chrisx348

Hi guys, shame to start with a complaint but something is bugging me.. For the first 3000 miles or so my 2015 S7 was dead silent at idle (600rpm) - perfect. Now though, and not all the time, there is a subtle (but noticeable) low-frequency 'put-put-put' noise like there is a 3-cylinder motor running somewhere. Silence returns when the revs are raised a fraction, then it comes back. Tried to pinpoint where it is coming from but no luck.

I'll mention it at the first dealer visit but it's the sort of thing they will not 'get'. Anyone experience something similar? Thanks!

19hole

Mine only has 1600 miles, but it sounds pretty normal at idle to me.

Indemand

Less miles. I start by thinking bad gas as a typical suspect. This could be anything though but I hope this is an anomaly for your car.

gk1

Could be secondary air injection...it can be kinda noisey sometimes.

Indemand

So this would likely happen with changes in ambient temperature? The vehicle isn't compensating for denser air at idle? (or is, depending on your point of view)

Bkmogul

hey did you ever figure out where the noise was coming from?

hopkinsd21

What is the Audi Transmission Replacment Program? I could not find anything online about this. I am curious.