Airbag control unit with part number 964.618.217.04

What is the function of Airbag Control Unit 964.618.217.04?

The airbag control unit with part number 964.618.217.04 is the central control module of the occupant protection system in classic Porsche models such as the 968 and 964. It processes data from acceleration sensors and, in the event of a crash, deploys the driver’s airbag and activates the seatbelt pretensioners within milliseconds.

As a component of early airbag technology from the 1990s, this control unit is responsible for monitoring and managing the entire restraint system. It ensures that passive safety systems operate correctly at the critical moment. Compared to modern systems, its technology is simple but, due to its age, prone to specific electronic faults.

Why does control unit 964.618.217.04 fail?

The most common causes of failure for control unit 964.618.217.04 are aging electronic components, permanently stored crash data after an accident, and general electronic malfunctions on the circuit board. These defects render the system inoperable and trigger the airbag warning light.

A typical issue is the storage of crash data that cannot be erased using standard workshop diagnostic tools after deployment. The control unit then becomes internally locked.

In addition, hardware defects may occur on the circuit board, leading to loss of the programmed Vehicle Identification Number (VIN) or error messages related to connected sensors—even when those sensors are functioning properly. A related part number found in similar models is 964.618.217.03.

How can you recognize a defect in the control unit?

The clearest symptom is a continuously or intermittently illuminated airbag or SRS warning light on the instrument cluster. Often, communication with the control unit via diagnostic tools such as Bosch or Gutmann testers becomes impossible. Error codes cannot be cleared even after the underlying cause has been resolved.

Another clear indication is when the diagnostic tool reports an internal control unit fault or the VIN stored in the device has disappeared. This directly points to a malfunction in the control electronics.

An important safety note: Attempting to manipulate the system with simulators, resistors, or other bypass methods is life‑threatening. Such interventions disable the safety system and result in immediate revocation of the vehicle’s operating permit. Diagnosis and repair should only be performed by trained professionals.

In which vehicles is control unit 964.618.217.04 installed?

Control unit 964.618.217.04 is primarily found in classic Porsche models from the early 1990s. These include the Porsche 968 coupé and convertible, the Porsche 964 series (911), the Porsche 928, and the Porsche 944. Compatibility extends across the later development stages of the Transaxle series.

At Airbag24, we repair this control unit for the following models:

Porsche 968 Coupé (1991–1995)

Additionally, according to technical specifications, this control unit is also used in other models such as the Porsche 964, 928, and 944. For precise identification, always verify the part number directly from the label on the housing.

How is control unit 964.618.217.04 professionally repaired?

Professional repair at Airbag24 restores full functionality to the original control unit. The process includes diagnosing the electronics, erasing crash data, repairing hardware defects on the circuit board, and conducting a final functional test. This ensures complete compatibility with your vehicle.

The procedure begins with the proper removal of the control unit from the vehicle. After sending it to Airbag24, our technicians perform a detailed analysis to determine the exact cause of the fault. This may involve fixing circuit board issues or replacing defective electronic components.

A key step is safely resetting the device, particularly erasing stored crash data. Following successful repair, the control unit is tested and can be reinstalled in the vehicle. Often, after reinstallation, it is necessary to clear the vehicle’s fault memory. All repairs come with 2 years' statutory liability for defects.

What are the benefits of repair?

Repairing the original control unit is the most cost‑effective and safest solution. Compared to hard-to‑obtain new parts or used units with unclear histories—priced anywhere from €300 to €990—you save significantly. Moreover, full compatibility with your vehicle is guaranteed.

A refurbished original part ensures that all vehicle-specific data is preserved and eliminates the need for complicated coding or re-learning procedures. You receive a fully functional component that has been rigorously tested for reliability and is covered by our warranty.