Airbag control unit with part number 98820-AC700

What is the function of the Airbag Control Unit 98820-AC700?

The Airbag Control Unit 98820-AC700, also known as the SRS Control Unit, is the central control module for the occupant protection system in the Infiniti G35 V36 Coupe. It analyzes data from crash sensors and, within milliseconds, determines whether to deploy airbags and seatbelt pretensioners to protect vehicle occupants in the event of a collision.

This unit is specifically designed for the Infiniti G35 V36 Coupe manufactured between 2007 and 2009. It coordinates the entire restraint system, including front, side, and head airbags, as well as associated seatbelt pretensioners, to deliver optimal protection.

Proper functioning of this control unit is critical for safety. If it fails or becomes internally locked, the entire airbag system in the vehicle will be disabled, potentially resulting in severe or fatal injuries during an accident.

Why does the 98820-AC700 control unit fail?

Failures in the 98820-AC700 control unit typically arise from stored crash data after an accident, which causes the unit to lock itself. Other causes include electronic malfunctions, moisture damage, or failure of internal components such as the EEPROM memory chip type 93C56. These issues lead to deactivation of the airbag system.

The most common cause of failure is the storage of crash data. Following a collision, the control unit locks itself for safety reasons and must be professionally reset to restore full functionality of the airbag system.

Electronic faults in internal components are another frequent source of problems. These can result from aging, voltage spikes in the vehicle’s electrical system, or moisture ingress, leading to corrosion and short circuits on the circuit board that disrupt communication.

The device is technically related to part numbers 98820-AC70A and 98820-AC701, which often exhibit identical fault symptoms. Precise diagnosis at a specialized workshop is essential to confidently identify the control unit as the root cause before removal.

How do you recognize a fault in the 98820-AC700?

A malfunctioning Airbag Control Unit 98820-AC700 primarily manifests as a permanently or intermittently illuminated airbag warning light on the instrument cluster. Often, communication with the control unit via a diagnostic tool also becomes impossible, with error code B1000 (control unit failure) being typical.

The clearest indication is the activated airbag warning light (SRS light), which unambiguously informs the driver that the safety system is not operational and would not deploy in an accident.

Another clear symptom occurs when a workshop’s diagnostic equipment cannot access the airbag control unit. Attempts to read the fault memory fail, pointing to a serious internal hardware defect.

In some cases, specific error codes are stored, indicating issues with internal components or connections—such as those related to side airbags. These errors often remain unresolved as long as the underlying fault persists within the control unit itself.

In which vehicles is the 98820-AC700 control unit installed?

The Airbag Control Unit with part number 98820-AC700, along with compatible numbers 98820-AC70A and 98820-AC701, is specifically designed for the Infiniti G35. Airbag24 offers professional repair services for this control unit, which is installed in the following models.

At Airbag24, we repair part number 98820-AC700 for the following vehicle model:

Infiniti: G35 V36 Coupe (model years 2007–2009)

Our repairs ensure that the original, vehicle‑specific control unit remains intact, avoiding time-consuming reprogramming or compatibility issues that may arise when replacing it with a used or new component.

How does the repair of the 98820-AC700 proceed at Airbag24?

Repair services at Airbag24 fully restore your control unit’s functionality. After removal and shipment, the unit undergoes chip-level analysis; defective components such as the EEPROM memory chip (93C56) are replaced, crash data is erased, and all functions are verified on a test bench.

The process ideally begins with a diagnosis at your local workshop to confirm that the control unit is indeed the source of the problem. Subsequently, the faulty unit is carefully removed and securely packaged for shipment to Airbag24. Please include a detailed description of the issue and, if available, a diagnostic report.

At Airbag24, our technicians perform a thorough electronics analysis. Stored crash data is professionally erased, and any defective hardware components on the circuit board are expertly replaced, ensuring complete restoration of the original factory functionality.

After repair, each control unit undergoes a comprehensive functional test to ensure proper communication and deployment functionality. You receive a fully operational unit that performs like new, complete with a 12-month warranty.

How does the control unit reach Airbag24?

For repairing your airbag control unit, Airbag24 offers flexible and secure shipping options. You can return the defective unit free of charge yourself or take advantage of our convenient UPS pickup service. For the return shipment, you have access to free standard and fast express options, including cash-on-delivery.

For the outbound shipment, you have two choices: you can send the package to us on your own or arrange for UPS to pick it up at a location of your choice, simplifying the shipping process.

Following successful repair, the returned unit is shipped back to you. You can choose between free UPS standard shipping (1–3 business days) and faster UPS express shipping (1–2 business days).

Both shipping methods are also available as cash-on-delivery if you prefer to pay upon receipt. Alternatively, you can pick up your repaired control unit directly from our premises.