What does this coaxial cable do?

[Qmulus]

Originally Posted by The Radium King

argh, i hear you. had the seats and carpet out to fix the little hose that runs washer fluid to the rear hatch, replaced the two front suspension airbags, just got the compressor repair kit in the mail to fix that, replaced one door lock mechanism because of a sticky door switch (two more to go ...) flushed the heater core but have to have another go at that to get the heater working better, have an exhaust gas temperature sensor to jumper, replaced two injectors, two front axles, the g65 sensor is throwing a code (hoping just need to top up refigerant) and also getting a transmission gear sensor code that everyone in the audi internet world seems to get and no-one has a soln for. nice car though.

You can replace the microswitches in the door latch mechanisms so you don't have to replace the whole mechanism. You can get the correct sealed switches with the integrated wires from a few sources. These are actually pretty much the same as those on Boxsters, which are actually identical to the latches used on Audi TTs.

If at all possible, do NOT use Chinese axles (FEQ, URO, etc.). They don't last and are not rebuildable. OE rebuilds are a bit more, but last and are rebuildable. If you just need boots, don't fall into the trap of getting a replacement Chinese axle just because it doesn't cost much more or may even be cheaper. Lots of shops did this, and now are having them fail like mad and have to spend big $$$ to get new OE axles or will be replacing them multiple times due to vibration or just plain failure.

You cannot simply jumper out a defective EGT sensor. They need to put out the right frequency or the ECU will be unhappy. I am working on replacement internal circuit boards for the EGT sensors to replaced failed OE boards. As you know the EGT sensors are $$$, but a replacement board should be reasonable. You can also get the EGT sensors coded out in the software, but that is not a great idea IMO.

Is the code you are getting for "Incorrect gear ratio"? If so, there is a solution, but it is not what people want to hear.

All normal Allroad/C5/2.7T stuff. How are your upper and lower forward control arms?

Hmmm, maybe we should take this to PM.