A bit of (Hopefully) useful info...
This might be worth you checking guys n gals! On your downpipe there is on some cars a steel bracket which eventually starts to transfer the turbo high pitched noise through the chassis. Apparently Audi have replaced the bracket with a plastic material instead of steel. Mines a 5/4 year car, and has the plastic bracket, but this doesnt mean to say the material type is pre or post this build year! This info was given to me from a master tech friend,!
If any of you remember on certain Audi cars, Audi fitted a plastic disc to the rear calipers as customers were saying their cars sounded like a cow mooing when breaking after reversing.. strange but true. I believe the downpipe bracket is under the car and fixes to the cross member or bulkhead.... I hope this work for some of you
Most turbos sound like a kind of slightly whistling hiss, is the best description I can think of. The police siren noise sounds like a wheel bearing has gone, but links with engine power not road speed.How loud is the police siren, does turbo not always sound like that? could you hear it in every gear?
I have had the police siren noise for ages, how long on average when the noise kicks does the turbo tend to go?
RSW46, my Turbo was supposedly replaced purely from the sound it was making (whistling but not the siren noise)
Took car to Audi for a service and they picked up on the turbo noise and suggested it to be replaced, I declined but noticed it more and more especially during gear changes (off and on the power) and so decided to change in case it took out my engine and cost a hell of allot more. I was surprised Audi could detect an issue with it purely from the sound it made but still had the whistling noise, so took it back and they cnaged it again. Few days later, noticed the same noise, so took it back but they insisted it was noise from my badly worn flywheel, which I knew needed changing.
Had that changed about a week ago and still the same noise, tempted to take it back to Audi........again!
And no Limp Mode or loss of power with either turbo or the original. All based on noise!?
I would - the first two times mine was on the way out 1st time a screeching sound like brake noise whenever it cut in- later turned out to be an oil pump blockage which killed the turbo 2nd time was the owl noise so i changed it. 3rd time i had the owl noise and drove it for ages thinking it would be ok then one day i was pulling away onto a motorway and a really loud pop and the turbo went. The real issue was the car then started revving by itself and i had to stall it in 6th gear before it destroyed itself! it also completely smoke screened the motorway causing everyone to stop! embarrassed a little