Airbag control unit with part number 337644-102

What is the function of the airbag control unit 337644-102?

The airbag control unit 337644-102, manufactured by TRW, is the central control module for the occupant protection system in the Peugeot 108 I. It processes signals from crash sensors to deploy airbags and seatbelt pretensioners in the event of a collision. After activation, it stores crash data, which locks the device and necessitates repair.

As a core component of passive vehicle safety, this control unit continuously analyzes data from acceleration and yaw rate sensors. When values indicate a collision, it sends ignition pulses to the appropriate airbags and seatbelt pretensioners within milliseconds, providing optimal protection for occupants.

This module is an OEM component from TRW Automotive and is also listed under part number 89170-0H210. Its primary function is precise control of the restraint system and irreversible storage of crash events for later analysis, ensuring that the system is inspected after an accident.

What defects occur with the 337644-102?

The most common defect in the TRW control unit 337644-102 is the retention of crash data after an accident, which effectively locks the device. Other causes include internal electronic malfunctions indicated by error code 102, as well as communication issues or damage caused by external factors such as water ingress.

The retention of crash data is the primary reason for failure following an accident. This data lock is intentionally designed by the manufacturer and can only be reset through specialized electronic repair, which erases the stored data in the unit’s memory.

Another frequent issue is an internal electronic fault, often logged in the fault memory as error code 102. This indicates a hardware problem within the control unit—such as defective microcontrollers, memory chips, or other components—and prevents proper operation of the airbag system.

In addition, communication problems with the vehicle’s electrical network, software errors, or physical damage due to mechanical stress and moisture can impair the control unit’s functionality, requiring replacement or repair.

How do you recognize a defect in the 337644-102 control unit?

A defect in the 337644-102 control unit primarily manifests as a permanently or intermittently illuminated airbag warning light on the instrument cluster. Additionally, error codes—especially code 102 for internal faults—may appear and cannot be cleared. In some cases, communication with the control unit becomes impossible.

The most obvious symptom is the active airbag warning light, signaling a fault in the restraint system and indicating that airbags may fail to deploy in the event of a crash. Immediate inspection at a qualified workshop is therefore essential.

Diagnosis via the OBD interface reveals specific, non‑erasable error codes. In particular, error code 102 clearly points to an internal electronic malfunction within the control unit itself, requiring component‑level repair.

In severe cases, the control unit may completely fail, becoming unreachable through diagnostic equipment. Communication ceases entirely, complicating troubleshooting and strongly suggesting total failure of the component.

In which vehicles is the 337644-102 control unit installed?

The airbag control unit with part number 337644-102 is exclusively specified for the Peugeot 108 I model years 2014–2022. It is an original TRW‑manufactured part tailored specifically for this vehicle series. At Airbag24, we specialize in the professional repair of this particular control unit.

At Airbag24, we service the control unit with part numbers 337644-102 and the alternative number 89170-0H210 for the following model:

Peugeot 108 I (model years 2014–2022)

How does the repair of the 337644-102 proceed at Airbag24?

At Airbag24, repairing the 337644-102 involves professional diagnostics, clearing stored crash data, and fixing internal electronic faults. Upon receipt, the unit is thoroughly inspected; defective components are replaced, and the software is restored to factory settings. Two years' statutory liability for defects is provided on all repairs.

Before removal, it is recommended to read out the vehicle’s fault memory to rule out additional potential sources of trouble. Please send the securely packaged control unit along with the completed repair order.

Upon arrival at Airbag24, our technicians conduct a comprehensive incoming inspection to verify the reported fault and identify any additional possible defects, analyzing both the hardware and software of the unit.

The actual repair focuses on erasing the crash data using innovative software and fixing hardware faults, such as the defect that triggers error code 102. Defective electronic components are replaced professionally.

Following a successful repair and a final functional test, the control unit is prepared for return shipment. We provide 2 years' statutory liability for defects on every repair performed.

Is repairing the 337644-102 worth it?

Repairing the airbag control unit 337644-102 is an economically sensible alternative to an expensive new purchase, as the costs are often 30–50% lower. The unit is restored to its original condition, allowing it to be reused in the vehicle without time-consuming reprogramming. Additionally, the repair is backed by 2 years' statutory liability for defects.

The biggest advantage is the significant cost savings. A new part from the manufacturer can cost several hundred euros, whereas the repair amounts to only a fraction of that price. This makes refurbishment particularly attractive for older vehicles.

Another technical benefit is that the vehicle-specific coding remains intact in the control unit. After repair, the unit can be reinstalled without reprogramming or recalibration, saving time and additional workshop expenses.