It's strange that only some cars suffer from this.
I have a very early EURO build 330i, 12/2004 production, originally used as a press car. In the 16k miles I've owned it (total 121k) I have never heard the ticking, even after a few weeks of only short 9 mile each way commutes. Though I do generally push the engine hard in the last few miles of each trip once it's warmed up.
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E90 330i SE Manual / Bilstein B12 Pro / M3 Control Arms / Performance Exhaust / CDV Delete
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