Yes I did...but it says to check the air filter every 6.000km (3.700 miles) and replace if necessary. And my question is, based in your experience, when I should change it?Have you had a look in the Workshop manuals Celica, it's in there I'm sure.
Thank you, Donsy.Celica, in my experience the original air filter is not the best quality, and can certainly be improved upon once it's done a bit of work.
There are quite a few options out there so I'm not going to recommend other than the one's I have used which is either MWR or BMC.
Plugs the guys usually replace at the 3rd service I think, but many others change to Iridium plugs as soon as possible.
You have nothing to loose, and lots to gain, so if you have the $ I would say just change them now.