Airbag control unit with part number 25348-5CA0B

What is the function of Airbag Control Unit 25348-5CA0B?

The Airbag Control Unit 25348-5CA0B is the central control module for the occupant protection system in models such as the Infiniti Q60. It serves as a crash and pedestrian protection module, processes data from crash sensors, and, in the event of an accident, controls the deployment of airbags, seatbelt pretensioners, and the active hood to ensure safety.

Technically speaking, this control unit is the brain of the passive safety system. It continuously monitors all connected components, including crash sensors, seat occupancy mats, seatbelt pretensioners, and individual airbag modules.

In the event of a collision, the unit’s electronics determine within milliseconds which restraint systems need to be activated. For the Infiniti Q60 (CV37), it also manages the pedestrian protection system, which, upon a suitable impact, deploys the active hood to reduce injury severity for pedestrians.

The part number 25348-5CA0B is listed as an original Nissan/Infiniti OEM part and corresponds technically to the compatible OEM part number 98820‑1VZ0B.

Why does Control Unit 25348-5CA0B fail?

The most common cause of failure is the storage of crash data after an accident. This permanently locks the control unit. Other reasons include internal hardware defects in electronic components due to aging or vibration, issues with the power supply, and, more rarely, moisture damage to the circuit board or connectors.

Following a collision in which airbags, seatbelt pretensioners, or the pedestrian protection system (active hood) have deployed, the 25348-5CA0B control unit irrevocably stores so‑called crash data in its internal memory (EEPROM/Flash). This safety mechanism locks the module and prevents further use, even if visible vehicle damage has been repaired. The fault cannot be cleared using workshop diagnostic tools.

Internal electronic defects are another major cause. Components such as voltage regulators, driver ICs, or memory chips can fail due to thermal stress, vibrations during driving, or simple material fatigue. This often results in complete loss of functionality or error messages indicating an “internal fault.”

The power supply can also be problematic. A fault code stored in the error memory, such as B1260, indicates insufficient supply voltage, which may stem from external or internal causes. Less frequently, moisture ingress or corrosion on connectors and traces can impair the control unit’s operation.

How do you recognize a defect in Control Unit 25348-5CA0B?

A defect in Control Unit 25348-5CA0B primarily manifests as a constantly illuminated airbag warning light on the instrument cluster. Often, additional warning messages such as “Airbag control unit defective” appear. Another clear sign is when the control unit becomes unresponsive to diagnostic equipment or displays an error that cannot be cleared.

The most obvious symptom is the red airbag warning light that remains on continuously or intermittently. This indicates a malfunction in the safety system and fails to extinguish after starting the vehicle as usual.

In vehicles like the Infiniti Q60, the “active hood” warning light may also indicate a fault in the pedestrian protection system, which is directly managed by the airbag control unit.

In the workshop, the defect often shows up as a lack of communication: the diagnostic tool cannot establish a connection with the airbag control unit, or error codes are read out that point to an “internal fault” or “stored crash data” that cannot be cleared.

In which vehicles is Control Unit 25348-5CA0B installed?

The Airbag Control Unit with part number 25348-5CA0B was specifically developed for Infiniti vehicles. It is mainly used in the Q60 model series of the CV37 generation. At Airbag24, we offer professional repair services for all variants of this model equipped with this control unit.

At Airbag24, we repair the Airbag Control Unit 25348-5CA0B for the following specific Infiniti models:

Infiniti Q60 CV37 (circa 2016–2022)

Infiniti Q60 Coupe CV37 (circa 2016–2022)

Infiniti Q60 Convertible CV37 (circa 2016–2022)

As this is a specific OEM part for this model series, correct identification via the part number is crucial for successful diagnosis and repair.

How is Control Unit 25348-5CA0B professionally repaired?

At Airbag24, the 25348-5CA0B control unit undergoes a comprehensive electronic analysis upon receipt. Repair includes selectively resetting stored crash data from the memory chip or, in cases of hardware defects, replacing faulty components. A subsequent functional test on the test bench ensures quality. You receive 2 years' statutory liability for defects on the repair.

Upon receipt of the removed control unit at Airbag24, an initial incoming inspection is performed. Technicians analyze communication and the internal fault memory on a specialized test bench to determine the exact cause of the defect. A diagnostic report from the workshop is very helpful in this process.

If stored crash data is present, it is extracted directly from the EEPROM or flash memory of the control unit using specialized software. This restores the module to its factory settings, making it fully functional again.

In cases of electronic hardware failure, faulty components such as processors, memory chips, or voltage regulators on the circuit board are identified and replaced by qualified technicians. Damaged solder joints or conductive traces are also professionally repaired.

Finally, each repaired control unit undergoes a comprehensive functional test. Only after passing this test is it approved for return shipment. We provide 2 years' statutory liability for defects on all repairs performed.

Is Repairing Control Unit 25348-5CA0B Worth It?

Yes, repair is an economically and technically sensible alternative to purchasing a new unit. Compared to an expensive new part, you can save significantly on costs. Moreover, the original vehicle-specifically configured control unit remains intact, simplifying reinstallation and eliminating the need for additional programming work at the workshop.

The greatest advantage of repair lies in the substantial cost savings. A new airbag control unit from the manufacturer is often a very expensive replacement part, whereas repair costs only a fraction of that amount.

An additional key benefit is preserving the original component. Since the vehicle-specific configuration and coding remain unchanged, the unit can be reinstalled without time-consuming recalibration or reprogramming after repair.

Furthermore, refurbishment is a sustainable solution, as valuable electronic components are reused instead of being discarded. With 2 years' statutory liability for defects on the repair, this option also provides the necessary assurance.