You forgot one very important part. The washer that goes on the drain plug. If not replaced you could have a small leak.
Totoya has them and they are made of either copper or some other soft material. But the ones I get from Toyata are black. Most people miss this 1 tiny crucial piece .
Always refer to a Toyota manual before getting information on the internet. Even though this was very informative, you should always double check from the dealer or a reputable Mechanic.