Airbag control unit with part number 150300-2965

What is the function of Airbag Control Unit 150300-2965?

The airbag control unit with part number 150300-2965 serves as the central control module for the occupant protection system in certain Toyota models. It processes data from crash sensors and is responsible for precisely and rapidly deploying airbags and seatbelt pretensioners in the event of a collision.

Technically, it is an electronic module that continuously monitors signals from the vehicle’s acceleration and pressure sensors. Upon detecting a collision exceeding predefined thresholds, the control unit sends ignition pulses to the corresponding pyrotechnic devices of the airbags and seatbelt pretensioners.

This component thus acts as the brain of the passive safety system. Its flawless operation is essential to ensure occupant protection during a crash. It is typically installed centrally within the vehicle, often beneath the center console or front seats, to provide optimal protection against external influences.

Why does control unit 150300-2965 fail?

The most common cause of failure for control unit 150300-2965 is the storage of crash data following an accident. Additional defects arise from moisture damage—especially during off-road use—as well as from the natural aging of electronic components such as capacitors or microcontrollers.

A key issue is stored crash data. After a collision—even minor rear-end impacts—the control unit internally locks itself to prevent unintended re‑deployment. This lock often cannot be cleared by standard diagnostic tools, effectively disabling the entire airbag system.

Water damage is particularly prevalent in Toyota Prado J150 models. Driving through rough terrain or wading through water can allow moisture to enter the cabin and reach the control unit, leading to corrosion and short circuits on the circuit board. This may also manifest as combined faults, such as error code P0202 (injector fault) alongside airbag issues.

Furthermore, internal hardware failures can occur, including cold solder joints, defective processors, or failing memory modules, resulting in communication breakdowns or persistent internal error messages. Note that control units with similar part numbers like 89170-0D440 or 89170-0K131 for the Prado J150 are often interchangeable but must be thoroughly inspected before repair.

How do you recognize a defect in 150300-2965?

A faulty airbag control unit 150300-2965 typically manifests as a permanently illuminated airbag warning light on the instrument cluster. Often, the control unit becomes unresponsive to diagnostic equipment (no communication), or it retains error codes that cannot be cleared.

The primary and most obvious symptom is the persistently lit red airbag warning light. It fails to extinguish after starting the vehicle, indicating a malfunction in the safety system. In this state, the system is usually completely disabled.

Another clear sign is complete loss of communication. When a workshop attempts to read the fault memory via the OBD interface, no response is received from the airbag control unit, suggesting a severe internal failure.

In addition, specific error codes may be stored in memory, pointing to an internal fault within the control unit itself. Errors such as “Internal Control Unit Fault” or more detailed codes like B1920 (short circuit in the passenger airbag circuit) can indicate a problem with the module. Failures triggered by heat or error messages like “defective fuel shut-off valve” have also been observed in association with this control unit.

In which vehicles is control unit 150300-2965 installed?

The airbag control unit 150300-2965 is primarily used across various model series of the Toyota Land Cruiser and Toyota Prado. Repairing this unit is a proven solution for these models, offering a cost-effective way to restore full functionality to the safety system.

At Airbag24, we repair the control unit with part number 150300-2965 for the following models and series:

Toyota: Land Cruiser Heritage Edition, Prado J150 (2009–2013), Prado J150 First Facelift (2013–2015), Prado J150 Second Facelift (2015–2018), Prado J150 Third Facelift (2018–2024)

How does repair work at Airbag24?

Repair at Airbag24 follows a standardized process that begins with removing the defective control unit from the vehicle. Following submission, a professional component-level diagnosis is performed, followed by hardware repair and clearing of stored crash data. The unit is then thoroughly tested and fully restored to operational condition.

After you have securely packaged the control unit and sent it to us, our technicians perform an incoming inspection. During this process, we analyze whether the fault was caused by stored crash data, a hardware defect, or moisture damage.

The actual repair process involves professionally erasing the crash data and replacing defective electronic components such as microcontrollers, capacitors, or memory chips on the circuit board. Thanks to our many years of experience, we can precisely address the typical weak points of this model.

Following successful restoration, each control unit undergoes a comprehensive functional test. This ensures that communication with the vehicle has been re-established and that the airbag system operates flawlessly. We provide 2 years' statutory liability for defects on every repair.