Airbag control unit with part number Q0008768V00

What is the function of the airbag control unit Q0008768V00?

The airbag control unit Q0008768V00, also known as the SRS Control Unit, is the central control module for the occupant protection system in the Smart Roadster C452. It processes signals from impact sensors and determines whether to deploy airbags and seatbelt pretensioners, ensuring the safety of vehicle occupants in the event of a crash.

As a safety-critical component, this control unit continuously monitors all elements of the restraint system. It receives data from acceleration and yaw rate sensors to assess the severity and nature of an impact. Based on this analysis, it triggers appropriate pyrotechnic actuators—such as front airbags or seatbelt pretensioners—to minimize injuries.

At the same time, the unit logs all relevant system states and fault codes in its internal memory. These records are essential for diagnostics and accident reconstruction.

Why does the control unit Q0008768V00 fail?

A common reason for repairing the Q0008768V00 control unit is the storage of crash data after an accident, which results in a system lockout. Other causes include electronic faults such as defective SMD components, data corruption in EEPROM memory, corroded connector contacts due to moisture, or improper power supply.

After deploying airbags or seatbelt pretensioners, the control unit stores an irreversible crash record. This so‑called trigger lock prevents further use and necessitates professional repair; simply clearing the fault memory is not sufficient.

Electronic components like capacitors or integrated circuits (ICs) on the circuit board can fail due to aging or thermal stress. Water damage or short circuits often lead to defects in SMD components and traces.

Another source of failure is data corruption in the internal memory (EEPROM/Flash), which may cause software errors or complete communication failure. In repair offers, this control unit is frequently listed alongside equivalent part numbers 0008767V003, 0008768V002, and 0008768V003.

How do you recognize a defect in the Q0008768V00?

A defect in the Q0008768V00 control unit primarily manifests as a permanently illuminated airbag warning light on the instrument cluster. Often, communication with the control unit via a diagnostic tool is also impossible. The fault memory may contain specific codes such as B1102, B2137, or B2010, indicating internal faults or a stored crash event.

The most noticeable symptom is the persistently lit airbag indicator light (SRS light). It does not turn off after starting the vehicle, signaling a serious, safety‑relevant system error.

In many cases, a workshop cannot establish communication with the airbag control unit. The module fails to respond to diagnostic requests, making it impossible to read the fault memory—often pointing to an internal hardware fault or a complete power supply failure.

When fault codes are read, specific DTCs such as B1102, B2137, or B2010 in Smart Roadster models directly indicate issues within the control unit, associated sensors, or a stored crash status. These codes clearly signal the need for specialist inspection.

In which vehicles is the Q0008768V00 installed?

The airbag control unit with part number Q0008768V00 is specifically designed for the Smart Roadster model series C452, produced between 2003 and 2005. At Airbag24, we specialize in the expert repair of this control unit exclusively for this vehicle model.

At Airbag24, we repair the Q0008768V00 control unit for the following model:

Smart: Roadster (C452), manufactured from 2003 to 2005

How is the airbag control unit Q0008768V00 professionally repaired?

At Airbag24, repairs of the Q0008768V00 begin with a comprehensive diagnosis to verify the fault. Depending on the cause, stored crash data is safely reset, defective electronic components on the circuit board are replaced, and cold solder joints are reworked. A final functional test ensures full operability, backed by a 12‑month warranty.

Upon submission to Airbag24, each control unit undergoes a standardized process. First, the circuit board is visually inspected for corrosion or fire damage, and the fault memory is read to confirm reported symptoms. If crash data is present, it is carefully analyzed and documented.

The actual electronic repair takes place under ESD‑safe conditions. Defective SMD components are precisely replaced using micro‑soldering techniques and rework stations. Simultaneously, crash data is securely reset using specialized software, adhering to manufacturer specifications.

Finally, a comprehensive final inspection is carried out. This includes testing the control unit’s communication, clearing the fault memory, and verifying that all functions have been restored. We provide a 12-month warranty on every repair.

What shipping options are available?

You can either send your defective control unit to Airbag24 yourself at no cost, or arrange a convenient UPS pickup. For returning the repaired unit, we offer several options: free standard UPS shipping, faster UPS Express shipping, and both options optionally with cash-on-delivery. Local self-collection is also available.

For sending the item to us, you have the choice: ship the package yourself, or use our UPS pickup service, which collects the package from a location of your choosing.

After the repair is completed, the following paid and free return options are available:

Free standard UPS shipping (1–3 business days)

UPS Express shipping (1–2 business days)

Standard UPS shipping with cash-on-delivery (1–3 business days)

UPS Express shipping with cash-on-delivery (1–2 business days)

Self-collection at our store