Airbag control unit with part number 89170-52L30

What does the airbag control unit 89170-52L30 do?

The airbag control unit 89170-52L30 coordinates which airbags and seatbelt pretensioners fire in Toyota in an emergency. To do this, it reads the crash sensors and acts within milliseconds.

It also monitors the system continuously. If it detects a fault, it reports this via the airbag warning light in the instrument cluster.

The unit records crash data from an accident and then remains locked.

Why does the control unit 89170-52L30 fail?

Stored crash data is the most common cause: it sits in the memory after an accident, even if no airbag was triggered, and an ordinary diagnostic tool cannot remove it. In addition, ageing electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are possible causes.

The crash memory is a record of the impact and stays in the unit until it is erased during the repair.

Electronic components change over time. Cold solder joints can lose contact, and moisture or corrosion impair plug connections.

Voltage spikes arise, for example, from a weak battery or from connecting a jump start, and they stress the circuits.

How can you tell that the 89170-52L30 is defective?

A defect shows itself through an airbag warning light that lights up permanently or intermittently, a fault message in the instrument cluster, a diagnostic tool without connection and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

• Airbag warning light in the instrument cluster, lit permanently or intermittently
• Fault message in the instrument cluster
• No connection from the diagnostic tool to the control unit
• Fault memory cannot be cleared

The light is an unmistakable sign. So have the findings checked as soon as any of these signs appear.

Which vehicles is the 89170-52L30 fitted in?

The 89170-52L30 is fitted in these vehicles: Toyota Aqua NHP10 (2011-2015), NHP10 1st Facelift (2015-2017) and NHP10 2nd Facelift (2017-2021).

The following overview shows which vehicles belong to this part number.

• Toyota Aqua NHP10 (2011-2015)
• Toyota Aqua NHP10 1st Facelift (2015-2017)
• Toyota Aqua NHP10 2nd Facelift (2017-2021)

Matching the part number on the label of the removed unit with this page confirms that you have the right unit. Having the fault memory read out, on the other hand, shows whether the control unit itself is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 152100-4560, 89170-42D50.

How does the repair of the 89170-52L30 work?

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

Airbag24 checks the unit, repairs defective components, erases stored crash data and carries out a function test. Then your own unit goes back to you. Processing at Airbag24 usually takes 3–4 working days.

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 89170-52L30 get to Airbag24?

Either you send the control unit in as a parcel, or you arrange a UPS collection for an extra charge. After the repair, UPS brings the unit back to you.

Enclose the printed repair order, and protect the unit against knocks with its packaging.