BMW DISA Large Diaphragm M43TU / M44 - 11611438404

The 60.5 mm membrane is the larger of the two diaphragms in the specified BMW DISA actuator. It is used with M43TU and M44 engines, and late versions of M42, to service the diaphragm in the variable intake manifold geometry mechanism.

Vehicle Applications

• BMW 3 Series E36 (02/1993-08/2000)
• BMW 3 Series E46 saloon, Combi, Ci (04/1997-02/2002)
• BMW 5 Series E34 (05/1995-06/1996)
• BMW Z3 E36 (12/1994-06/2002)

Select the Larger Diaphragm

This DISA actuator contains two diaphragms. The product is the larger diaphragm, diameter 60.5 mm. Match the actuator references 11611438404, 11611435715 or 11611247202.

When to Inspect the DISA Mechanism

• Increased fuel consumption.
• Poor acceleration at low engine speeds.
• Noise from the intake manifold.
• Lean mixture faults associated with unmetered air.
• Uneven idle associated with unmetered air.
• Rattling or knocking from the DISA flap.
• Hesitation or loss of response during acceleration.
• Uneven idle.
• Mixture or intake-related faults.
• Unmetered air entering the intake manifold.
• A damaged DISA shaft or diaphragm.

Inspect the mechanism to confirm which component has failed; a diaphragm does not replace a damaged shaft or flap.

What Is Supplied

The larger DISA diaphragm, 60.5 mm.

Actuator References

11611438404, 11611435715, 11611247202.

Function and Repair Scope

DISA changes the intake manifold between long and short intake paths, influencing mixture formation and torque delivery across engine speeds. The diaphragm can harden and tear with age, leaving the actuator unable to operate correctly. Replacing this diaphragm services that failed component without replacing an otherwise serviceable DISA assembly.

Important Before Ordering

Compare the installed part number and physical design before ordering. The listed vehicle model alone does not identify the required DISA version.

FAQ

Does this product include both DISA diaphragms?

The actuator has two diaphragms; this product is specifically the larger 60.5 mm diaphragm.

Which actuator references should I compare?

Compare 11611438404, 11611435715 and 11611247202 with the installed DISA actuator.

Are late M42 applications mentioned?

Yes. M43TU, M44 and late versions of M42 are listed. Confirm the actuator number and larger diaphragm design.

Will a new diaphragm repair a broken DISA shaft?

The product is the diaphragm. A damaged shaft or flap needs separate assessment; do not treat every DISA fault as a diaphragm failure.

Part Number / PN

11611438404, 11611438404 11611435715 11611247202, 11611435715, 11611247202

SKU: KL11611438404.

• BMW

Returns and exchanges

Request a change-of-mind return within 14 calendar days of delivery, then send the goods within 14 calendar days of notifying us. Our voluntary return option applies to unused, uninstalled, complete goods in their original condition and packaging. Exchanges are subject to availability and agreement.

The customer pays change-of-mind return shipping. No restocking fee applies. Refunds and original delivery charges are handled under our Refund & Return Policy and applicable law.

Faulty, damaged or incorrect goods

Email contact-us@klifex.net with your order details and a description of the problem. These claims are separate from change-of-mind returns. Where we are responsible, we bear the required remedy and return costs. Installation alone does not remove mandatory defect rights.

Your legal rights

Applicable statutory rights take precedence, including EU/EEA and UK withdrawal rights and legal guarantees. Necessary inspection does not remove a statutory withdrawal right; deductions for excessive handling must reflect an actual, evidenced loss of value.

Contact us for the correct return address before shipping. Our legal address is not a return address.

Read the full Refund & Return Policy