What are Swirl Flaps?
What are BMW swirl flaps? Swirl flaps are one of BMW’s biggest design mistakes… This causes 1000’s of owners throughout the world either very expensive repairs or even vehicles being written off. The flaps live in the inlet manifold of BMW diesel M47TU & M57TU engines (either 4 or 6 flaps depending on the amount of cylinders). These values…
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