Quote:
Originally Posted by Love The Drive
You are shedding some light on the other side of the story. I'm in the same boat with 2011 328i, N51 manual, with 180k miles on it and all original coolant parts as well. Water pump, fuel pump, and thermostat all still original. Oh yes, still original clutch too.
Everything has an expected life. Have to replace most of the rubber/plastic parts eventually. Some of us are more fortunate than others, but if you plan on keeping your vehicle for the long haul then there is no way around maintenance in the end.
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I think a lot of it has to do with heat cycles/environment. My Jeep XJ I owned had 200k and each cooling system component had been replaced by 100k, some twice by 200k. Those things run super hot (could bake a tray of cookies on the hood) so anything plastic or rubber became brittle.