Intake Manifold Adjusting Unit (DISA Valve), Rein - E46 330i, E39 530i, X3, Z3, Z4
OEM-quality replacement DISA valve to restore torque and performance, # 11617544805
This is the DISA valve located in the intake manifold of the M54 engine in the E46 330i, E39 530i, 2004-2005 E60 530i, Z3 3.0i, and 2003-2005 Z4 3.0i. This also fits E46 325i but only with the M56 SULEV engine spec. DISA is "Differential Intake Air Control", also known as variable length intake runners. It's a flap system that redirects the intake air inside the manifold depending on load and RPM. At low RPM the flap is closed which helps boost low and mid-range torque. At high RPM the flap is open all the way which provides the most air volume for high RPM power. A faulty DISA valve will cause the engine to feel sluggish or unresponsive in the low-mid RPM. There is no fault code for the DISA valve itself, although several related faults and check engine lights may be traced back to it - fuel trim, misfires, lean condition, and fuel mixture. There may also be a clicking sound from the driver's side of the engine bay as the DISA solenoid tries to operate the butterfly flap. The o-ring seal on the outside of the valve body can also fail and lead to vacuum leaks.
This is an OEM DISA valve manufactured by Rein Automotive - an original supplier to BMW for many engine components. As an OEM it meets all of BMW's original design, fitment, and performance requirements and is TUV approved. OEM parts are the best alternative to more expensive Original BMW parts because they are virtually identical without the inflated price tag. This part has a two year warranty.
E46 (99-05) > 325i
E46 (99-05) > 330Ci
E46 (99-05) > 330i
E46 (99-05) > 330xi
E39 (97-03) > 530i
E60 / E61 (04-10) > 530i M54 (2004-2005)
E83 X3 (04-10) > X3 3.0i M54 (2003-2006)
E53 X5 (00-06) > X5 3.0i M54
E36/7 / E36/8 Z3 (96-02) > Z3 3.0
E85 / E86 Z4 (03-08) > Z4 3.0i M54