Exhaust and O2 Sensor Issue

[Etienn_A3_2.0_FSI]

Good day

I need assistance.
My A3 is having an issue.

Couple of months ago, I had the middle Cat Converter removed As it was damaged and rattling.

I believe when it was done, they also my sensors to compansate, But it had the opposite affect. Been havving driving issues since. I went back, but they refused to admit they did anything wrong, and told me nothing they did could be causing this issue.

The Audi Manual shows, Attached image, it should be before and after the middle Cat. My Sensor 2 & 4 are Not there anymore. But I cannot proove that they Moved my sensors, And I cannot fix my car, as I can't find any other faults.
So before I remap, or replace sensors, and untill I can Proove that Other A3's sensors are located as per the Audi Manual, I am stuck.

So... I need
Specifically the 2.0FSI 2004 2 Door ambition MODEL.
A Photo of your Exhaust. SPECIFICALLY the middle part showing sensor Locations...
Please. A Photo or 2 Will realy help me in fixing my car.

Please please please Help me....

Thank you

 

[Etienn_A3_2.0_FSI]

Hello
Please Anyone ???

 

[prt57]

It is difficult to understand what has happened. Please read your text again and update making things clearer.
Maybe a photo showing your exhaust will help.