how many quarters of trans fluid should I put in a Toyota corolla 2003?
Usually 3-4 with a filter change, more if you are flushing the entire system.
I don't think the transmission would like it if you put quarters in it. As for total trans fluid replacement, I dont know for sure but 8 quarts would be my guess. If you are just dropping the pan to change the filter then you would need a lot less.
It will probably state the quantity and type of fluid in your owner's manual. I suggest you read it.
Looking for a Used Corolla in your area?
CarGurus has 59,960 nationwide Corolla listings starting at $850.
Search Toyota Corolla Questions
Toyota Corolla Experts
Related Models For Sale
Used Cars For Sale