Airbag control unit with part number 3Q0959655T

What does the airbag control unit 3Q0959655T do?

The airbag control unit 3Q0959655T is the central control unit of the restraint system (SRS) for Skoda. It evaluates impact signals, decides in an accident within milliseconds which airbags and seatbelt pretensioners fire, and monitors the system continuously. It shows faults via the airbag warning light.

Monitoring covers wiring, sensors, airbags, seatbelt pretensioners and the power supply of the unit. Deviations are recorded in the fault memory.

After an accident it stores crash data and locks itself.

Why does the control unit 3Q0959655T fail?

Stored crash data is the most common cause: it arises after an accident, even if no airbag has deployed, and an ordinary diagnostic tool cannot erase it. Other causes are ageing components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

With the 3Q0959655T, crash data is therefore the first thing to look at whenever an accident was involved.

Ageing, cold solder joints and penetrating moisture gradually weaken the electronics. Voltage spikes from a weak battery or a jump start put additional strain on them.

How can you tell that the 3Q0959655T is defective?

The airbag warning light in the instrument cluster lights permanently or only at times. In addition, a fault message appears, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared.

This display clearly shows that the restraint system has detected a fault. It stands out visibly and cannot be overlooked.

In an emergency, airbags and seatbelt pretensioners may not trigger. A check is therefore advisable without delay.

Which vehicles is the 3Q0959655T fitted in?

The airbag control unit 3Q0959655T is fitted in these vehicles: Skoda Octavia 3 [5E] (2012-2017) and 3 [5E] Facelift (2017-2020).

The overview lists the vehicles recorded for this part number.

• Skoda Octavia 3 [5E] (2012-2017)
• Skoda Octavia 3 [5E] Facelift (2017-2020)

After removal, check the part number on the label against this page. This confirms that it is the correct unit. Have the fault memory read out beforehand: it clarifies 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 3Q0 959 655 AA, 3Q0 959 655 AC, 3Q0 959 655 AS, 3Q0 959 655 BH, 3Q0 959 655 CM, 3Q0 959 655 CN.

How does the repair of the 3Q0959655T work?

First have the fault memory read out and attach the log. Then disconnect the battery, and only then remove the control unit. Next you create a repair order online and send the well-packed unit. Testing, repair and checking at Airbag24 usually take 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components and erases the stored crash data. A function test follows, and then your own unit is returned.

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 3Q0959655T get to Airbag24?

You send the 3Q0959655T as a parcel or arrange a UPS collection for an extra charge. After repair Airbag24 sends it back to you by UPS.

Pack the control unit shock-proof and enclose the printed repair order.