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					Originally Posted by landrovered  If the German Porsche engineers thought that the IMS was a major defect they would have changed the design in a millisecond and not kept it though the transition from 986/996 to 987/997.  | 
	
 
If this was a known failure after the manufacture of the engine and it did fail during r&d testing then these failures would have been calculated into the production costs. A cetain failure rate is expected by all manufacturers of most products. How they deal with said failures ia a different matter entirley.