What is an Infiniti Premium M45 airbag control unit?
The Infiniti Premium M45 Airbag Control Unit is the central safety unit in your vehicle, precisely activating all occupant restraint systems, such as airbags and seatbelt pretensioners, in the event of an accident. It continuously monitors sensors in the vehicle, stores important crash data, and ensures the proper functioning of all airbag modules. This component is essential for safety.
It is the heart of the Supplemental Restraint System (SRS) and processes signals from impact sensors and seat occupancy sensors.
The control unit is designed for models from 2003 to 2010, especially for versions with the VK45DE, VQ35DE and VQ35HR engines.
Why is the Infiniti Premium M45 airbag control unit defective?
The Infiniti Premium M45 airbag control unit can fail because it permanently stores crash data after an accident, causing it to lock up, or due to electrical faults such as power surges, short circuits, or water damage that damage the internal electronics. Age-related wear and tear on components can also lead to failure, necessitating repair or replacement.
A common reason is the storage of crash data after an airbag deployment, which requires a reset of the module.
Internal electronic defects, often caused by moisture or aging solder joints, can also damage the system and prevent it from functioning.
A defective vehicle electrical system voltage or malfunctions in the wiring can disrupt communication and paralyze the control unit.
Common error codes for Infiniti Premium M45 airbag control unit repair
During Infiniti Premium M45 airbag control unit repair, specific error codes occur that indicate problems directly with the control unit, rather than with sensors or airbag modules. These codes often signal internal defects, communication issues, or stored crash data and are crucial for a precise diagnosis to repair your Infiniti Premium M45 airbag control unit.
- B1000 → Control unit communication error → Internal malfunction or connection problem to the airbag ECU.
- B1139 → Airbag SRS module error → Internal error of the airbag control unit.
- B1193 → Airbag module-related error → Problem in the airbag control unit itself.
- B1206 → Airbag RCM (Restraint Control Module) Error → Error in the restraint control module.
- U1000 → CAN communication / CAN line fault → Interruption or fault in the data line to the airbag control unit.
- U1010 → Airbag control unit communication (CAN) error → Communication failure of the airbag control unit via the CAN bus.
What part numbers are available for the Infiniti Premium M45 airbag control unit repair?
For the Infiniti Premium M45 airbag control unit repair, specific OEM part numbers are relevant, ensuring compatibility and proper function of the airbag system for model years 2006-2008. These numbers, K851M-EH001, Y851M-EH001, K851M-EH100, and Y851M-EH100, are directly from Infiniti and identify the correct control unit for your vehicle when you have it repaired.
- K851M-EH001 – Original – Infiniti
- Y851M-EH001 – Replacement/Update – Infiniti (replaces K851M-EH001)
- K851M-EH100 – Original – Infiniti
- Y851M-EH100 – Replacement/Update – Infiniti (replaces K851M-EH100)
These part numbers are specific to the airbag control unit of the Infiniti M45 (approx. 2006-2008), including the premium luxury variants.
The Y part numbers are official replacement or follow-up part numbers that also come from Infiniti and offer the same functionality.
It is important to ensure that the module to be repaired or replaced has one of these verified OEM numbers to ensure full safety and compatibility.
Compatibility and function of the Infiniti Premium M45 airbag control unit
The Infiniti Premium M45 Airbag Control Unit is central to your vehicle's safety features and is compatible with Infiniti M45 models from 2003-2010, including specific engines such as the 6-cylinder 3.5L and 8-cylinder 4.5L (VK45DE, VQ35DE, VQ35HR). It continuously monitors sensors and activates the various airbags and seatbelt pretensioners within milliseconds when necessary to protect the occupants.
The control unit processes data from impact sensors, seat occupancy sensors and belt tensioners.
It is equipped with self-diagnosis that detects malfunctions and signals them via the warning light on the dashboard.
A professional workshop can diagnose and repair the Infiniti Premium M45 airbag control unit after a failure.
Installation position and connections on the Infiniti M45 airbag control unit
The Infiniti M45 airbag control unit is typically located under the driver's seat or in the vehicle's center tunnel, well protected from external influences. It is connected to the vehicle's network via a dedicated multi-pin connector and actively communicates with all safety-relevant sensors and actuators, requiring precise installation for any Infiniti Premium M45 airbag control unit repair.
The main connector provides the connection to the power supply and the CAN bus.
There are also connections to the various impact sensors (front and side), seat occupancy sensors and the belt pretensioners.
For diagnostic purposes, the control unit can be accessed via the OBD port to read errors and perform system tests.
Advantages of a professional Infiniti Premium M45 airbag control unit repair
Professionally repairing your Infiniti Premium M45 airbag control unit offers significant advantages over purchasing a new one, saving costs while restoring full functionality to the vital airbag system. A qualified repair shop can resolve specific trouble codes, erase crash data, and reprogram the unit to restore your vehicle's safety, rather than replacing it entirely if it's defective.
A professional repair is often significantly more cost-effective than purchasing a new original part.
It extends the service life of the existing module and contributes to sustainability by reducing the amount of electronic waste.
Only a specialized workshop has the necessary knowledge and tools to perform a safe and effective Infiniti Premium M45 airbag control unit repair.