Airbag control unit with part number 19115476

What is the Airbag Control Unit 19115476?

The airbag control unit with part number 19115476 is the central control module for the passive safety system (SRS) in the second-generation Chevrolet Colorado (2012–2022). It is responsible for evaluating signals from crash sensors and precisely activating the airbags and seatbelt pretensioners in the event of a collision.

As the “brain” of the restraint system, this module continuously monitors all connected components—such as sensors, airbag modules, and seatbelt pretensioners—for proper operation. It ensures that the system responds reliably in an emergency.

The control unit is a safety-critical component whose correct functioning is essential for vehicle registration and occupant protection. A failure will disable the entire SRS.

Why does the control unit 19115476 fail?

The most common cause of failure for control unit 19115476 is the storage of crash data after an airbag or seatbelt pretensioner deployment that cannot be cleared. Other causes include internal hardware defects in electronic components, communication issues on the CAN bus, or damage caused by external factors such as overvoltage.

Following a crash, the system locks the control unit. The stored crash data (“hard codes”) cannot be erased using conventional diagnostic tools, making repair or replacement unavoidable.

Internal faults are also a typical cause. Defects on the circuit board—such as those affecting microcontrollers, capacitors, or sensors—lead to malfunctions signaled by error codes like U1XXX or B1XXX.

Specifically for the Chevrolet Colorado, error codes such as B0066 or B0065 indicate problems with the slip ring resistance or other internal defects, requiring targeted electronic repairs.

Communication errors, where diagnostic tools like TECH2 or BOSCH testers cannot establish a connection to the module, also point to a defect. Possible causes include corroded pins or issues on the CAN bus. Damage resulting from reverse polarity during jump-starts or water ingress are additional potential failure modes.

How do you recognize a fault in control unit 19115476?

A fault in control unit 19115476 almost always manifests as a permanently illuminated or flashing airbag warning light on the instrument cluster. Additional clear symptoms include persistent error codes in the fault memory that cannot be cleared, as well as a complete loss of communication with the control unit during diagnostics.

The most obvious sign is the active SRS warning light. It fails to extinguish after starting the vehicle, signaling to the driver a critical fault in the restraint system that compromises safety.

In the workshop, the fault often becomes apparent when the control unit no longer responds to diagnostic requests. The message “No communication with control unit” via the OBD port is a clear indication of a severe internal malfunction.

If error codes can be read, they typically cannot be permanently cleared in case of a fault. Messages such as “Control unit defective” or specific codes like B0066 reappear immediately, confirming a hardware issue within the module.

In which vehicles is control unit 19115476 installed?

The airbag control unit with part number 19115476 was specifically developed for Chevrolet vehicles. It is primarily used in the second generation of the Chevrolet Colorado pickup model, produced between 2012 and 2022.

At Airbag24, we professionally repair control unit 19115476 for the following vehicle model:

Chevrolet Colorado (2nd Generation, model years 2012–2022)

Is repairing 19115476 worthwhile?

Yes, repairing control unit 19115476 is both economically and technically sensible. It can save up to 80% compared to purchasing a new unit, which often costs over €300. Additionally, the repaired unit is ready for immediate installation and comes with 2 years' statutory liability for defects.

The biggest advantage lies in significant cost savings. Rather than buying an expensive new part, the existing electronics are carefully refurbished, substantially reducing expenses.

Since the original vehicle coding remains intact, the repaired control unit is “plug-and-play.” After installation, it does not require time-consuming reprogramming at an authorized service center, saving both money and time.

Repairing the unit is also an environmentally friendly alternative. It prevents electronic waste and conserves resources, as a fully functional component is restored instead of being discarded.

How does the repair of control unit 19115476 proceed?

Professional repair begins with removing the control unit from your vehicle and sending it to Airbag24. Our technicians perform a precise diagnosis, erase crash data, replace defective components, and subject the module to a final test. The refurbished control unit is then returned to you with 2 years' statutory liability for defects.

First, the faulty control unit—typically located beneath the center console or the driver’s seat—must be carefully removed. It is then securely packaged and shipped to Airbag24.

At Airbag24, the device is analyzed using specialized measurement tools such as oscilloscopes to pinpoint the exact source of the fault. Depending on the issue, crash data and hard codes are professionally erased, or defective electronic components like microcontrollers or capacitors on the circuit board are replaced.

Following successful repair, each control unit undergoes a comprehensive functional test to ensure flawless operation. The unit is returned ready for installation, backed by 2 years' statutory liability for defects.