Airbag control unit with part number 98820 9H605

What does the airbag control unit 98820 9H605 do?

The airbag control unit 98820 9H605 coordinates the restraint system (SRS) in Nissan. It detects a crash through the crash sensors, determines the triggering of airbags and seatbelt pretensioners, and monitors the system continuously. After a crash it locks itself; only the repair lifts the lock.

The control unit checks circuits, sensors and triggers. Any deviations found are stored in the fault memory.

The airbag warning light in the instrument cluster shows the driver a fault as soon as the system detects it.

Why does the control unit 98820 9H605 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

The crash data remains stored in the control unit. A diagnostic tool cannot reach it for erasure, so only the repair removes these entries.

Ageing electronics and cold solder joints develop over time. Moisture and corrosion damage the contacts in the plug connectors.

Voltage spikes, for example from a weak battery or a jump start, put additional strain on the electronics.

How can you tell that the 98820 9H605 is defective?

The airbag warning light in the instrument cluster stays on permanently or comes on intermittently, an error message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

A permanently lit warning light clearly indicates the defect. Even an intermittent glow points to a fault, even if the display goes out again afterwards.

If the connection to the diagnostic tool fails, or the fault memory stays full even after an attempt to clear it, the control unit or its connection is likely to be the problem. In an emergency, airbags and seatbelt pretensioners may then not be able to deploy.

Which vehicles is the 98820 9H605 fitted in?

The control unit 98820 9H605 is fitted in these vehicles: Nissan X-Trail T30 (2001-2003) and T30 Facelift (2003-2007).

The affected models are compiled in this list:

• Nissan X-Trail T30 (2001-2003)
• Nissan X-Trail T30 Facelift (2003-2007)

Comparing the label with this page only confirms that the removed unit is the right one. It does not clarify the cause. Only a read-out fault memory shows whether the control unit is defective or whether a plug or cable is responsible.

For the same vehicles, we also repair control units with the part numbers 41650EQ070, 988208H40C, 98820JH43A, A68-000U06.

How does the repair of the 98820 9H605 work?

You read out the fault memory and attach the log. Then you disconnect the battery and only then remove the control unit 98820 9H605. Next, you create a repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, erases the stored crash data and carries out a function test. Afterwards your own unit is sent back to you.

Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit 98820 9H605 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS.

Place the printed repair order in the parcel and pack the unit shockproof.