Airbag control unit with part number 04671776AE

What is the function of Airbag Control Unit 04671776AE?

The Airbag Control Unit 04671776AE is the central SRS module for the Chrysler PT Cruiser. It continuously monitors the sensors of the restraint system, controls the targeted deployment of airbags and seatbelt pretensioners in the event of a crash, and stores relevant crash data that can be retrieved after an incident.

As a safety-critical component, this control unit processes signals from acceleration sensors throughout the vehicle within milliseconds. Based on this data, it determines whether and which restraint systems need to be activated to provide optimal occupant protection.

In addition to its deployment function, the module permanently records all accident-related data—known as crash data. This storage often results in permanent deactivation of the system following an incident.

What defects occur with 04671776AE?

The most common defects of the 04671776AE control unit stem from stored crash data after accidents, which trigger deactivation. Other causes include internal hardware failures due to aging, moisture, or overvoltage. These issues frequently lead to internal error messages such as fault code 65535 (control unit defective) or problems with side‑impact sensors.

A primary cause of failure is blockage caused by stored crash data. Even in rear‑end collisions without airbag deployment, the control unit may log an internal fault and cease functioning. This condition cannot be resolved simply by clearing the fault memory.

The electronics themselves can also fail. Causes are varied, ranging from damage due to moisture and corrosion on the circuit board, to defects in individual components like capacitors or microcontrollers, to broken traces or cold solder joints. Faulty wiring or damaged connectors in the vehicle can likewise impair the control unit.

How do you recognize a defect in 04671776AE?

A defect in the 04671776AE control unit typically manifests as a constantly illuminated or flashing airbag warning light (SRS light) in the instrument cluster. Often, communication with the control unit via a diagnostic tool is no longer possible, preventing both reading and clearing of the fault memory.

The most obvious symptom is the activated SRS indicator lamp. It signals a serious system fault, resulting in the airbags and seatbelt pretensioners failing to deploy in the event of a crash. Consequently, the vehicle no longer provides occupant protection.

In the workshop, the defect is often confirmed by the inability to perform diagnostics. When a technician attempts to read the fault memory, the module fails to respond—an unmistakable sign of an internal hardware failure within the control unit itself.

Additional indicators may include specific fault codes. The fault code 65535 (control unit defective) is frequently logged. Error messages related to seatbelt pretensioners or side‑impact sensors can also originate from a faulty main control unit. Occasionally, a malfunctioning speedometer illumination has been observed as an accompanying symptom.

In which vehicles is the 04671776AE control unit installed?

The Airbag Control Unit with part number 04671776AE was specifically developed for the Chrysler PT Cruiser. At Airbag24, we repair this module for both the first generation (model years 2000–2006) and the facelift model (model years 2006–2010), restoring full functionality of the safety system.

At Airbag24, professional repair services for the 04671776AE control unit are available for the following Chrysler models and series:

Chrysler: PT Cruiser First Generation (PT, 2000–2006)

Chrysler: PT Cruiser Facelift (2006–2010)

How does the repair of 04671776AE proceed at Airbag24?

After sending the removed 04671776AE control unit to Airbag24, our technicians conduct a thorough incoming inspection. The repair process includes eliminating internal hardware faults, replacing defective components, and erasing crash data. Finally, the unit is tested on a diagnostic bench and returned with 2 years’ statutory liability for defects.

Before removing the control unit, we recommend a diagnosis at a specialized workshop. This ensures that the root cause of the issue lies in the control unit itself, rather than in vehicle wiring or sensors.

Following the initial inspection, Airbag24’s mechatronics engineers perform a systematic fault analysis. Using oscilloscopes and specialized test benches, they precisely locate defective components such as capacitors, microcontrollers, or sensors.

The subsequent restoration involves replacing faulty parts and reprogramming the memory to completely and thoroughly erase stored crash data. Each repair concludes with a comprehensive simulation test to guarantee flawless operation. You receive 2 years' statutory liability for defects on all work performed.