Airbag control unit with part number 98820 CD300

What does the airbag control unit 98820 CD300 do?

The control unit 98820 CD300 is responsible for the restraint system (SRS) in vehicles of Nissan. It analyses the signals from the crash sensors and decides in an accident within milliseconds on triggering the airbags and seatbelt pretensioners. After an accident, it stores crash data and locks itself.

While driving, the unit checks the system continuously. If it detects a fault, it indicates this via the airbag warning light in the instrument cluster.

Why does the control unit 98820 CD300 fail?

Stored crash data is the most common cause with the 98820 CD300, even if no airbag has deployed. Other causes include ageing components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

A commercially available diagnostic tool cannot delete crash data; Airbag24 takes this on during the repair.

A weak battery or jump-starting can cause voltage spikes that act on the electronics. Cold solder joints can impair the connection on the circuit board, while moisture and corrosion attack the contacts.

How can you tell that the 98820 CD300 is defective?

The airbag warning light in the instrument cluster stays on permanently or lights up intermittently. A fault message may also appear, the connection to the diagnostic tool may be disrupted, and the fault memory cannot be cleared, if the 98820 CD300 is defective.

These signs mean that airbags and seatbelt pretensioners may possibly fail to deploy in an emergency. A prompt examination is therefore sensible.

Which vehicles is the 98820 CD300 fitted in?

These vehicles are equipped with the control unit 98820 CD300: Nissan 350Z Z33 2nd Facelift (2007-2009), Z33 1st Facelift (2005-2007) and Z33 (2002-2005).

The overview below shows the models in detail.

• Nissan 350Z Z33 2nd Facelift (2007-2009)
• Nissan 350Z Z33 1st Facelift (2005-2007)
• Nissan 350Z Z33 (2002-2005)

Comparing the part number on the label of the removed unit with this page ensures that you have the right unit. Whether the unit itself is defective, however, can only be determined by reading out the fault memory, which also shows whether a plug or cable is causing the problem.

For the same vehicles, we also repair control units with the part numbers 28556 EV20A, 98820-EV20A, 98820CD600.

How does the repair of the 98820 CD300 work?

First you have the fault memory of the 98820 CD300 read out, and enclose the log with the unit. Then you disconnect the battery before the control unit is removed from the vehicle. Afterwards create the repair order online and send the unit.

At Airbag24 the unit is examined on the test bench, defective components are replaced and the stored crash data is deleted. A functional test concludes the work, and then your own unit is sent back.

Work at Airbag24 generally takes 3–4 working days. 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 CD300 get to Airbag24?

The 98820 CD300 goes off as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends the unit back to you by UPS.

Before packing, print out the repair order and enclose it; cushion the control unit shock-proof.