The intake manifold for BMW 2.0d N47N and N47S1 engines is a component fitted to the updated version of one of BMW’s most popular powerplants, introduced in 2011. Given the current mileage of these vehicles, this intake manifold is now among our most frequently remanufactured parts. The swirl flap mechanism in this design suffers from a characteristic, recurring pattern of wear. Below, we explain the root cause of the fault and our solution.
Remanufactured BMW N47N intake manifold
Common fault
In N47N and N47S1 engines, the swirl flaps are mounted on a shared control shaft. Over time, due to high mileage and soot accumulation, excessive play develops where the flaps attach to the shaft. As a result, the flaps begin to move freely regardless of the actuator’s position, and in extreme cases, a flap may snap off. Due to its size, a broken piece rarely enters the combustion chamber; however, the fault itself leads to a noticeable drop in engine performance.
Our solution
Our remanufacturing process utilizes an upgraded flap-to-shaft mounting design, developed specifically to eliminate the root cause of the fault rather than just its symptoms.
The remanufactured intake manifold features:
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An upgraded swirl flap-to-shaft mounting system
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Reinforced shaft bearings
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New shaft seals
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A new intake manifold gasket
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A mechanically and electrically tested actuator
Upgraded N47N swirl flap mechanism design
This solution completely eliminates the risk of recurring failures typical of the original factory design.
Fitment & application
This intake manifold is fitted to BMW 2.0d engines with codes N47N and N47S1 produced between 2011 and 2015.