Airbag control unit with part number 8200817784

What does the airbag control unit 8200817784 do?

The airbag control unit 8200817784 is the central unit of the restraint system (SRS) in Dacia. It reads the signals from the crash sensors and, in the event of an accident, decides within a few milliseconds which airbags and seatbelt pretensioners to trigger. After an accident it stores crash data and locks itself.

While driving, the unit monitors the entire system. If it detects a deviation, it indicates this via the airbag warning light in the instrument cluster.

Triggering follows fixed evaluation rules. Which components are activated depends on the direction and severity of the impact, which the control unit calculates from the sensor values.

Why does the control unit 8200817784 fail?

Crash data is the most common cause, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Other causes are aged components, cold solder joints, moisture and corrosion, and voltage spikes.

The crash data is created in the control unit by the impact and remains stored there. This entry can exist even without an airbag triggering, and a usual set of tools does not remove it.

Only the unit itself can establish which of these causes applies. The other causes include:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump start

How can you tell that the 8200817784 is defective?

A defect becomes recognisable through an airbag warning light in the instrument cluster that stays on permanently or intermittently, through a fault message in the instrument cluster, through a missing connection to the diagnostic tool and through a fault memory that cannot be cleared.

• The airbag warning light stays on permanently
• The airbag warning light comes on only intermittently
• A fault message appears in the instrument cluster
• The diagnostic tool receives no connection to the control unit
• The fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may fail to trigger. The warning light is therefore not a mere display but the report of a fault.

Have the cause clarified promptly rather than ignoring the light.

Which vehicles is the 8200817784 fitted in?

The airbag control unit 8200817784 is fitted in these vehicles: Dacia Logan I (2004-2008) and I Facelift (2008-2013); Dacia Logan MCV I Facelift (2009-2013) and I (2006-2009).

The vehicle list for this part number is here:

• Dacia Logan I (2004-2008)
• Dacia Logan I Facelift (2008-2013)
• Dacia Logan MCV I Facelift (2009-2013)
• Dacia Logan MCV I (2006-2009)

Beforehand, compare the part number on the label with this page. It shows that you have the right unit, nothing more. Afterwards have the fault memory read, because only the log shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 6001551009, 8200307188, 8200702320, 8200702322, 8200769221, 8200769222.

How does the repair of the 8200817784 work?

Processing at Airbag24 usually takes 3–4 working days. It covers testing, repair and function test of the unit.

Before sending, the steps are yours: have the fault memory read, enclose the log, disconnect the battery and remove the control unit. Only then create the repair order online.

Airbag24 checks the unit on the test bench, repairs defective components, deletes stored crash data and carries out the function test. You then get your own unit back.

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 8200817784 get to Airbag24?

You send the unit as a parcel, or you book a UPS pickup for an extra charge. Airbag24 takes care of the return after the repair, likewise with UPS.

Enclose the printed repair order with the parcel. Pack the unit shock-resistant before handing it over.