Fix the SOS/ No Sound Issue for BMWs
Link for PRE-TRIMMED part (ready to use out of the box) :
amzn.to/3gU3AJR
Other videos skip these tips that I wanted to share! The Optical fiber loop can bypass any component and not affect the overall optical fiber network. When a node in the MOST (Media Oriented Systems Transport) fails , it also can help diagnose and find the fault point.
BMW SOS FIX No Audio Error Fix CHEAP
BMW’s are great vehicles, I absolutely love them. I’ve owned several models, all the way back to my first BMW, my beloved, estoril blue E36 M3:
estoril Blue m3
I currently drive a 2006 BMW 650i, and the car has treated me great over the years (though she is getting old now). With all cars, you need to keep up on the maintenance, and from time to time parts fail. I try and do all of the repairs and maintenance myself. However, every once in a while a problem arises requiring research on the various BMW forums to figure out a better solution than bringing it to the stealership. The BMW SOS fix just so happens to be exactly one of those problems. It is also worth mentioning that Audi, VW, and Porsche are susceptible to the very same issues.
In this case we have already done the research for you. We even took the time to make a KZfaq video illustrating the problem and solution (skip to the bottom). However, If you want to know more about the problem and solution, keep reading!
The problem:
BMWs utilize a fiber optic network called the MOST (Media Oriented Systems Transport) network. It’s based on fiber-optic technology. Although it is a very fast and efficient networking technology, it’s susceptible to breakdown if any one component in the chain goes bad. Think of it like a string of Christmas lights, if one light goes bad, the entire sting does not function. In our case if one component in the most network goes bad, the SOS light illuminates on your dashboard, and audio output will to cease to function from any device on the same network. Boom, no Sound.
Here is a picture to help illustrate how a BMW network is typically arranged:
BMW SOS fix
The Solution:
Lucky for us it is almost always the same component that fails in the BMW MOST loop, the satellite receiver. It is always the same part used to bypass a defective component: A fiber-optic MOST bypass adapter.
However, there is another problem! The typical fiber-optic MOST bypass typically found on the Internet cannot be used without user modification. Consequently, these units need to be carefully trimmed by the consumer after receiving them to make it compatible with the BMW male MOST adapter disconnected from the satellite radio receiver. Thankfully, they are now available pre-trimmed on Amazon so you can literally install it in seconds right out-of-the-box. Here is the link to the pre-trimmed part if you want to get right to the BMW SOS fix!
In our experience 90% of the time it winds up being a defective satellite receiver in older BMW’s. In other words, If you are not into listening to Satellite Radio, there’s no need to buy a new, expensive (around $1000 from the dealer) satellite receiver. Once we bypass the defective receiver with the adapter it will be grayed out in your menu as an audio input selection, and everything else will be back to normal!
This BMW SOS error light fix is a simple task (read the KZfaq comments to review the success stories), the video below shows the install in detail.
Check out the KZfaq video below and please don’t forget to subscribe on social media if you enjoyed our content. Please feel free to ask questions below (or in the KZfaq comments). I try my BEST to respond and help out my readers and viewers! Many, many more DI