Rein BMW DISA Valve / Intake Manifold Adjusting Unit — 11617544805

Restore proper intake manifold operation, low-end torque, and smooth engine performance with a Rein Automotive DISA Valve Replacement.

BMW's DISA valve, short for Differential Intake Air Control, is a variable-length intake manifold system designed to help the engine produce the best possible power and torque throughout the RPM range. At lower engine speeds, the DISA system effectively creates a longer intake runner path to improve low-end torque. As engine speed increases, the valve changes position to create a shorter intake path for improved airflow and top-end power.

Like many moving components in the intake system, the DISA valve can wear out over time. A failing valve can cause drivability problems, intake leaks, and excessive noise from the engine bay. In severe cases, internal components of a damaged DISA assembly can come loose, making replacement important when failure is detected.

Product Details

• Manufactured by Rein Automotive
• Complete DISA / intake manifold adjusting unit
• Direct replacement for the original BMW unit
• Restores proper variable intake runner operation
• Helps restore low-RPM torque and high-RPM airflow
• Replacement for a worn, noisy, or failed DISA valve
  

Replaces BMW Part Numbers

• 11617544805
• 11617502275

BMW 11617544805 supersedes the earlier 11617502275 adjuster unit.

What Does the DISA Valve Do?

BMW designed the intake manifold to work efficiently across a wide range of engine speeds. An intake runner length that works well at low RPM isn't necessarily ideal at high RPM, so the DISA system allows the effective intake path to change as the engine operates.

At lower RPM, the system utilizes a longer intake path to help improve air velocity and low-end torque. At higher engine speeds, the DISA changes position to alter the intake path and improve airflow for upper-RPM power.

When everything is working correctly, the change happens automatically and helps give BMW's inline-six engines their broad, smooth power delivery.

Common Symptoms of a Failed DISA Valve

A worn or failed DISA valve can cause:

• Hesitation at low RPM
• Loss of low-end torque
• Rough or unstable idle
• Lean-condition fault codes
• Intake-related vacuum leaks
• Rattling or other loud noises from the engine bay
• Inconsistent engine performance

A particularly loud rattling DISA should not be ignored. The internal flap and pivot components can wear, and failure of these components can potentially allow pieces to enter the intake tract.

Rein Automotive Replacement

This replacement DISA valve is manufactured by Rein Automotive, a specialist in replacement components for European vehicles.

Rather than attempting to repair a heavily worn original unit, replacing the complete DISA assembly provides a straightforward way to restore proper operation of the variable-length intake system.

Fitment Guide

Important: BMW 11617544805 / 11617502275 is primarily the large DISA valve used on M54 3.0L applications and certain M56 SULEV 2.5L applications. It should not be assumed to fit every M54-powered 325i/325Ci. For example, the 325i/325Ci applications for this specific part are identified as M56 SULEV applications in BMW/Rein fitment data.

These applications are supported by BMW catalog and Rein fitment information for 11617544805.

Important Fitment Note

The model list provided for this part can sometimes be misleading because BMW used different DISA valves depending on engine displacement and engine version.

For this specific Rein replacement of BMW 11617544805 / 11617502275, verified applications center on the M54B30 3.0L engine along with specific M56 SULEV 2.5L applications.

Models such as the 545i, 645Ci, 745i, 745Li, and Alpina B7 use different engine families and should not be included in the fitment table for this specific Rein DISA valve solely because a generic catalog lists an "intake manifold actuator."

Verify the BMW part number on your original DISA valve or confirm your engine before ordering.

Restore Your Intake System

A worn DISA valve can make an otherwise healthy BMW feel sluggish, inconsistent, or rough at lower engine speeds. If you're experiencing hesitation, rough idle, lean codes, loss of low-end torque, or a loud rattle from the DISA area, replacing the worn unit can restore proper variable intake manifold operation.

With a complete Rein replacement DISA valve, you can replace the aging assembly rather than relying on a worn original unit.