Someone with a 200 and a service manual might post up. From memory the diesel filters are part of the big service. I had read it's an entire injection system service and not cheap
Cheers
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ps. Here are just some links I found on a very quick search...
https://www.facebook.com/berrimadies...4416008268627/
1hz should be replaced at 100,000 - 120,000klms - I think these are 100 series?
https://www.turbofuelinjectionaustra...rs-HZJ75-HZJ80
but cheap enough for re-conditioned ones it seems. Unless you are mechanical there is labour of course.
I couldn't be bothered spending more time on this...Toyota are trading on a reputation from a long time ago.