Airbag control unit with part number LK2T-14B321-BB

What does the airbag control unit LK2T-14B321-BB do?

The airbag control unit LK2T-14B321-BB controls the restraint system (SRS) in Ford. It processes the crash sensor data, decides within milliseconds in an accident whether the airbags and seatbelt pretensioners are triggered, and shows faults via the airbag warning light.

The system is in constant operation and is checked continuously by the unit. Deviations are stored in the fault memory, which a diagnostic tool can read out.

After an accident, the unit creates crash data and locks itself. In this way it preserves the accident data.

Why does the control unit LK2T-14B321-BB fail?

Crash data from an accident is most often the cause, even if no airbag has deployed. A normal diagnostic tool cannot erase it. Other causes include aged components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

• Aged electronic components
• Cold solder joints
• Moisture and corrosion at plug connectors
• Voltage spikes from a weak battery or jump-starting

Whether any of these causes applies only becomes clear once the unit has been examined.

How can you tell that the LK2T-14B321-BB is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently and so remains a visible sign of the condition. In addition, fault messages appear in the instrument cluster, the diagnostic tool cannot reach the control unit, and the fault memory cannot be cleared. In that case, airbags and seatbelt pretensioners may not deploy in a crash.

This warning concerns the safety of the occupants. Please have the system checked promptly if the warning light stays on.

Which vehicles is the LK2T-14B321-BB fitted in?

The control unit LK2T-14B321-BB is fitted in these vehicles: Ford Transit 7 ’14 (from 2014). You can match it to your own vehicle using the vehicle registration document and the part number.

The models with this part number are listed here:

• Ford Transit 7 ’14 (from 2014)

Compare the part number on the label of the removed unit with this page; this only confirms that it is the correct unit. Also have the fault memory read out. Only this result shows whether the control unit is defective or whether 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 LK2T-14B321-BB work?

First have the fault memory read out and attach the log to the unit. Then disconnect the battery, and only after that remove the control unit LK2T-14B321-BB. Create a repair order online and send in the well-packed unit; Airbag24 repairs it and returns your own unit.

This sequence is mandatory for safety reasons and belongs to every submission.

Airbag24 examines the unit, repairs defective components, deletes the stored crash data and carries out a functional test. These steps usually take 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 LK2T-14B321-BB get to Airbag24?

You send the unit as a parcel to Airbag24 or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order into the parcel, and pack the control unit LK2T-14B321-BB shockproof.