Airbag control unit with part number 152100-4380

What is the function of Airbag Control Unit 152100-4380?

The airbag control unit with part number 152100-4380 is the central control module for the Safety Restraint System (SRS) in the Toyota Raize Z. It processes signals from impact sensors and, within milliseconds, determines whether to deploy airbags and seatbelt pretensioners, providing optimal protection for occupants in the event of a crash.

As the brain of the passive safety system, this control unit is responsible for monitoring all relevant components, including the various airbags, seatbelt pretensioners, as well as their associated sensors and wiring harnesses.

Under normal operating conditions, the unit continuously performs self-tests. In case of a malfunction or after deployment, an error code is stored in its memory, and the airbag warning light on the instrument panel illuminates.

Why does Control Unit 152100-4380 fail?

The most common reason for repairing Control Unit 152100-4380 is the storage of crash data following airbag deployment. Other causes include peripheral faults such as broken wiring, faulty connectors, or general communication issues with the unit, requiring precise diagnostics.

After a traffic accident involving airbag or seatbelt pretensioner deployment, the control unit permanently stores so‑called crash data. This blockage prevents the system from functioning again and necessitates professional repair to reset these records.

Additionally, external factors can also lead to malfunctions. Defective or broken wires connecting to the control unit or sensors disrupt signal transmission. Similarly, loose or corroded connectors can interfere with communication and trigger error codes.

How do you recognize a defect in Control Unit 152100-4380?

The clearest indication of a fault in the airbag system is the persistently illuminated airbag warning light (SRS light) in the cockpit. Furthermore, diagnostic tools may no longer be able to establish communication with the control unit, complicating fault analysis at the workshop.

Normally, the airbag warning light goes out within seconds after starting the vehicle. If it remains lit, this indicates an active system error that should be checked immediately. The cause often lies directly within the control unit, especially after an accident.

Another symptom is a loss of communication during diagnostics. If the workshop attempts to read the fault memory but the control unit fails to respond, this points to a serious internal fault within the module.

In which vehicles is Control Unit 152100-4380 installed?

The airbag control unit with part number 152100-4380 is specifically used in Toyota vehicles. Repair services for this model are offered for the Toyota Raize Z, ensuring specialized expertise tailored to this vehicle and providing a cost-effective alternative to purchasing a new unit.

At Airbag24, we repair Control Unit 152100-4380 for the following model:

Toyota: Raize Z (from model year 2019 onward)

How is Control Unit 152100-4380 repaired?

Repair at Airbag24 follows a standardized process: After an initial inspection using specialized diagnostic equipment, the stored crash data is erased. Defective components are then replaced, and circuit traces are repaired. A final test ensures full functionality.

Once the removed control unit arrives at Airbag24, a detailed analysis is conducted to pinpoint the exact fault. The first step typically involves reading and resetting the internal memory to remove any lockout caused by an accident.

Subsequently, technicians perform necessary repairs at the circuit board level. This may include replacing defective electronic components or restoring damaged circuit traces, using only parts that meet Toyota’s quality standards.

Finally, the repaired control unit undergoes a comprehensive functional test, simulating all components of the airbag system to verify proper operation. We provide 2 years' statutory liability for defects on every repair.

Is repairing 152100-4380 worthwhile?

Repairing the airbag control unit is a highly economical alternative to buying a new one. Users report savings of 700–800 euros compared to purchasing a brand-new unit from the manufacturer. Additionally, the original vehicle configuration remains intact.

A key advantage is the significant cost reduction. Rather than acquiring an expensive new component, targeted repairs can drastically cut expenses without compromising safety or functionality.

Since the original control unit is repaired, time-consuming reprogramming or vehicle coding is unnecessary. After repair, the unit can be reinstalled via plug-and-play, saving both workshop costs and time.