Airbag control unit with part number 98584-2N400

What is the function of the Airbag Control Unit 98584-2N400?

The Airbag Control Unit 98584-2N400 is the central control module for the occupant protection system in the Nissan Almera N15. It processes signals from crash sensors and is responsible for precisely deploying airbags and tightening seat belts in the event of a collision. This is an OEM part number from Nissan.

As the brain of the passive safety system, this module continuously monitors all connected components. It analyzes data from acceleration and pressure sensors to assess the severity of a collision and activate the appropriate restraint systems. Therefore, proper functionality is essential for the safety of vehicle occupants.

In technical documentation and during parts searches, the alternative part number 285561N900 is also listed as compatible for this component. Both numbers designate functionally identical control units for the specified vehicle models.

Why does the Control Unit 98584-2N400 fail?

The most common cause of failure for the Control Unit 98584-2N400 is the storage of crash data after a collision. Additional defects arise from age-related wear of electronic components such as capacitors or from moisture ingress, leading to internal hardware malfunctions and communication issues.

Following a collision in which the airbags have deployed, the control unit deliberately locks itself. Relevant accident data is permanently stored in its internal EEPROM memory. This state is irreversible and cannot be resolved simply by clearing the fault memory at a workshop; the unit must undergo electronic reset.

Over time, electronic components on the circuit board itself may also fail. In particular, capacitors, sensors, or the microcontroller can suffer damage due to aging or thermal stress. Such hardware failures often result in internal errors that likewise require component-level repair.

How do you recognize a defect in the 98584-2N400?

A defect in the Control Unit 98584-2N400 primarily manifests as the airbag warning light remaining constantly illuminated on the instrument panel. Often, the diagnostic tool can no longer establish communication with the control unit, or specific fault codes—especially after a collision—cannot be cleared.

The clearest indication is the airbag indicator light, which fails to turn off after starting the vehicle. This signals a serious malfunction in the restraint system requiring immediate inspection.

Another clear symptom is complete loss of communication. If a workshop attempts to read the fault memory, the diagnostic tool receives no response from the airbag control unit. The module is no longer reachable within the vehicle’s network.

In other cases, specific fault codes appear—for example, related to side impact sensors—which persist even when the components themselves are intact. This points to an internal processing error within the control unit itself, particularly common after a collision when the crash-data lock is active.

In which vehicles is the Control Unit 98584-2N400 installed?

The Airbag Control Unit with part number 98584-2N400 is specifically designed for the Nissan Almera N15 series. It is used in both the original models from 1995 to 1998 and in the facelifted versions from 1998 to 2000. Airbag24 repairs this control unit for all mentioned variants.

At Airbag24, we repair this control unit for the following Nissan models:

Nissan Almera N15 (model years 1995–1998)

Nissan Almera N15 Facelift (model years 1998–2000)

This component is especially prevalent in trim levels such as the Nissan Almera N15 GX equipped with the GA14 gasoline engine.

How is the 98584-2N400 professionally repaired?

Professional repair at Airbag24 includes component-level diagnostics, precise erasure of stored crash data from the EEPROM, and replacement of defective electronic components. Following a final functional test, the control unit is fully operational again without requiring re-coding in the vehicle.

After sending the removed control unit to Airbag24, our technicians perform a detailed analysis of the circuit board. They identify not only obvious causes of failure but also potential weak points that could lead to future problems.

The core of the repair involves restoring the hardware. This includes desoldering and replacing faulty components such as capacitors, as well as professionally reprogramming the memory to unlock the crash-data lock. Finally, the unit undergoes comprehensive testing to ensure the correct functioning of all system components.

We offer a 12-month warranty on every repair performed. This process provides a reliable and sustainable alternative to the costly purchase of a new unit.

What are the benefits of a repair?

Repairing the original control unit is up to 70% cheaper than buying a new one from the manufacturer. Since the vehicle-specific configuration is preserved, no time-consuming reprogramming or coding is required. You get your own refurbished unit back, complete with a 12-month warranty.

The biggest advantage is the significant cost savings. While a new OEM control unit comes at a high price, repair offers an economically sensible solution to restore your vehicle’s full safety.

An additional key benefit is maintaining the original configuration. The repaired control unit is “plug-and-play”—it can be easily reinstalled without the need for expensive, time-consuming programming at an authorized dealer, saving you both time and extra workshop costs.

What shipping options does Airbag24 offer?

Airbag24 provides flexible and secure shipping options. You can send us your defective control unit free of charge or arrange a convenient UPS pickup. For returns, choose between free standard UPS shipping and faster UPS Express—both available with cash-on-delivery as well.

For sending your unit to us, you have two choices: either ship it yourself at no cost, or book a convenient UPS pickup from your preferred location, whether it’s your workshop or your home.

When returning your repaired unit, we offer several options to suit your needs:

Free standard UPS shipping (1–3 business days)

UPS Express shipping (1–2 business days)

Standard UPS shipping with cash-on-delivery (1–3 business days)

Express UPS shipping with cash-on-delivery (1–2 business days)

Of course, you’re also welcome to pick up your repaired control unit in person at our facility.