Airbag control unit with part number 98820CC20A

What is the function of the airbag control unit 98820CC20A?

The airbag control unit 98820CC20A, also known as the SRS module, is the central control unit for the entire restraint system in the Nissan Murano Z51. It continuously processes data from impact sensors and, in the event of a crash, precisely deploys the airbags and pretensioners to protect the occupants.

As the brain of the passive safety system, this module constantly monitors all connected components, including the various airbags, seatbelt pretensioners, and crash sensors strategically positioned throughout the vehicle’s body.

Under normal operating conditions, the control unit ensures the system remains ready for deployment. If it detects a fault—whether internal or in an external component—the SRS warning light on the instrument panel illuminates, alerting the driver that the protective functions are no longer guaranteed and that the airbags may fail to deploy in a real‑world accident.

The technical design of the 98820CC20A control unit is comparable to modules from manufacturers such as Denso or TRW, requiring specialized, cross‑manufacturer repair expertise.

What types of faults occur in the 98820CC20A?

Defects in the 98820CC20A control unit typically arise from stored crash data after an accident, which can lock the system. Other causes include internal electronic malfunctions such as ignition circuit errors (e.g., error code B1129), water damage, corrosion, or faulty wiring within the SRS system.

The most common cause of failure is the storage of crash data. Following a collision—even minor impacts—the control unit self‑locks for safety reasons. Professional repair is essential to erase this data and restore full functionality.

Internal electronic malfunctions are another typical source of issues. Defective components on the circuit board can trigger specific error messages like code B1129 (ignition circuit error) or result in complete communication breakdown with diagnostic tools.

External factors, such as moisture ingress, often lead to irreparable damage. Water exposure causes corrosion on the circuit board, destroying sensitive traces and electronic components. Similarly, broken wires or loose connectors can disrupt communication within the SRS system.

How do you recognize a fault in the 98820CC20A control unit?

A defective 98820CC20A airbag control unit primarily manifests as a permanently illuminated or flashing SRS airbag warning light in the cockpit. This is a clear indication that the airbag system has been deactivated and will not deploy in the event of a crash, necessitating immediate inspection at a workshop.

The airbag warning light on the instrument panel is the most obvious symptom. It fails to extinguish after starting the vehicle or begins to illuminate during driving, signaling that the control unit has detected a critical system error and the protective functions are no longer active.

In many cases, the control unit becomes unresponsive via the OBD interface. Diagnostic equipment cannot establish a connection or read out any error codes, complicating troubleshooting and often pointing to a severe internal defect within the module.

The vehicle itself continues to operate normally, but the occupants’ passive safety is entirely compromised. Continuing to drive with deactivated airbags and seatbelt pretensioners poses a significant safety risk.

In which vehicles is the 98820CC20A control unit installed?

The airbag control unit with part number 98820CC20A is specifically designed for models manufactured by Nissan. It is exclusively used in the second-generation Nissan Murano SUV (Z51), including the facelifted version.

At Airbag24, we professionally repair this control unit for the following specific vehicle models and production periods:

Nissan Murano (Z51 series) from model years 2008 to 2010

Nissan Murano (Z51 facelift) from model years 2010 to 2016

How is the 98820CC20A control unit professionally repaired?

Professional repair of the 98820CC20A control unit at Airbag24 involves electronic refurbishment. Upon receipt, a comprehensive diagnosis is performed to identify faults such as crash data or defective components, which are then corrected at the chip level to restore full functionality.

The process begins with the proper removal of the control unit from the vehicle. The customer securely packages the module for transport and sends it to Airbag24 along with the completed repair form.

Once received, our mechatronics engineers conduct a systematic analysis. Using specialized diagnostic tools, they read out the fault memory and inspect the electronics for hardware damage caused by crash data, corrosion, or internal component failures.

The actual repair involves rectifying the identified defects. This may include professionally erasing crash data, replacing faulty electronic components on the circuit board, or performing the final calibration of the unit.

Before being returned, each refurbished control unit undergoes a final functional test to ensure proper operation. We provide 2 years' statutory liability for defects on all repairs.