Airbag control unit with part number 65.77-5A19AC5-01

What does the airbag control unit 65.77-5A19AC5-01 do?

The airbag control unit 65.77-5A19AC5-01 forms the central control of the restraint system (SRS) in Toyota. It analyses the messages from the crash sensors, determines in a crash within fractions of a second which airbags and seatbelt pretensioners trigger, and continuously checks its own condition. After an accident it stores crash data and locks itself.

It shows faults via the airbag warning light in the instrument cluster, so you learn about them in everyday driving.

Why does the control unit 65.77-5A19AC5-01 fail?

The most common cause on the 65.77-5A19AC5-01 is crash data stored from an accident, even if no airbag has deployed. Other causes come into consideration, which can essentially be traced back to ageing, connections and power supply.

Crash data stays stored until it is erased during the repair, because a normal diagnostic tool cannot remove it.

The other causes at a glance:

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

How can you tell that the 65.77-5A19AC5-01 is defective?

On the 65.77-5A19AC5-01, a defect first shows up through the airbag warning light, which lights up permanently or intermittently. Added to that are fault messages or a diagnosis that cannot make contact with the control unit. A fault memory that cannot be cleared is a further warning sign.

Do not ignore the light, even if it only lights up intermittently. Have the finding clarified promptly, because airbags and seatbelt pretensioners may possibly fail to trigger in an emergency.

Which vehicles is the 65.77-5A19AC5-01 fitted in?

The 65.77-5A19AC5-01 is listed for Toyota only for this vehicle: Toyota Supra A90 (from 2019).

The line below lists the vehicle with this assignment.

• Toyota Supra A90 (from 2019)

Compare the part number on the label with this page first. That tells you only that you have the right unit, nothing more. The fault memory must be read out beforehand, because it clarifies whether the control unit itself or a plug or cable is affected.

How does the repair of the 65.77-5A19AC5-01 work?

First read out the fault memory, then disconnect the battery and only then remove the 65.77-5A19AC5-01. Afterwards create a repair order online and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components and erases stored crash data. A function test concludes the process.

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 65.77-5A19AC5-01 get to Airbag24?

You can send the 65.77-5A19AC5-01 in as a parcel, or have it collected by UPS for an extra charge. Airbag24 returns the unit by UPS after the repair.

Enclose the printed repair order with the parcel, and the unit must be packed shock-proof.