Airbag control unit with part number 55302K0061E0

What is the function of the airbag control unit 55302K0061E0?

The airbag control unit 55302K0061E0 is the central control module for the occupant safety system (SRS) in the Toyota Yaris Cross from model year 2020 onwards. It processes data from crash sensors within milliseconds to precisely deploy airbags and seatbelt pretensioners in the event of a collision, thereby protecting occupants.

As an original OEM part from Toyota, also known by reference number 89170-K0060, it continuously monitors all connected components such as sensors and airbag modules. Its primary role is to ensure the flawless operation of the entire restraint system.

The unit is strategically positioned within the vehicle, typically centrally beneath the dashboard or in the center console, to optimally receive and process signals from all relevant sensors.

Why does the control unit 55302K0061E0 fail?

The most common cause of failure for the control unit 55302K0061E0 is crash data that becomes stored and locked after an accident. Other defects include internal hardware malfunctions on the circuit board or interrupted communication, which can make diagnosis impossible.

Following a collision—even a minor one—the control unit permanently stores crash data. This lockout prevents the airbags from deploying again and often cannot be reset using conventional diagnostic tools. The system then reports a persistent fault.

Another frequent issue is an internal malfunction within the control unit itself. This may involve defective components such as capacitors or problems on the circuit board. In some cases, this results in specific error codes like B0108 or causes the vehicle identification number (VIN) to disappear from memory.

A lack of communication via the OBD2 interface is also a typical symptom. The control unit becomes inaccessible to diagnostic equipment, hindering accurate fault analysis at the workshop and often mistakenly pointing to wiring issues when the root cause lies within the unit itself.

How do you recognize a defect in the 55302K0061E0?

A defective airbag control unit 55302K0061E0 primarily manifests as a persistently illuminated airbag or SRS warning light on the instrument cluster. Additionally, the control unit may become unresponsive to diagnostic tools, refusing communication.

The most obvious sign is the active airbag warning light, which fails to extinguish after starting the engine—indicating a serious, safety-critical system fault. Such a vehicle will not pass the main inspection (TÜV).

Another clear symptom occurs when the workshop’s diagnostic tool cannot establish communication with the airbag control unit. The unit does not respond to queries, making it impossible to read out error codes or erase stored entries.

In the event of a crash, the entire airbag system no longer functions properly. The control unit is locked and unable to process new signals to deploy the airbags, posing a significant safety risk.

In which vehicles is 55302K0061E0 installed?

The airbag control unit with part number 55302K0061E0 is specifically used in models manufactured by Japanese automaker Toyota. At Airbag24, we offer professional repair services for the control unit installed in these vehicles.

At Airbag24, the 55302K0061E0 control unit is repaired for the following model:

Toyota: Yaris Cross (from model year 2020 onward)

This repair represents a proven, cost-effective alternative to expensive new purchases, where market research indicates replacement parts can cost several thousand euros.

How is 55302K0061E0 professionally repaired?

Repair services at Airbag24 include professional diagnostics of the submitted control unit, deletion of crash data, rectification of internal electronic faults, and a final functional test. We provide a 12-month warranty on every repair.

Upon receipt of the removed control unit at Airbag24, technicians conduct a thorough analysis to identify the exact cause of the fault. This includes testing communication capabilities and reviewing internal fault logs.

The core of the repair often involves safely and completely erasing crash data stored after an accident. If hardware defects are present on the circuit board, affected electronic components are replaced according to industry standards.

Subsequently, the control unit undergoes an intensive final inspection to ensure full functionality. The repair provides a plug-and-play solution that requires no re-coding in the vehicle and restores the original functionality.

What shipping options are available at Airbag24?

Airbag24 offers flexible shipping options for a hassle-free process. You can either send your defective control unit back to us free of charge yourself or arrange a convenient UPS pickup. Returns are also handled via UPS, with your choice of standard or express shipping.

For the outbound shipment, you have two options: pack the control unit securely and send it to us on your own, or use our convenient UPS pickup service, where a courier will collect the package from a location of your choosing.

The return shipment of the repaired unit can be arranged as a free UPS standard delivery (1–3 business days) or as a faster UPS express delivery (1–2 business days). Both options are also available with cash-on-delivery.

Of course, you can also drop off your control unit in person at our workshop and pick it up again after repair.