RKX MOST fiber optic optical loop bypass MALE adapter for Radio Audio. Compatible with Mercedes BMW Audi and Porsche

Very good

I don’t generally leave Amazon reviews but I felt the need to share… I experienced fitment issues (as others here have stated) This particular bypass loop does NOT fit for BMWs. I even tried on my friends BMW just to be sure it was not just MY car. It literally fit NONE of the components in the car (I tried the TCU, AMP, and satellite radio receiver) Based on some of the other reviews here, I tried to physically cut off the plastic on the loop’s connector to get it to work for me, (by cutting off the plastic around the edges) and I wound up damaging the unit. Now that I’ve damaged It, I cannot even return it for a refund. Crazy stuff. If you are looking to address a BMW audio or SOS issue, I recommend you seek out an alternative that will actually fit! You have been warned!

If you like my review, please click on the HELPFUL button below. I only write reviews to help fellow Amazon shoppers. I am not compensated for any products, (I buy them with my own money, like many of you) and I write what I experience in order to make Amazon Reviews better for us all.I bought this for my BMW 08 335i E93 which was experiencing audio failure on a consistent basis. My research led me to believe that the Sirius sat trunk-mounted receiver was/is going bad. This is a VERY common issue on BMWs and many other cars with older Sirius sat units.In short summary, the MOST network was "broken" due to the Sirius box's failure/pending death. I needed to buy a fiber optic loop to bypass the dying unit to keep the loop alive as the Sirius unit was not passing its light/signal to the next part of the loop/chain of devices.I bought this RKX MOST loop hoping the BMW male connector would easily fit. I was wrong, the BMW connector is proprietary in size and connection.However, with a very small and simple modification to this RKX loop, I was able to bypass the dying Sirius box and keep my light-loop going, thus fixing my car's lack of audio problem.To mod this unit, and if you'll need to do the same to achieve your own success, here's what I did. Sorry for not taking pics, but here's the method and solution:Using this female adapter, I cut away all four walls (sides) on the RKX connector, leaving just the base of the unit in tact of which the base had two binocular-shape connectors molded into it.The base along with the two light tunnels/binoculars, connect directly into BMW's male MOST loop plug, giving a perfect fit of RKX-base to BMW male plug.Upon each tunnel interconnecting/mating into the male BMW connector, the MOST light loop is then "closed" so that light keep travelling in the loop to the next device in the chain.With the connection made, I then tested my car's audio and it was back to perfect. Fully functioning with zero sound degradation or loss.Upon confirming all was working, I then used a ziptie to connect the female base (RKX) unit to the BMW male plug, looping the ziptie in between the BMW wire harness to in between the RKX loop to ensure the ziptie would remain connected and the two parts mated.A gentle snugging of the ziptie and then I gently placed the new connection under/near the existing wires near the Sirius sat box to ensure they were not rubbing, or free/loose to cause further error.My car is back to working perfectly again with zero audio issues. I never subscribed to Sirius, and never would, so not having sat radio means nothing to me. I use my phone connected via AUX to stream and play content anyway.I hope this review is helpful to anyone experiencing a similar audio problem. I aggregated my research from a few different websites and videos to make this instructional post.For $14, I solved what the dealer would have charged me over $150 to diagnose and then whatever they'd want to charge to repair the issue. Chalk one up for the owner here versus the dealer. It's nice to get a cheap win now and then.

Worked as I hoped it would. I had a full audio loss, plus the SOS failure warning in my 2008 335xi, e90/N54 BMW. I did some research and found that the MOST bus may be the problem. If one unit fails (bluetooth, sat radio, TCU, amp, navigation, CD changer, etc.) they all fail. I wasn't sure about the official BMW "lollipop" and if it would fit on the MOST clip, so I read the reviews here and decided to spend the $14 to test it out.As expected, the loop I ordered did not fit on my MOST male plug. Not to worry since you can clip away the housing and leave just the fiber points. All that's left then is to unplug one component at a time, insert this loop, and test out the car. I decided to try the first component; my satellite radio module. I got lucky, and that was it. Once bypassed, the rest of my components (bluetooth, amp, TCU, I don't have navigation or a CD changer) sprang back to life, and I heard all the warning chimes return. Not bad for $14.I have attached pictures here of how I modified the loop fitting, and how I fixed it in place. The picture with the unit installed shows the faulty sat radio module in the background. The fan still worked, and I just left the non-functional sat unit there.

I have a 2013 Volvo XC70 and the satelite radio unit crapped out. Took the dealer hours to diagnose the issue (radio wouldn't turn on and buttons didn't work). He gave me the part number and said that maybe I could find a used unit, since new ones are no longer being built.After doing a lot of research, I found all I needed to do was just bypass the unit's fiberoptic connectors with this loop.Took 10 min to install and I never have to worry about it breaking. Satellite radio doesn't work, but I don't use it anyway, so it's no loss to me.

Exact fit in my 2010 Volvo S80 T6 (female adapter) to bypass unused satellite radio module that was causing battery drain issues. Drop the back seats down using lever in trunk, get in back seat area, lift up the carpet/trunk floor panel right there in the middle behind the seat. You'll see the satellite module in a metal bracket. Unplug the black power cable first and then the orange fiber optic cable. Install this on the disconnected orange fiber optic cable connector (not the module, only fits one way). You can leave the gray antenna wire connected. Beats paying over $125 for software upgrade fix at the dealership if you don't ever plan on using satellite radio. Will not affect GPS.