They changed exhaust valves on mine. Pleased that there is no more ticking. Even more pleased that it took no oil in the last 2000km, since they did it. In the last 15000km, it took on quart per 5000km. Wonderful "coincidence", isn't it?
2007 E90 AW 323i Step | Lowered 1.25"/1" | BMW Performance Exhaust | PBX | Debadged | Scangauge II | Style 162 18" & 161 17" wheels & rear 15mm spacers