LEGO Speed Champions spare parts

[DannyScene]

Noticed last night a piece of my Speed Champions 812 comp has gone missing (suspect the Mrs has knocked the model and vacuumed the piece by accident) and I'd like a replacement, does anyone know how I'd go about finding out what code or name LEGO give a specific piece and how I got about ordering one?

I'm quite new to LEGO so any help would be appreciated

cheers!

[DannyScene]

Absolute legends guys thank you!!

Looks like I need 6310198, £1.65 delivered doesn't seem bad!