What is a Subaru Impreza G4 airbag control unit?
The Subaru Impreza G4 airbag control unit is the central safety unit in the vehicle, activating all occupant restraint systems, such as airbags and seatbelt pretensioners, in the event of an accident. It continuously monitors sensors, stores relevant crash data, and ensures the proper functioning of the entire passive safety system, making a professional Subaru Impreza G4 airbag control unit repair essential.
This electronic module (SRS Airbag Computer) receives signals from various crash sensors. It evaluates this data in real time to precisely and quickly trigger the safety components if necessary.
After activation, the control unit stores crash data that prevents further use until the module is repaired or replaced.
Why is the Subaru Impreza G4 airbag control unit defective?
A Subaru Impreza G4 airbag control unit can malfunction because it stores crash data after an accident that requires a reset, or due to internal electronic errors. Overvoltages and wear can damage components, leading to system failure and requiring professional Subaru Impreza G4 airbag control unit repair.
Common causes of a defect are internal circuit errors or damaged memory (EEPROM).
An airbag control unit can also fail if the vehicle battery is weak or there are short circuits in the wiring harness.
The airbag warning light will illuminate continuously if such an error or failure occurs in the system and diagnosis is required.
Common error codes for Subaru Impreza G4 airbag control unit repair
Typical error codes during Subaru Impreza G4 airbag control unit repairs indicate problems with the airbag control unit itself, not with sensors or other components. These B-codes are read via the OBD-II diagnostic port and signal malfunctions in the module's communication, internal memory, or power supply, allowing for targeted workshop diagnostics.
- B1000: Control unit communication error → Signal connection faulty → Internal control unit fault or wiring problem.
- B1080: Ignition switch signal error → Ignition circuit implausible → Faulty power supply to the control unit.
- B1100: Airbag control unit internal error → System internal malfunction → Defect in the microcontroller or EEPROM.
- B1101: EEPROM data error in the control unit → memory data corrupt → crash data memory full or damaged.
- B1120: Diagnostic port or line error → OBD-II connection interrupted → Wire break or connector problem.
- B1140: Internal control unit memory error → Insufficient internal memory → Data inconsistency in the module.
- B1200: Airbag main circuit malfunction → Main circuit open → Open or short circuit in the system.
- B1202: Error in the data bus between control units → CAN bus communication failure → Data transmission problem between modules.
- B1420: Airbag interface malfunction → Sensor communication problems → Defect in the control unit inputs.
- B1500: Airbag control unit circuit problem → General electrical malfunction → Short circuit or open circuit.
- B1610: Airbag control unit voltage supply error → Undervoltage or overvoltage → Problem with the vehicle electrical system voltage.
- B1620: Short circuit or open circuit in airbag circuit → Fault in ignition circuits → Damaged wiring or connectors to airbags.
- B1700: Internal error in airbag control unit memory → memory data corrupt → memory module error requires Subaru Impreza G4 airbag control unit repair.
- B1800: Airbag system monitoring circuit error → Monitoring system defective → Internal monitoring logic faulty.
What part numbers are available for the Subaru Impreza G4 airbag control unit repair?
For Subaru Impreza G4 airbag control unit repairs, several exact OEM part numbers are relevant, either directly from Subaru or provided by approved suppliers such as Autoliv and Bosch. These numbers are crucial for correct identification and compatibility of the replacement part and must exactly match the defective module to ensure a successful repair or replacement.
The most important original Subaru part numbers for the Impreza G4 airbag control unit are:
- 98221FJ030: Genuine Subaru part, often found in models from 2012-2016.
- 98221FJ480: Also a genuine Subaru number, compatible with the G4 series.
- 98221FE100: A newer variant of the original control unit for later G4 models.
- 98221FE020: Another genuine part for newer generations of the Impreza G4.
In addition, there are compatible replacement part numbers from suppliers that are functionally equivalent:
- 1503004720 or 150300-4720: Often from suppliers such as Autoliv.
- 1523006130: Another replacement number from suppliers.
- 98221FE200: A common replacement number for the FE series.
Compatibility should always be checked using the vehicle identification number (VIN) to ensure the correct Subaru Impreza G4 airbag control unit repair.
Installation and compatibility of the Subaru Impreza G4 airbag control unit
Installing a Subaru Impreza G4 airbag control unit requires specialist expertise and is typically performed in the vehicle's center console or under the seat. After replacement, the module often needs to be reprogrammed with the vehicle's vehicle identification number (VIN) because it is system-specific. This ensures full functionality of the passive safety system and is crucial for a successful Subaru Impreza G4 airbag control unit repair at a qualified workshop.
The control unit is connected to all airbag sensors, airbags and belt pretensioners via specific yellow-marked wiring harnesses.
It is critical that all connectors are correctly and securely seated, as loose connections could affect system functionality.
The module is primarily designed for Subaru Impreza G4 models from 2013 to 2019, but may also be compatible with other Impreza generations as long as the part number and software match.
Benefits of Subaru Impreza G4 Airbag Control Unit Repair
Repairing a Subaru Impreza G4 airbag control unit offers significant advantages over purchasing a new one, including significant cost savings of up to 80% and an important contribution to sustainability through component reuse. A professional Subaru Impreza G4 airbag control unit repair restores the safety module to full functionality, often with a warranty, and avoids unnecessary electronic waste.
Repair services offer thoroughly inspected and tested modules that come with a warranty.
This is an environmentally friendly alternative as it reduces the production of new parts and the associated resource consumption.
A professional repair in a specialized workshop guarantees compliance with safety standards and the correct functioning of the system.