unidentified car part

thripster

Does anyone know what this is? It fell off the bottom of my 2007 Skoda Roomster. It is quite corroded...there is embossed writing on it which says:

VWAG

CZ KR1

600 120 AC

01 07

->

Still seems to run OK after this falling off but it would help me to have an idea of what has gone wrong.

I am not a car person.

Thank you.

knightstyle

Looks like a heat shield probably from over the silencer to stop the boot floor getting hot.

greyteam1959

It could also be a heat shield over the exhaust pipe where it runs under the petrol tank. 
You should really be getting it seem to.
It might even be an MOT fail.

Lorian

Check what the exhaust itself looks like too

Ayr_Rage

That level of corrosion is trying to tell you something.

fatbelly

That Skoda is making itself lighter and faster. It's evolving.

Goudy

That's not the heat shield.
 
The heat shields are usually textured to give a greater surface area.
Usually a lighter alloy and not steel,  much lighter coloured and even slightly reflective (when new).
They are moulded to the underside of the car as well, so will have lips and flat edges.

That image above is the skin of the exhaust silencer.
Exhaust silencers are usually cheep steel and double skinned as they rust from the inside and the outside.
The outer skin has rotted through and fell off.

You can see a rotten outer skin here.
Notice the heat shield, top right hand corner of the image.
Advice on a rusty exhaust : r/CarTalkUK

angrycrow

Post above beat me to it. Definitely the outer skin of the rear silencer. VAG make them out of multiple layers of steel and he outer layer eventually rusts off.

Mine started looking ropey about 5 years ago but has not fallen off yet.

If the silencer is still solid underneath and not blowing it will pass an MOT. If the remaining silencer is blowing it won't pass the MOT.