Airbag control unit with part number LK4T-14B321-CE

What does the airbag control unit LK4T-14B321-CE do?

The airbag control unit LK4T-14B321-CE coordinates the restraint system (SRS) of Ford. In a crash, it evaluates the crash sensors and decides within milliseconds whether airbags and seatbelt pretensioners are triggered.

During operation it checks the system continuously. Any faults it finds are shown via the airbag warning light in the instrument cluster.

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

Why does the control unit LK4T-14B321-CE fail?

Stored crash data is the most common cause for the LK4T-14B321-CE, even if no airbag was triggered. Other causes are aged electronics, cold solder joints, moisture and corrosion, and voltage spikes.

A normal diagnostic tool cannot remove the crash data. The entry therefore remains, even when the vehicle appears inconspicuous.

• Aged electronic components lose reliability over time.
• Cold solder joints can interrupt the contact.
• Moisture and corrosion damage plug connections.
• Voltage spikes, for example from a weak battery or jump-starting, stress the electronics.

How can you tell that the LK4T-14B321-CE is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently. In addition, a fault message appears in the instrument cluster and the diagnostic tool cannot reach the control unit.

A fault memory that cannot be cleared confirms the finding. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

• The airbag warning light stays on permanently or intermittently.
• A fault message appears in the instrument cluster.
• The diagnostic tool finds no connection to the control unit.
• The fault memory cannot be cleared.

Which vehicles is the LK4T-14B321-CE fitted in?

The LK4T-14B321-CE is fitted in these vehicles: Ford Transit 7 ’14 (from 2014).

The list of vehicles for this part number is directly below:

• Ford Transit 7 ’14 (from 2014)

Comparing the part number on the label of the removed unit with this page only confirms that it is the correct unit. Have the fault memory read out beforehand as well, because only the log shows whether the control unit or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers BK2T-14B321-BF, BK3T-14B321-AC, DT1T-14B321-DF, KT1T-14B321-KD, LK4Z-14B321-C, LK4Z-14B321-E.

How does the repair of the LK4T-14B321-CE work?

Processing at Airbag24 takes 3–4 working days. First have the fault memory read out and attach the log, then disconnect the battery. Only then remove the control unit and create a repair order online.

This sequence is mandatory for safety reasons. Then pack the unit well and send it in.

Airbag24 checks the unit on the test bench, replaces defective components, deletes stored crash data and carries out a functional test. Then 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 LK4T-14B321-CE get to Airbag24?

You send the LK4T-14B321-CE as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Put the printed repair order into the parcel and pack the unit shockproof.