Airbag control unit with part number 52038939

What does the airbag control unit 52038939 do?

The airbag control unit 52038939 controls the restraint system (SRS) of Jeep. It processes the measured values of the crash sensors, decides in an accident within milliseconds on airbags and seatbelt pretensioners, and monitors the system continuously. After an accident it stores crash data and locks itself.

The manufacturer number Bosch 0285013269 is also printed on the housing. The unit reports detected faults via the airbag warning light in the instrument cluster.

Between sensors and airbags the control unit works continuously, because it checks lines and output stages even when nothing is happening. It stores faults in the fault memory.

Why does the control unit 52038939 fail?

The most common cause for the 52038939 is stored crash data after an accident, even without an airbag triggered. Other causes include aged components, moisture at plug connections and voltage spikes.

A normal diagnostic tool cannot remove crash data, so it remains in the unit.

The further causes in overview:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or jump starting

How can you tell that the 52038939 is defective?

A defect in the 52038939 shows itself by the airbag warning light in the instrument cluster, which lights permanently or intermittently, and by error messages on the display. The diagnostic tool then gets no connection to the control unit, and the fault memory cannot be erased.

Typical signs are:

• Airbag warning light lights permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool does not find the control unit
• Fault memory cannot be erased

In an emergency, airbags and seatbelt pretensioners may not be able to trigger. Therefore have each of these indications checked promptly.

Which vehicles is the 52038939 fitted in?

Check whether your vehicle is included using the list. Control unit 52038939 is fitted in these vehicles: Jeep Renegade BU Facelift (from 2018) and BU (2014-2018).

These vehicles belong to it in detail:

• Jeep Renegade BU Facelift (from 2018)
• Jeep Renegade BU (2014-2018)

Compare the part number on the label of the removed unit with this page. This only shows that you have the right unit. Have the fault memory read beforehand: only the 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 52042475, 52061844, 68256081AA, 68256081AB.

How does the repair of the 52038939 work?

First have the fault memory of the 52038939 read and enclose the log. Then disconnect the battery and only then remove the control unit. Next, create a repair order online and send the unit in well packed. At Airbag24, testing, repair and the functional test generally take 3–4 working days.

Airbag24 tests the unit on the test bench, replaces defective components and then erases the stored crash data. After that a functional test follows, and your own, repaired 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 52038939 get to Airbag24?

You send control unit 52038939 as a parcel or arrange a UPS collection for an extra charge. After the repair the unit comes back to you by UPS.

Enclose the printed repair order in the parcel. Pack the unit shock-proof so that it arrives undamaged.