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Brand New Adjuster Unit E36 E46 E53 Disa Valve Repair Kit With O-Ring. Tech Note: The most common problem is the DISA valve air flap or flap driver is striped or broken causing noise and sometimes turning on the check engine light for engine running lean conditions. This rebuilt kit is designed to fix the problem without changing the complete assembly. Fits for multiple BMW models: 2001-2006 330CI 3.0L 2001-2006 330I 3.0L 2001-2005 330XI 3.0L 2001-2005 530i 3.0L 2004-2006 X3 3.0L 2001-2006 X5 3.0L 2001-2002 Z3 Coupe 3.0L 2003-2005 Z4 Roadster 3.0L.