I bought mine (2001) with 161,000 or so on the original 1zz. 164253 I think it was on mine when the engine was guzzling oil and the clutch had given up it's life and I swapped them. I don't know how the previous owner had treated it but it still had the pre-cats. I've now 4309 on a swapped 2zz and 6sp trans. I'm praying I get at least 100,000 out if it.
I had been wondering how many miles people had been able to get out of them and what are the common failure parts on higher millage cars.