Just to share my experience..
I own the early '07 vios.. gonna reach 150k mileage soon..
Topics which I face now (sorry, I'm not a car-enthusiast, so the phrases might be a bit laymen :
1. Car absorber (original, never changed) getting 'soft', gonna change it soon.
2. More noise now, since 7yr old car tends to have wear and tear.
3. Fuel consumption slightly degrade, not as per expected as a new car lah, of course.
4. Felt like brake caliphers slightly stuck early morning/when it's cold.. but turns out it's the power steering belting (or something), changed already and it's fine.
5. Brake wear.. err.. I changed brake pads once after 3yrs and it's still fine now.
I've never went for external workshop for servicing other than Toyota Service.. used Fully Synthetic..
Accident twice:
- one time an auntie kissed my car's behind.
- 2nd one there was a big ass lorry tyre (complete with rims) dropped in the middle of left lane, although I drove ~100km was not able to avoid.
- 3rd time is not considered an accident, but I hit a cat (or a fox) in the middle of the night on the highway.. cracked my bumper with its head..