Front left tyre got punctured while driving today. There was audible air leaking at rest. Went to a tyre shop and the salesman said I should have all four tyres replaced.
My first car - Mazda 3 bought brand new with factory tyres in Jan 2020. Driven 20K km so far. There's still a decent amount of tread left. From my limited knowledge, I thought only the punctured tyre needed to be replaced seeing as the other 3 still have a decent amount of life left in them. I do notice some minor skidding when wet or around sharp corners but otherwise no issues.
Do I need to have all 4 of my tyres replaced? - If I only have one replaced now, does that mean when the other 3 eventually wear out I need to replace all 4 then or just those 3.