Airbag control unit with part number 4416172

What is the function of Airbag Control Unit 4416172?

The airbag control unit with part number 4416172 is the central control module for the occupant safety system (SRS) in vehicles such as the Opel Vivaro. It processes data from crash sensors and is responsible for precisely deploying airbags and seatbelt pretensioners at the right moment in the event of a collision.

This component, also known as the SRS module, continuously monitors all relevant parts of the restraint system, including front, side, and head airbags, seatbelt pretensioners, and seat occupancy detection. It ensures that the system remains operational at all times and functions correctly when needed.

The microprocessors embedded in the control unit—often supplied by manufacturers like Bosch or Delphi—process incoming signals and determine whether to trigger deployment. Any system malfunction is logged and indicated by the illumination of the SRS warning light on the instrument panel.

What types of failures occur in control unit 4416172?

The most common cause of failure for control unit 4416172 is the storage of crash data following an accident. Other issues include internal electronic faults that generate specific diagnostic trouble codes, as well as communication problems over the CAN bus, which can result from electrical interference or mechanical stress.

After a crash—even one involving low impact energy—the control unit often locks out further activation and stores so‑called crash data. This lockout serves as a safety feature to prevent unintended deployments, but it renders the unit unusable until reset.

A frequent internal fault manifests as error codes such as B1111 or 93F9, indicating a problem within the internal hardware—such as the microprocessor or memory chip. These errors may also arise without an accident due to aging electronic components or voltage spikes.

Communication errors, typically recorded under code 65535 (control unit defective/no communication), point to issues with the CAN bus or power supply. Sometimes external factors—like damaged cables or connectors after seat adjustments—can also trigger such malfunctions.

Symptoms: How do you recognize a faulty control unit 4416172?

A defect in airbag control unit 4416172 almost always presents itself through a lit or flashing SRS warning light on the dashboard. Additionally, specific diagnostic trouble codes such as B1111 (control unit defective), 93F9 (internal fault), or 65535 (no communication) can be read, signaling deactivation of the entire airbag system.

The primary and unmistakable sign is the illuminated airbag indicator light (SRS lamp). It alerts the driver that the occupant protection system is either non‑functional or only partially operational. For safety reasons, the vehicle should be inspected immediately at a qualified workshop.

Using an OBD2 scanner, specific fault codes can be retrieved to pinpoint the exact nature of the issue. Codes B1111 and 93F9 directly indicate an irreparable internal hardware failure within the control unit itself, while 65535 suggests a complete loss of communication.

The most serious consequence is that airbags and seatbelt pretensioners will no longer deploy in the event of a crash. Consequently, the vehicle no longer provides full protection, posing a significant safety risk.

In which vehicles is control unit 4416172 installed?

The airbag control unit with part number 4416172 is primarily used across various model series from Opel. Notably, it appears in Opel Vivaro models, enabling targeted repairs specifically for these vehicles.

At Airbag24, we specialize in repairing this particular control unit for the following models:

Opel: Vivaro A (model years 2001–2014), Vivaro C (model years 2019 to present)

How does the repair process for control unit 4416172 work?

Repair at Airbag24 begins with a detailed analysis of the submitted control unit. Depending on the nature of the fault, crash data is professionally erased, or defective electronic components are replaced. A final test confirms full functionality, without requiring reprogramming of the vehicle’s onboard systems.

First, the control unit is removed by a certified workshop. It is crucial to disconnect the battery for at least 10 minutes to prevent accidental airbag deployment. The removed unit is then securely packaged and shipped to Airbag24.

Upon receipt, our technicians conduct a systematic diagnosis to identify the precise source of the problem. If crash data is present, it is reset using specialized software and hardware. For internal faults—such as error code 93F9—the defective electronic components, including microprocessors or memory chips, are carefully desoldered and replaced with new ones.

Following the actual repair, a comprehensive functional test is performed on a test bench. This ensures that the control unit functions just like a brand-new part. Since the original vehicle coding is preserved, the repaired unit is typically plug-and-play and can be reinstalled without time-consuming programming. We provide 2 years' statutory liability for defects on every repair.