What is a Nissan Altima L33 airbag control module?
The Nissan Altima L33 airbag control unit is the central safety unit that activates all occupant restraint systems, such as airbags and seatbelt pretensioners, in the event of an accident. It monitors sensors, stores crash data, and ensures the proper functioning of all airbag modules in the vehicle for maximum safety.
This module, also called the SRS Airbag Computer Diagnostic Control Module, is the brain of the passive safety system in your Nissan Altima L33.
It continuously monitors the sensors of front, side and head airbags as well as belt tensioners and triggers them if necessary.
Why is the Nissan Altima L33 airbag control unit defective?
A Nissan Altima L33 airbag control module often becomes **defective** after an accident because it irreversibly stores crash data, or due to internal electronic **faults**. This leads to activation of the warning light and loss of function, necessitating professional **repair** or replacement.
Common causes are internal damage caused by voltage spikes or age-related wear and tear of the electronic components.
A defect can also be caused by water ingress or improper intervention in the on-board electrical system, which leads to a **failure**.
Common error codes for Nissan Altima L33 airbag control unit repair
Typical **error codes** for a **defective** Nissan Altima L33 airbag control unit directly indicate internal module problems, communication failures, or the need for a reset. These **errors** require professional **diagnosis** at the **workshop** to determine the exact cause and restore the system to working order.
- B1239 → Airbag control unit defective → Internal module defect or stored crash data.
- B1414 → Airbag control module – module needs to be reset → Stored crash data after an event.
- U1010 → Airbag control unit (CAN) communication error → Malfunction in the CAN bus network of the control unit.
- B00A0 → Airbag control unit internal error → Internal electronic defect or software damage, often mentioned in Service Bulletin NTB13-033.
These DTCs (Diagnostic Trouble Codes) are specific to problems with the airbag control unit itself and indicate a necessary **repair** or replacement.
The **diagnosis** is carried out using special Nissan tools such as CONSULT-III plus to determine the exact cause of the **fault**.
What part numbers are available for the Nissan Altima L33 airbag control unit repair?
When repairing or replacing a Nissan Altima L33 airbag control module, specific OEM part numbers are critical to ensure compatibility and safety. Comparing the existing part number with confirmed original parts is essential for smooth installation and proper function.
The following OEM part numbers are 100% verified for the Nissan Altima L33 Airbag Control Module (model year approximately 2013-2018):
- 98820-3TA9C (Nissan OEM)
- 98820-9HS9A (Nissan OEM)
- 988203TA0B (Nissan OEM)
- 988209HN0A (Nissan OEM)
These numbers cover various years and trim levels of the Altima L33, including models with 4-cylinder and 6-cylinder engines.
It is imperative that you accurately match the part number of the defective control unit in your vehicle, otherwise compatibility cannot be guaranteed.
After **repair** or replacement, the new or repaired airbag control unit must be programmed to the vehicle VIN at a certified **workshop** to ensure full functionality and to clear the airbag warning light.