Has anyone had luck getting the exhaust note back to sound quality you had prior to the O2 sensor campaign?

I've asked my dealer as recently as 2 weeks ago and was told another update has not been made available from Jaguar to address this. I brought their attention to several TSB's I read about on these forums but they insist I have the latest update and they acknowledge it reduces exhaust sound level and acceleration for engine protection from carbon buildup.

But then again I keep reading there is a fix. What is the real truth regarding this?

 

There is only one TSB, not several. I lost all pops and crackles after K309 and regained them all again after the TSB was applied.

Have you quoted them the exact TSB #?