RKX MOST fiber optic optical loop bypass Female Adapter for radio and audio compatible with Mercedes, BMW, Audi, Porsche and Volvo

Well worth the price for troubleshooting and as a repair solution too. Of reasonable quality so long as the cable is not abused (tugged on tor pinched).This "lollipot" MAST loop helped me easily identify the bad module in my 2013 Audi Allroad and get the MMI going again. It's installed temporarily, keeping the MMI functioning until I receive and install the replacement Sirius radio module (coming from another mail order supplier).

SOLVED my battery drain issue with my 2008 Volvo c70. After some forum searching I found that this is what is needed for my issue. Most likely works with most Volvos of that era so do a little research and it'll probably lead you here ...

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.

Resolved the issue I was having with my 2008 Mercedes E350

I had to modify the plug, but I knew going into it that I had to do that but it was easy. Once I cut the plug, the wire matched up like a glove.I was able to resolve all my dashboard issue with a simple cable.It was awesome.

Outstanding saves time and money

Will not work on most BMWs without modifications. This cannot be used on late E-series BMWs to bypass MOST units (like amplifier, tuner, satellite tuner) as the female socket is not the right type. If you are willing to carefully saw off the square enclosure so that the optical cable still remains in the black backing with the black cylinders intact, then you can plug it into the car-side connectors (but only good will is going to hold them in, unless you want to cable tie). Having said that, once I did the modification, it helped me debug the system.

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!