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Message: <blockquote data-quote="BMW9700" data-source="post: 362763" data-attributes="member: 49"><p>not sure what is the BMW design philosophy is...but the design criteria seems to lack the long term servicibility of the product..the choice  of materials used which deteriorate individually in due time to cause failure of the whole system in older cars.. a good example is the use of ABS plastic for the vanes of the water pump...an afetrmarket one is sold here with steel wanes....this should not be the case for a premium brand..unless there is another motive..the current E90s will also start their problems after 5 years and can be quite problematic as in the older E46s</p></blockquote><p></p>