I bought a 2006 Scion tC just over 6 months ago. Lately I been doing a lot of maintenance work so I can try and have this car running smooth for a long time. Car has about 127,000 miles on it and so far I alone have done: Tune up, brake pads, cleaned mass air flow sensor, cleaned throttle body, reset the ecu, cleaned filters, oil changes of course. What are some other things you guys recommend cleaning or doing maintenance on? Plan on doing a seafoam treatment here soon. Car runs pretty good, had a tad rough idle before so one reason I am doing all these things.

 

Well here's one that's not commonly referenced; changing the cabin air filter. If the suspension is noising, perhaps changing the bushings? I know of several tC1s, mine included, that have gotten noisier and noisier as the years went on...always coming from rear suspension area

 

pcv valve is missed a lot.