Besides oil changes, are there any other regular maintenance tasks I should be aware of? I read somewhere that battery fluid might be something to keep an eye on. Is that something that gets replaced often? And is there anything special I should do to maintain the battery?
You might find this resource helpful. It gives a detailed breakdown of maintenance depending on mileage, starting on page 38: https://assets.sia.toyota.com/publications/en/omms-s/T-MMS-21SiennaHV/pdf/T-MMS-21SiennaHV.pdf
@Flippa
This is great! Thank you!