There is no rule for this: BLS in Skoda had DPFs in Caddy for the Polish market - no.
If the engine is still the whole thing, do only as much as you need to: dismantle and replace the set of bushings, surely and the shaft grinding will be required, from poverty you will insert the second stimulant. This post is replaced as soon as the hoof is exposed.
The fact is that these engines were killed by the idle LongLife interval, but also unfortunately material changes. Axx series engines (that is, until 2004) were armored. Unfortunately, the Bxx series had many elements made of shit (like bushings or shafts).
But renovate - do not replace. Even if you finally get the same amount of money as the replacement, because you always know what you have, you know what was inserted, how it was done and changing the oil every 10, up to 15 thousand km, you will fly hundreds of thousands of kilometers. A drug is always a lottery because you have no guarantee that you have not bought in a similar or worse condition than what you currently have.