M&P USA Universal Fiber Optic Loop Bypass Loop Adapter Compatible with BMW, Mercedes & More
Condition: New
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Learn more about financing & leasing here.
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FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
Only 10 left in stock, order soon!
Arrives
Monday, May 4
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Features
- Compatible With: BMW, Mercedes, and Many More - SCROLL DOWN for more info
- Proudly made AND supported in the USA! We are here to help you diagnose your vehicle
- *USA* Product Support via TEXT or VOICE - PLEASE Contact us for help with the product, or your vehicle's SOS light or Audio Issue!
- Lifetime warranty is included on all of our products!
Compatible Devices: TCU, MULF, Amplifier, Satellite Receiver, CCC, CIC
Connector Type: MOST Female
Color: Orange
Item dimensions L x W x H: 3 x 5 x 0.5 inches
Brand: M&P USA
Compatible Devices: TCU, MULF, Amplifier, Satellite Receiver, CCC, CIC
Connector Type: MOST Female
Number of Ports: 1
Power Plug Type: No Plug
Brand: M&P USA
Model Number: 1cb80526-e151-4a5f-8fdf-048c0e4ba5b2
Manufacturer: M&P USA
Warranty Description: 1 Year
Item Dimensions: 3 x 5 x 0.5 inches
Item Weight: 7 Grams
Package Quantity: 1
Unit Count: 1.0 Count
Number of Items: 1
Color: Orange
Finish: Matte
Warranty Type: Lifetime
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, May 4
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
Got the bypass was a little skeptic on the bypass working .starting diagnostic the fiber optics system in my 2013 c300 with no audio.found the issue with the media module .once I install the bypass turn the car on I had audio I recommend this bypass
Reviewed in the United States on March 19, 2026 by jose
Immediately fixed my issue on my E60 M5. My audio stopped working, as well as Bluetooth, plus an SOS malfunction. I found a guide on troubleshooting MOST bus issues. I removed part of the liner in the left side of the trunk to expose some modules. I checked the MOST connectors on the Logic 7 Amplifier, SAT module, and TCU. There was a red light from the amp and SAT, but not the TCU. This indicates the fault is likely with the SAT module. I ordered this (after trying a different one that didn't fit), and the second I plugged it in my audio kicked on. SOS warning went away and I was able to connect to Bluetooth. Luckily, I don't use SiriusXM so I don't need the SAT module and can leave the bypass plugged in. Well this seller knows their stuff and included a zip tie with the connector. A small gesture and little detail, but it was nice to see the recognition of the issue. This is the one to buy if you need a MOST bypass adapter. Thanks!
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Reviewed in the United States on September 5, 2025 by Anthony
Easy fix on my 2007 BMW 328i wagon (E90 E91 E92 generation) for an SOS fault which causes the audio to not work. Used this to bypass the dead Sirius XM radio module in the trunk. Open the driver side hatch in the trunk, pull out the connector on the back of the Sirius XM module and pop this into the connector to link the two connector terminals (one connector terminal is lit up and the other is not lit). Done! 2 minute job if you know where to go. Even came with a zip tie to secure the loose connector now that it's no longer plugged into the back of the Sirius XM module. Highly recommend.
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Reviewed in the United States on September 4, 2025 by Gregory Chu
Worked great on our 2008 BMW X5. Needed it to close a optical loop when I removed the 6-disc DVD changer which was faulty. They were also great in responding very fast when I contacted them. Although it is more expensive that other products that do similar things I decided to go with them as they are an US supplier, supports veterans and product and service were 5 stars. Highly recommend !
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Reviewed in the United States on July 24, 2025 by Armando Almeida
after dealing with audio cutting in and out for over a year, this simple quick installation brought my audio back. dont hesitate to try it before you start replacing modules
Reviewed in the United States on February 12, 2026 by Gumer Gonzalez
Works for c300
Reviewed in the United States on November 1, 2025 by blue
I have a 2007 BMW 650i convertible. We had taken it in in 2021 for a battery drain at a local shop. They were not much help. Not sure when the sos light started. But since then we have but it on a trickle charger every time we park it. As we don’t drive it a lot has 97,000 miles. Lately the SOS light, high drain and Radio Mode were starting to really bother me. After researching I found this product. I bought here because of what I read about customer support. I tried it on my own and failed. Adam responded to me through text sending photos and instructions to test 3 units not just the SAT that I tried. He also sent a video on the third bid as it was under my rear headrest and they were tricky to get out. As it turned out the Bluetooth was the problem. I actually preferred to replace it. Sent Adam a photo of the label which he matched to a used on on EBay about $30 total. Came two day later, installed and I now have my Bluetooth paired with my iPhone and no warnings on my screen. I am saving this part in my spare tire too area. May need up still needing it one day and Adam’s help was priceless! I don’t write to many reviews but this was way above great customer service.
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Reviewed in the United States on October 26, 2025 by Golf Girl
July 10 Update I replaced the MULF-2 module, as per Adam. Everything works perfectly. Total cost is under $100. The dealer would have charged me a lot more. Excellent support over and above anything I could have expected. Original Review M&P USA provided excellent technical support which greatly exceeded my expectations. Adam, my technical support specialist was very prompt, knowledgeable and helpful. He showed me where to find faulty modules in the truck of my car, outlined steps to replace the parts and helped me order the replacement part at a very good price from eBay, By way of background, I ordered a fiber optic bypass since my 2008 BMW was showing a SOS Malfunction light. Furthermore, my Auxiliary input and phone stopped working. When I used this bypass loop to bypass the satellite radio there was no improvement. Adam helped my find another module known as MULF-2 under the spare tire. He helped me order the right part by checking the serial number of the hardware and software so that no additional programming would be needed. Bypassing this module enabled the phone to work. In order for the Aux to work, I need to replace this module. Once that is completed, I will update this review.
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Reviewed in the United States on July 5, 2022 by Goutam Shahani