Airbag control unit with part number HB5T-14B321-BA

What does the airbag control unit HB5T-14B321-BA do?

In the vehicle from Ford, the airbag control unit HB5T-14B321-BA coordinates the SRS restraint system. It evaluates the measurement values from the crash sensors and, in an emergency, determines which airbags and seatbelt pretensioners are triggered. At the same time, it checks the entire system continuously for faults.

During normal driving, the unit works in the background and waits for signals from the sensors. If it detects a fault, it reports this to the airbag warning light in the instrument cluster, so that you notice the warning.

After an accident, the control unit stores crash data and then locks itself. Only a repair ends this lock.

Why does the control unit HB5T-14B321-BA fail?

The most common cause is stored crash data after an accident, even if no airbag has deployed. Other causes are aged components, cold solder joints, moisture at plug connectors and voltage spikes. Which of these applies to the HB5T-14B321-BA only becomes clear through testing.

Crash data remains even after a diagnostic tool is connected, until Airbag24 removes it during the repair. A normal reading tool does not get you anywhere here.

Aged components and cold solder joints impair the function over the years. Moisture and corrosion at plug connectors disrupt the contact, which can make itself felt gradually.

Voltage spikes, for example from a weak battery or after a jump start, put additional strain on the electronics.

How can you tell that the HB5T-14B321-BA is defective?

The airbag warning light in the instrument cluster lights up constantly or intermittently as soon as something is wrong with the HB5T-14B321-BA. A fault message may also appear, and the diagnostic tool finds no connection to the control unit.

In an emergency, this means that airbags and seatbelt pretensioners may not deploy. So take the warning seriously and have it checked.

A fault memory that cannot be cleared is also a sign that the system needs to be checked.

Which vehicles is the HB5T-14B321-BA fitted in?

The HB5T-14B321-BA is fitted in these vehicles: Ford Explorer 5 (2011-2019).

Here are the vehicles for which this part number is stored:

• Ford Explorer 5 (2011-2019)

Comparing the part number on the label of the removed unit with this page confirms that you have removed the correct unit. It says nothing about the defect. Have the fault memory read out beforehand, because the log shows whether the control unit itself is affected or whether a plug or cable is involved.

For the same vehicles, we also repair control units with the part numbers BB5T-14B321-AH, DB5T-14B321-AE, DB5T-14B321-AF, DB5T-14B321-AG, EB5T-14B321-AA, GB5T-14B321-AC.

How does the repair of the HB5T-14B321-BA work?

First have the fault memory read out and attach the log, then disconnect the battery and only then remove the HB5T-14B321-BA. Next, create a repair order online and send in the well-packed unit. Testing, repair and function test at Airbag24 usually take 3–4 working days.

Airbag24 checks the control unit on the test bench and repairs defective components. The stored crash data is then deleted, a function test follows, and your 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 HB5T-14B321-BA get to Airbag24?

Either you send the HB5T-14B321-BA in as a parcel, or you arrange a UPS collection for an extra charge. Airbag24 then also returns the repaired unit to you by UPS.

Print out the repair order, put it in the parcel and pad the unit shock-proof.