You can choose many ...
* Vrrmmm
* droom droom
* Suum Soom
And on and on and on and on and on and on and on .... .... ..... ..... ..... ........
....................... etc. .................................etc. .................................................
The engine is cooling down. (or at least that's one reason for it)
The noise
engine
your car is broken
cold engine
There are a number of causes for a rattling noise that occurs in a car. These include low oil and an engine that is faulty or going out.
The engine cover is probly not tightened down. It has to be removed to get to the oil filter on that car so probly an improper re-installation.
The automatic electric antenna is retracting or trying to. It should be silent after it has fully gone down.
because the engine is still processing the oil for about 20 seconds after you turn the car off
When you can not figure out why your car makes a strange noise, you take it to a mechanic.
Muffler
A muffler is a part of a car that silences the noise of a vehicle's engine.