What is a Nissan Dayz Roox B21A airbag control unit?
The Nissan Dayz Roox B21A airbag control unit is the central safety unit that activates all occupant restraint systems in the event of an accident. It monitors sensors, stores crash data, and ensures the proper functioning of all airbag modules in the vehicle, which is essential for any Nissan Dayz Roox B21A airbag control unit repair.
This SRS (Supplemental Restraint System) control unit uses EEPROM memory such as the 95128 and 95640 for data storage. It is responsible for monitoring the sensors and ensuring system integrity through self-diagnosis.
After deployment, the control unit can be reset, allowing for cost-effective reuse. This is an important option for Nissan Dayz Roox B21A airbag control unit repair.
Why is the Nissan Dayz Roox B21A airbag control unit defective?
The Nissan Dayz Roox B21A airbag control unit often malfunctions because it stores crash data after an accident, causing a system error. Internal self-test errors or power supply problems can also lead to the unit failing, necessitating a costly Nissan Dayz Roox B21A airbag control unit repair.
After an impact, the crash data is stored in the EEPROM memory, preventing the airbag system from functioning normally. This requires a professional reset of the control unit.
Internal components can also fail or be damaged by leakage currents. A precise diagnosis is essential to identify the cause of the defect and repair the airbag control unit.
Common error codes for Nissan Dayz Roox B21A airbag control unit repair
For Nissan Dayz Roox B21A airbag control unit repair, specific OBD-II B codes are relevant, which directly affect the control unit. These codes often indicate communication or internal errors, although exact, OEM-specific lists are rarely publicly available and require professional diagnostic tools.
- B1000 → Control unit communication error → Internal system error or wiring problem
- B1100 → Internal self-test error → Malfunction of the internal electronics of the control unit
- B1200 → Power supply error → Problem with the power supply to the airbag control unit
Although these error codes are typical, there are no publicly available, precise OEM lists specifically for the Nissan Dayz Roox B21A airbag control unit. Therefore, a precise diagnosis requires specialized Nissan diagnostic systems or access to official service documentation.
What part numbers are available for the Nissan Dayz Roox B21A airbag control unit repair?
For the Nissan Dayz Roox B21A airbag control unit repair, there are several verified OEM part numbers that guarantee compatibility. These include original Nissan numbers as well as numbers from original equipment suppliers such as Takata/Autoliv, all of which ensure the same functionality for the airbag system.
- 98820-5XJ0A (Nissan Original OEM)
- 98820-5XJ1A (Nissan Original OEM)
- 98820-5XJ2A (Nissan Original OEM)
- 28556-B2100 (Takata/Autoliv OEM supplier)
Part number 28556-B2100 comes from OEM suppliers such as Takata/Autoliv and is also compatible as an SRS airbag ECU. This has been confirmed by TecDoc and Autoliv databases.
There are also alternative or successor models such as 98820-5XJ0B and 98820-5XJ0C, which are functionally identical. These variants are also suitable for the Nissan Dayz Roox B21A airbag control unit repair.
It is crucial to verify the Vehicle Identification Number (VIN) for final parts matching. Consultation with an authorized Nissan service partner is always recommended to rule out newer numbers.