Airbag control unit with part number 15745359

What is the function of Airbag Control Unit 15745359?

The Airbag Control Unit 15745359, a GM/Delco component, serves as the central controller for the Safety Restraint System (SRS/SDM). It processes data from crash sensors to precisely deploy airbags and seatbelt pretensioners in the event of an accident. Additionally, it continuously monitors all system components and stores fault codes along with non-erasable crash data in its internal memory.

As the brain of the entire SRS system, this control unit makes split-second decisions on whether to trigger deployment. It interprets information from acceleration sensors and, via specialized squib drivers, initiates the pyrotechnic charges in airbags and seatbelt pretensioners.

Inside the module resides a microcontroller equipped with flash or EEPROM memory for vehicle configuration and event data. A stable power supply and interfaces for communication with the rest of the vehicle ensure reliable operation. The control unit stores both temporary faults and permanent crash data resulting from deployments.

Why does Control Unit 15745359 fail?

The most common issue with Control Unit 15745359 is the storage of crash data after an accident, which permanently locks the unit and activates the SRS warning light. Other internal electronic failures include defective memory chips (EEPROM), cold solder joints on voltage regulators, or malfunctioning squib drivers, leading to error codes such as “B10xx/B11xx – Internal Control Unit Fault.”

Following a crash, crash data is permanently stored in memory—a manufacturer‑imposed safety measure designed to compel a full system check. This lock cannot be cleared by standard diagnostic tools and requires specialized electronic intervention to selectively reset the data.

Internal control unit malfunctions often result from aging electronic components. Cold solder joints, a faulty voltage regulator, or a damaged memory chip can cause communication failures or internal error messages. Workshops frequently diagnose these issues as irreparable damage, even though targeted electronic repair is possible.

It is crucial to inspect the vehicle’s peripheral systems before repairing the control unit. Defective cables, corroded connectors (e.g., under the seats), or faulty sensors can also trigger SRS errors—even if the control unit itself remains intact. Thorough diagnostics are therefore essential.

How do you recognize a failure in Control Unit 15745359?

A defect in Airbag Control Unit 15745359 primarily manifests as the SRS or Airbag warning light remaining constantly illuminated on the instrument cluster. Often, fault codes—especially after an accident—cannot be cleared using a diagnostic tool. In some cases, communication with the control unit may also become impossible.

The most obvious symptom is the persistently lit airbag warning light. Unlike normal operation, it does not extinguish upon starting the vehicle, indicating an active, safety‑critical system error.

During workshop diagnostics, the problem frequently appears as fault codes like “Crash Data Stored” or “Internal Control Unit Error” that remain unremovable. The system stays locked until the root cause within the control unit is resolved.

Another sign of a severe internal fault is complete loss of communication. The control unit becomes unreachable via the diagnostic port, making vehicle‑level fault analysis impossible.

In which vehicles is Control Unit 15745359 installed?

The GM/Delco Airbag Control Unit with part number 15745359 was specifically developed for the first-generation Chevrolet Astro. Airbag24 specializes in professionally repairing this module for models produced between 1985 and 1994, restoring full functionality to the safety system.

At Airbag24, we service part number 15745359 for the following model:

Chevrolet Astro, First Generation (1985–1994)

How does repair work at Airbag24?

Repair of Control Unit 15745359 at Airbag24 involves precise electronic refurbishment. Upon receipt, the internal memory (EEPROM/Flash) is read out, crash data is professionally erased, and the dataset is cleaned up. For internal faults, defective components such as voltage regulators or memory chips are replaced. Repairs come with a 12‑month warranty.

Before removal, workshops should verify that the root cause lies in the control unit itself rather than in the vehicle’s wiring or sensors. Following diagnosis, the control unit is carefully removed and shipped to us.

At Airbag24, the housing is carefully opened and the circuit board is thoroughly analyzed. Using specialized programming tools, our technicians extract the memory contents. Crash data is selectively erased while the vehicle-specific configuration, such as the VIN, remains intact. In cases of hardware failures, defective components are identified and replaced with new, high-quality parts.

Following successful repair and final testing, the control unit is sealed and returned to you. It can then be reinstalled in your vehicle. Typically, no re‑coding is required. The repair comes with a 12‑month warranty.

What shipping options are available?

For sending your control unit to Airbag24, you can choose free shipping or arrange for UPS pickup. Returns are also handled free of charge via UPS Standard. For faster delivery, various UPS Express services—including cash on delivery—are available as optional extras.

We provide a free shipping label for sending your removed control unit back to us. Alternatively, you can book a convenient UPS pickup at your preferred location or drop off the unit in person at our facility.

The return shipment of the repaired unit is free of charge via UPS Standard (1–3 business days). If you need it sooner, we offer UPS Express (1–2 business days) for an additional fee. Both shipping methods can be arranged with cash on delivery if desired. Local self‑pickup is also an option.