The next BMW 5-series will abandon the part-aluminum construction of the current model in favor of an all-steel chassis when it is launched next year, Autocar has discovered.
The change is being made for reasons of cost and ease of manufacture. The 5-series uses an aluminium space frame front end, bonded and riveted to a steel rear. It was developed to provide better weight distribution and to cut weight.
But a key BMW insider said that the aluminum structure has proved to be too costly and hard to build in large volumes.
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