Aibu to ask what this is on my car?

[Unhappyvegan]

I've no idea. Pic 1 is it in position as found and pic 2 is it on its own. There's no wires or clips to suggest it should be attached!

Is it a tracker? Should I be worried? Is the cat going to explode?

Why do people keep talking about cats? I’m missing something

Yes. Probably parts of the exploding cat ... quick ... duck (not exploding).

Is the cat going to explode? OMG that is the funniest thing I've read today!

LucaFritz are you OK hun?

Or maybe always bad tempered?

How weird, why is there a pest deterrent in there?!
Glad you've figured out what it is though.

You've obviously not had the misfortune of your engine being chewed blessed.....

There is, literally, no question that MN cannot answer, no matter how niche!

This is the First Rule on MN - closely followed by the second rule - there is always some pompous smug bellend who has their arse handed to them when they are, inevitably and pleasingly, wrong

The third rule is that a million MNers won't RTFT and tell you its a tracker for the next few hours...

WeBuiltCisCityOnSexistRoles 😁

My friend has just paid out several hundred pounds and been without her car for a week due to mice chewing through the wires. She doesn’t live rurally either but in an urban street.