Airbag control unit with part number 631265000B

What is the function of the airbag control unit 631265000B?

The airbag control unit with part number 631265000B is the central control module for the passive safety system in the Infiniti QX50, P15 series, from 2017 onwards. It continuously monitors data from the acceleration and yaw rate sensors to precisely deploy the airbags and seatbelt pretensioners within milliseconds in the event of a collision.

As the “brain” of the restraint system, this module is responsible for receiving and interpreting signals from all relevant crash sensors in the vehicle. Based on this data, it determines which safety components—such as front, side, or head airbags, as well as seatbelt pretensioners—need to be activated to provide optimal occupant protection.

In addition, the control unit performs continuous self-tests to ensure the entire system remains functional. Any detected faults are logged and indicated to the driver via the airbag warning light on the dashboard.

Why does the control unit 631265000B fail?

Defects in the control unit 631265000B are typically caused by internal electronic malfunctions. Common causes include stored crash data after an accident that prevents further operation, or failure of internal components leading to communication issues. The specific fault code B142A indicates such an internal defect.

A frequent reason for necessary repair is the storage of crash data. After the airbags or seatbelt pretensioners have deployed, the control unit locks itself and must be reset to its factory settings to regain full functionality. This is a manufacturer‑specified safety measure.

Furthermore, electronic components on the circuit board itself may also fail, resulting in complete loss of communication, where the control unit becomes unresponsive through the diagnostic port. Such defects are resolved through targeted component‑level repairs.

How can you recognize a defect in the control unit 631265000B?

A defect in the control unit 631265000B primarily manifests as a permanently illuminated airbag warning light on the instrument cluster. Often, diagnostic tools can no longer communicate with the module, or the specific fault code B142A is read, signaling an internal malfunction.

The most obvious sign is the persistently lit airbag warning light, which fails to extinguish after starting the vehicle, indicating a serious, permanent system error.

Another clear symptom is when the fault memory contains the specific fault code B142A. This code directly points to an irreparable internal fault within the control unit itself, making repair unavoidable.

In many cases, the control unit becomes inaccessible to diagnostic equipment. The workshop then cannot establish a connection to the airbag system to read or clear fault codes. Simultaneously, error messages may appear on the vehicle’s display, indicating a problem with the restraint system.

In which vehicles is part number 631265000B installed?

The airbag control unit with part number 631265000B is exclusively fitted in the Infiniti QX50, P15 series, produced from the 2017 model year onward. Airbag24 specializes in the professional repair of this specific control unit model for the QX50.

Airbag24 offers repair services for the following models:

Infiniti QX50 (P15 series, from 2017 onward)

How is the repair of the control unit 631265000B carried out?

At Airbag24, the repair of the control unit 631265000B follows a standardized process. Upon shipment, the unit undergoes systematic analysis to pinpoint the exact source of the fault. The repair includes fixing the electronic defect and resetting any stored crash data, ensuring the unit is once again ready for plug-and-play installation.

The process begins with the proper removal of the control unit from the vehicle. A repair order is then completed, and the securely packaged unit is sent to the specialized workshop.

Upon receipt at Airbag24, technicians with over 20 years of experience conduct a thorough diagnosis to identify the precise cause of the fault. Based on this analysis, they perform precise component‑level repairs, guaranteeing long‑lasting and reliable performance.

Following successful repair and a final functional test, the control unit returns to plug-and-play condition. Typically, no additional coding or programming is required after reinstallation in the vehicle. All repairs come with a 12‑month warranty.

What shipping options does Airbag24 offer?

To send your control unit to Airbag24, you can either ship it yourself free of charge or arrange a paid UPS pickup. For the return shipment, several options are available: free UPS Standard shipping, faster UPS Express shipping, and both options with cash on delivery. In‑store self‑pickup is also possible.

For the outbound shipment, you have a choice: either send the package at your own expense or conveniently book a UPS pickup from a location of your choice.

The return shipment of the repaired control unit is provided free of charge by default via UPS Standard shipping. If you prefer faster delivery, you can opt for UPS Express shipping. Both shipping methods can also be combined with the cash‑on‑delivery payment option. Alternatively, you may choose to pick up your device in person.