Airbag control unit with part number 400 959 655

What does the airbag control unit 400 959 655 do?

The airbag control unit 400 959 655 is the central control unit of the restraint system (SRS) for Lamborghini. It evaluates the signals from the crash sensors and decides within milliseconds, in the event of an accident, which airbags and seatbelt pretensioners are triggered. After an accident, it stores crash data and locks itself.

During operation it continuously monitors the entire restraint system and reports faults via the airbag warning light in the instrument cluster. The lock is only lifted by repairing the unit.

Why does the control unit 400 959 655 fail?

The most common cause is crash data that remains in the memory after an accident, even if no airbag was triggered. On the 400 959 655, this data cannot be erased with a normal diagnostic tool. Other causes include aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or jump-starting.

The crash data stays in the memory until Airbag24 erases it during the repair. The other causes are of a more general nature: electronics age, and plug connections can lose contact due to moisture.

How can you tell that the 400 959 655 is defective?

A defect in the 400 959 655 shows up as the airbag warning light in the instrument cluster staying on permanently or intermittently, as an error message, as a lack of connection to the diagnostic tool, or as a fault memory that cannot be cleared. In an emergency, the airbags and seatbelt pretensioners may then fail to trigger.

The airbag warning light in the instrument cluster indicates the fault as soon as the system has detected it. Please have this indication checked promptly.

Which vehicles is the 400 959 655 fitted in?

The airbag control unit 400 959 655 is fitted in these vehicles: Lamborghini Gallardo Coupé (2003-2008). Whether your vehicle is one of them can quickly be clarified with the unit in hand.

The list shows the vehicles recorded in our assignment for this part number.

• Lamborghini Gallardo Coupé (2003-2008)

(a) Compare the part number on the label of the removed unit with this page; this only confirms that it is the correct unit. (b) Have the fault memory read out beforehand, because only that 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 408959655.

How does the repair of the 400 959 655 work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit 400 959 655. Next, create a repair order online and send the unit in well packed; Airbag24 inspects and repairs it, erases the crash data and tests the function.

Inspection, repair and testing at Airbag24 usually take 3–4 working days. After that, your own unit is returned 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 400 959 655 get to Airbag24?

You send the control unit 400 959 655 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you via UPS.

Put the printed repair order into the parcel and pack the control unit shock-resistant.