Airbag control unit with part number 98820-40U20

What is the function of the airbag control unit 98820-40U20?

The airbag control unit 98820-40U20, manufactured by Autoliv, is the central control module of the occupant protection system in the Infiniti I30 of the A33 series. It is identical to the original Infiniti part number K8515-40U20 and processes data from crash sensors to precisely deploy airbags and seatbelt pretensioners in the event of a collision.

As the “brain” of the safety system, this ECU (Electronic Control Unit) continuously monitors all connected components, such as sensors, igniters, and seatbelt pretensioners. Its specific design for the Infiniti I30 A33 ensures proper functionality and seamless communication within the vehicle’s data network.

The part number 98820-40U20 is listed in official parts catalogs as an OEM equivalent, confirming its direct compatibility and precise fit for the intended vehicle series.

Why does the control unit 98820-40U20 fail?

The most common cause of failure for the control unit 98820-40U20 is the storage of crash data after an accident, which triggers an internal lockout. Other defects arise from internal electronic malfunctions, voltage spikes in the vehicle’s electrical system, or age-related wear of components, leading to complete deactivation of the entire airbag system.

Following a collision, the unit writes irreversible crash-event data into its internal memory. This lockout is a manufacturer‑imposed safety feature that prevents reuse without professional inspection and repair.

Internal electronic faults may manifest as specific diagnostic trouble codes in the fault memory. For the part number 98820-40U20, typical codes include B1000, indicating a general control unit or communication error, and B1018, signaling a specific internal module fault. A workshop diagnosis is essential to rule out issues with external components.

How do you recognize a defect in the 98820-40U20?

The primary symptom of a defective airbag control unit 98820-40U20 is the permanently illuminated airbag warning light (SRS indicator) on the instrument panel. In this state, the system is completely disabled, posing a significant safety risk during an accident since neither airbags nor seatbelt pretensioners will deploy.

During a workshop diagnosis, the control unit may become unresponsive—no connection can be established with the diagnostic tool, or previously mentioned internal fault codes such as B1000 or B1018 are read out.

Since the airbag function is blocked when defective, immediate inspection at a specialized workshop is strongly recommended to restore driving safety.

In which vehicles is the control unit 98820-40U20 installed?

The airbag control unit with part number 98820-40U20 was specifically designed for the Infiniti I30 of the A33 series. At Airbag24, we professionally repair this control unit for the following specific models and model years to fully restore the safety system’s functionality.

At Airbag24, the part number 98820-40U20 is refurbished for these models:

Infiniti I30 A33 (1998–2001)Infiniti I30 A33 Facelift (2001–2004)

How does the repair process work at Airbag24?

After sending the removed control unit to Airbag24, a systematic analysis is performed to identify the fault. Internal defects are then repaired at the component level, and stored crash data is completely erased. The unit is restored to its functional “plug-and-play” condition and becomes immediately operational upon reinstallation.

The process begins with the proper removal of the control unit from the vehicle. It is typically located beneath the center tunnel or one of the front seats. Before disassembly, the vehicle battery must be disconnected to prevent accidental airbag deployment. These tasks should only be carried out by trained professionals.

Upon receipt at Airbag24, technicians conduct a comprehensive diagnosis to pinpoint the exact cause of the malfunction. The repair includes fixing any defects and professionally erasing crash data. Following successful restoration and final testing, the control unit is returned to the customer. We provide a 12-month warranty on every repair.

Is repairing the 98820-40U20 worthwhile?

Yes, repair is the most economical and technically sound solution. Compared to the costly replacement of a new unit, refurbishment offers substantial cost savings. Additionally, the repaired control unit is restored to a “plug-and-play” state, often eliminating the need for time-consuming reprogramming of the vehicle’s systems.

A new original control unit not only comes with high costs but, in many cases, also requires subsequent programming and adaptation to the specific vehicle. By contrast, repair restores the full functionality of the original part. Stored crash data is reliably erased in the process—something that cannot always be guaranteed with a used replacement part.

Through refurbishment, you receive an exact-match original control unit, avoiding compatibility issues and enabling a quick, safe restoration of the occupant protection system.

What shipping options are available?

To send your defective control unit to Airbag24, you can either deliver it yourself free of charge or ship it in. Alternatively, we offer convenient UPS pickup from your preferred location. For the return shipment, free and express options are available, including cash-on-delivery.

Shipping to Airbag24:

- Free self‑delivery or mailing

- UPS pickup from your chosen location

Return shipping from Airbag24:

- UPS standard shipping (free)

- UPS express shipping

- UPS standard shipping with cash-on-delivery

- UPS express shipping with cash-on-delivery

- In‑store self‑pickup