Rein BMW DISA Valve / Intake Manifold Adjusting Unit — 11617544806

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 part of the variable-length intake manifold system used to optimize engine performance throughout the RPM range. Rather than relying on a fixed intake runner length, the DISA valve changes the effective intake path based on engine operating conditions.

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

After years of mileage and heat cycles, the original DISA assembly can wear or fail. A worn valve can cause drivability problems, vacuum leaks, and excessive noise from the intake manifold area.

Product Details

• Manufactured by Rein Automotive
• Complete DISA / Intake Manifold Adjusting Unit
• Direct replacement for the original BMW assembly
• Restores proper variable intake runner operation
• Helps restore low-RPM torque and high-RPM airflow
• Replacement for a worn, noisy, or failed DISA valve
• Designed for applicable BMW M54 2.2L and 2.5L engines

Replaces BMW Part Numbers

• 11617544806
• 11617502269

BMW 11617544806 supersedes the earlier 11617502269 intake manifold adjusting unit.

What Does the DISA Valve Do?

An intake manifold designed strictly for maximum high-RPM airflow won't necessarily provide the best low-RPM torque. BMW's DISA system helps provide the benefits of both.

At lower RPM, the DISA system changes the intake manifold configuration to create an effectively longer intake runner, helping improve cylinder filling and low-end torque.

As engine speed increases, the valve changes position to create a shorter effective intake path, allowing the engine to breathe more efficiently at higher RPM.

The result is a broader, smoother powerband from BMW's naturally aspirated inline-six engines.

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 buzzing noises from the intake manifold
• Inconsistent engine performance
• Poor throttle response

If your BMW has developed an unusual rattle around the intake manifold, the DISA valve should be inspected. Wear can develop in the internal flap, pivot, and actuator components over time.

Why Replace the Complete DISA Valve?

The DISA assembly contains several moving components that operate continuously as engine speed and load change. Years of engine heat, vibration, and constant operation can cause wear throughout the assembly.

Replacing the complete DISA valve provides a straightforward solution for a worn or failed original unit and restores the intake manifold's ability to properly alter runner length.

Rein Automotive Replacement

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

It provides a direct replacement for the original BMW intake manifold adjusting unit without requiring modification to the intake manifold.

Fitment Guide

This Rein DISA valve replaces BMW 11617544806 / 11617502269 and is designed for applicable BMW models equipped primarily with M54B22 and M54B25 inline-six engines.

*Primarily non-US-market applications. Model availability varies by market.

Engine Fitment

Designed for applicable versions of:

• M54B22 — 2.2L Inline-6
• M54B25 — 2.5L Inline-6

Important 325i / 325Ci Fitment Note

BMW offered certain later E46 325 models in the United States with the M56 SULEV engine rather than the standard M54B25.

Those vehicles can use a different DISA valve, so do not order based solely on the "325i" or "325Ci" badge.

If you have a SULEV-equipped E46, verify your engine code and the BMW part number on the original DISA assembly before ordering.

2.5L vs. 3.0L DISA Valve

BMW used different DISA assemblies depending on engine configuration.

This listing replaces BMW:

11617544806 / 11617502269

and is intended primarily for M54B22 and M54B25 applications.

The larger M54B30 3.0L engine found in vehicles such as the E46 330i, E39/E60 530i, X5 3.0i, X3 3.0i, and Z4 3.0i uses a different DISA valve.

Verify your engine displacement or original BMW part number before ordering.

Restore Your Intake System

A worn DISA valve can make an otherwise healthy M54 feel sluggish, rough, or inconsistent, especially at lower engine speeds where proper intake runner control is important for torque production.

If your BMW is experiencing hesitation, rough idle, lean codes, poor low-end torque, or rattling from the intake manifold, the DISA valve should be inspected.

Replacing a worn original assembly with this Rein Automotive DISA Valve restores proper variable intake manifold operation and helps your BMW deliver the smooth, broad powerband it was designed to have.