW Porsche Most Optical System - M&P USA Universal Fiber Optic Loop Bypass Loop Adapter Compatible with BMW, Mercedes & More - Velidy 2 PCS Fiber Most Optical Optic Loop Bypass Male Female Adapter for Benz Audi Mercedes BMW VW Porsche --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/388374685-mellbree-2pcs-fiber-optic-bypass-loop-female-and-male-diagnostic](https://www.desertcart.us/products/388374685-mellbree-2pcs-fiber-optic-bypass-loop-female-and-male-diagnostic) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-10-16*