Airbag control unit with part number DR33-14B321-AB

What does the airbag control unit DR33-14B321-AB do?

At Ford, the airbag control unit DR33-14B321-AB regulates the restraint system (SRS). It evaluates the crash sensors and decides within milliseconds on the triggering of airbags and seatbelt pretensioners.

It also monitors the system and shows faults via the airbag warning light in the instrument cluster.

After an accident, it stores crash data and locks itself.

Why does the control unit DR33-14B321-AB fail?

Stored crash data is the most common cause; it arises after an accident, even if no airbag was triggered, and cannot be deleted with a normal diagnostic tool. Further causes are aged electronics, cold solder joints, moisture and corrosion on plugs, and voltage spikes.

It remains in the memory until it is specifically deleted.

Electronic components age, solder joints can go cold, and moisture and corrosion impair the contact. Voltage spikes, for example from a weak battery or from jump-starting, add further strain.

How can you tell that the DR33-14B321-AB is defective?

A defect shows up as an airbag warning light in the instrument cluster that lights permanently or intermittently. Added to this are a fault message, a disturbed connection to the diagnostic tool and a fault memory that cannot be cleared.

Airbags and seatbelt pretensioners may then possibly not trigger in an emergency. A precise check of the system is therefore necessary.

The warning light shows a fault as soon as the system detects it.

Which vehicles is the DR33-14B321-AB fitted in?

The DR33-14B321-AB is found at Ford in these models: Ford Mustang 5 S197 (2004-2014).

The vehicles in detail:

• Ford Mustang 5 S197 (2004-2014)

Matching the part number on the label of the removed unit with this page only shows that it is the right unit. Whether the control unit is defective, or a plug or cable causes the fault, is shown only by the read-out fault memory. Have it read out beforehand.

For the same vehicles, we also repair control units with the part numbers ML3Z-14B321-Z, ML3Z14B321A, MR3T-14B321-EA.

How does the repair of the DR33-14B321-AB work?

It begins with reading out the fault memory, whose log goes into the parcel. Then you disconnect the battery; only after that do you remove the control unit. Next, you create the repair order online and send the unit in.

Airbag24 checks the unit on the test bench, replaces defective components, deletes stored crash data and carries out a function test.

Processing at Airbag24 usually takes 3–4 working days, after which your own unit goes back 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 DR33-14B321-AB get to Airbag24?

The unit goes to Airbag24 either as a parcel or with a UPS collection that you book for an extra charge. The return after the repair is made by UPS.

You print out the repair order and put it into the parcel. The packaging must be shock-proof.