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The Problem: The DISA valve, otherwise known as the Intake Manifold Adjuster Unit, is located on the side of the intake manifold and is a common failure on the M54 BMW engines. The failure is caused by the type of materials used in the manufacture of two of the three key valve components.
Since the only parts on the DISA valve that typically fail are the flapper valve, bell crank lever and housing seal, why replace the entire unit. Replace the failed internal parts with our upgraded parts and have a much more reliable DISA for 1/3 the cost.