Airbag control unit with part number 28556 3LS1E

What does the airbag control unit 28556 3LS1E do?

The airbag control unit 28556 3LS1E is the central control unit of the restraint system of Nissan. It captures impact signals, selects the appropriate airbags and seatbelt pretensioners within fractions of a second, and monitors the system permanently.

The unit shows the results of this monitoring via the airbag warning light. It therefore works in the background until a fault occurs.

After an accident, it stores crash data and locks itself.

Why does the control unit 28556 3LS1E fail?

The most common cause is crash data from an accident, even if no airbag was triggered. A normal diagnostic tool does not erase it. In addition, ageing components, cold solder joints, moisture on connectors and voltage spikes can cause the 28556 3LS1E to fail.

The crash data remains in the memory of the control unit, even if the vehicle shows no external damage. Airbag24 removes it as part of the repair.

Other causes are less easy to spot. Over the years electronic components age, solder joints can go cold, and moisture or corrosion on connectors disturbs the connection. Voltage spikes, for example from a weak battery or a jump start, can also stress the unit.

How can you tell that the 28556 3LS1E is defective?

A defect shows up as the airbag warning light in the instrument cluster, which can stay on permanently or light up intermittently. Further signs point to the control unit as well.

Typical signs are:

• Airbag warning light stays on permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool receives no connection to the control unit
• Fault memory cannot be cleared

If any of these signs occur, airbags and seatbelt pretensioners may fail to deploy in an emergency. Have the system checked promptly.

Which vehicles is the 28556 3LS1E fitted in?

The control unit 28556 3LS1E is fitted in these vehicles: Nissan NV200 M20 (2009-2021).

Here is the list of vehicles recorded for this part number.

• Nissan NV200 M20 (2009-2021)

Carry out the label comparison on the removed unit. If the part number matches this page, you have the correct unit.

Whether the control unit itself is defective only becomes clear from the fault memory, so have it read out before removal. A connector or cable may be the cause instead.

For the same vehicles, we also repair control units with the part numbers 285563LS0E, 98820-1PD0B.

How does the repair of the 28556 3LS1E work?

First have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit. Next, create a repair order online and send the unit in well packed.

At Airbag24 the unit is checked on the test bench, defective components are replaced and the crash data is deleted. A function test follows.

Processing usually takes 3–4 working days. Your own unit then comes 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 28556 3LS1E get to Airbag24?

You send the control unit 28556 3LS1E as a parcel or book a UPS collection for an extra charge. After the repair, UPS returns it to you.

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