I've had two bmw e39's with a m57 engines, and these chains last literally forever. One of my engines has over 500k clocked on it, no chain rattle still. Buuuu

I've had two bmw e39's with a m57 engines, and these chains last literally forever. One of my engines has over 500k clocked on it, no chain rattle still. Buuuuut, there's also modern Opel engines where timing chain is guaranteed to kill the engine if not replaced every 100k km. So it really depends on the engine rather being simple chain vs belt.