Airbag control unit with part number YS6T14B056BC

What is the function of the airbag control unit YS6T14B056BC?

The airbag control unit YS6T14B056BC is the central control module of the passive safety system (SRS) in the fourth-generation Ford Fiesta (Mk4). Its primary task is to process signals from crash sensors, ensuring that airbags and seatbelt pretensioners are deployed precisely and promptly in the event of a collision.

As the “brain” of the restraint system, this module continuously monitors all connected components—such as airbags, seatbelt pretensioners, and sensors—for proper functionality. It stores any system faults in its fault memory and activates the airbag warning light to alert the driver.

The proper functioning of the control unit is critical for occupant safety, as a failure or malfunction could result in airbags failing to deploy or deploying incorrectly during an accident.

What defects are typical for the YS6T14B056BC?

The most common cause of failure for the YS6T14B056BC control unit is internally stored crash data following an accident, which locks the system. Other typical defects include internal electronic failures on the circuit board, such as faulty SMD components or voltage regulators, as well as issues caused by corrosion at the connector contacts.

After an accident in which the airbags have deployed, the control unit stores what is known as a “crash lock.” This lock prevents further use and must be professionally reset; simply clearing the fault memory is not sufficient.

Internal hardware defects are also a frequent source of problems. Individual electronic components, such as capacitors, MOSFETs, or memory chips, may fail. Cold solder joints or traces and connector contacts damaged by moisture and corrosion can likewise lead to malfunctions.

These fault patterns also occur in identical or compatible control units installed under part numbers 96FG14B056CE, 5S6T14B056JA, or 2S6T14B056EN in Ford models.

How do you recognize a defect in the YS6T14B056BC control unit?

The clearest indication of a defect is the permanently illuminated airbag warning light on the instrument cluster. Often, the control unit can no longer be accessed with a diagnostic tool, making precise fault analysis difficult and pointing to a serious internal issue.

The airbag warning lamp remains lit after starting the vehicle and does not turn off. This signals a safety‑related fault in the SRS that requires immediate inspection.

In many cases, communication between the diagnostic tool and the airbag control unit is no longer possible. As a result, the workshop cannot read the fault memory, rendering on‑vehicle diagnostics impossible and necessitating removal of the unit for testing on a test bench.

If communication is still possible, error codes are often recorded, indicating either an internal defect in the control unit or stored crash data. Such errors typically cannot be cleared permanently.

In which vehicles is the YS6T14B056BC control unit installed?

The airbag control unit with part number YS6T14B056BC is specifically designed for the fourth‑generation Ford Fiesta (Mk4 / ’96). It is used in model years approximately 1995–1999. Compatible variants with similar part numbers can also be found within this series.

At Airbag24, we repair this control unit for the following model:

Ford: Fiesta 4 ’96 (model years 1995–1999)

Our repair service also covers related part numbers considered compatible, such as 96FG14B056CE, 5S6T14B056JA, and 2S6T14B056EN.

How does the repair process work at Airbag24?

The repair process at Airbag24 is transparent and secure. After an initial diagnosis at your workshop, you send us the removed control unit. We perform a detailed analysis, fix the defect at the component level, reset crash data, and return the tested unit with a 12‑month warranty.

First, a qualified workshop should read the fault memory and document the fault log to confirm that the defect truly lies within the control unit itself. This avoids unnecessary effort.

Following removal, please pack the control unit securely and ship it to Airbag24. Upon arrival, it undergoes an incoming inspection on our specialized test bench to precisely locate the fault.

The actual refurbishment involves replacing defective electronic components, reworking solder joints, and cleaning corroded contacts. If necessary and permissible, stored crash data is erased, restoring the module to factory condition.

Finally, a comprehensive functional test ensures that the control unit operates flawlessly once again. You receive the repaired unit back, complete with a 12‑month warranty on the work performed.

What shipping options does Airbag24 offer?

For convenient processing, you can send your defective control unit to us free of charge or arrange a UPS pickup. For returning the repaired part, you have the choice between free UPS Standard shipping and faster Express options, including cash-on-delivery.

For sending the item to us, you can choose: ship it yourself, drop it off in person, or use the convenient UPS pickup service at a location of your choice.

Return shipping is standardly free via UPS Standard (1–3 business days). For an additional fee, we also offer UPS Express (1–2 business days). Both options can be combined with cash-on-delivery. Alternatively, you can pick up the repaired control unit directly from us.