Airbag control unit with part number 59001158

What is Airbag Control Unit 59001158 and what does it do?

The part number 59001158 often refers to the airbag slip ring in the aftermarket, but in the Peugeot Bipper I and related models, it is also used in the context of the central airbag control unit. This control unit serves as the central brain of the passive safety system. It processes data from the acceleration sensors and determines whether and when airbags and seatbelt pretensioners should be deployed.

It’s important to note that part number 59001158 applies to two distinct components within the airbag system: on one hand, the slip ring (winding spring) in the steering wheel, which provides electrical connectivity to the driver’s airbag and steering wheel buttons; on the other hand, as referenced in this repair offer, it denotes the actual airbag control unit (ACU), typically installed in the center tunnel.

This repair service focuses exclusively on the electronic airbag control unit. It acts as the “brain” of the restraint system and works closely with other vehicle control modules. For the Peugeot Bipper I, this control unit is also known under comparison numbers 1610617380 and 1372894080, all of which are covered by this repair.

What types of failures occur with part number 59001158?

The most common issue with the airbag control unit is the storage of crash data after an accident, even if only the seatbelt pretensioners were activated. This lockout is permanent and prevents further operation. Other causes include internal hardware faults such as defective memory chips (EEPROM), power supply problems, or corrosion due to water ingress. If the fault lies in the slip ring, it usually results from mechanical breakage of the conductive traces.

A major failure mode is the permanent retention of crash information. Following a collision, the control unit locks itself internally to prevent unintended re‑deployment. This condition cannot be cleared using standard workshop diagnostic tools and requires specialized electronic repair.

Defects can also occur without any accident. Internal memory errors in EEPROM or flash chips—caused by aging or voltage spikes—can lead to complete system failure. Similarly, hairline cracks at solder joints on processors or other components may develop due to vibrations, impairing functionality.

Conversely, if a defect is diagnosed in the slip ring associated with part number 59001158, the cause is typically mechanical damage. The flexible conductive trace inside breaks from frequent steering movements or improper installation, resulting in an interruption of the electrical circuit to the driver’s airbag.

How can you recognize a fault in the Peugeot Bipper’s airbag system?

The primary symptom of a faulty airbag control unit is the airbag warning light constantly illuminated on the instrument cluster. Often, error codes stored in the fault memory cannot be cleared, or communication with the control unit via a diagnostic tool becomes impossible altogether. In cases involving a defective slip ring, the horn or steering wheel buttons may also fail.

A persistently lit airbag indicator light is the clearest sign. Unlike normal operation, it does not extinguish after starting the vehicle, indicating a system‑critical fault either within the control unit itself or in one of its connected components.

Another clear indication is when a diagnostic tool can read error codes, but they immediately reset themselves upon attempting to clear them. Typical entries point to an “internal control unit error” or stored crash data.

In some cases, the control unit becomes completely inaccessible to diagnostic testers, suggesting a severe internal hardware failure—such as issues with the power supply or the communication processor.

If the problem originates in the slip ring, it often manifests as the specific error code “Driver’s airbag ignition circuit resistance too high/low,” accompanied by simultaneous malfunctions of the horn and multifunction buttons on the steering wheel.

In which vehicles is component 59001158 installed?

At Airbag24, repairs for the airbag control unit bearing part number 59001158 are primarily offered for the Peugeot Bipper I (model years 2007–2015). As this vehicle represents a joint development, technically identical control units are also fitted in the Citroën Nemo and Fiat Fiorino. Additionally, the slip ring with this part number appears in the Fiat Ducato (Type 250).

The repair service covers the following models and platforms where control units bearing numbers 59001158, 1610617380, or 1372894080 are used:

Peugeot: Bipper I (Type AA_)

Citroën: Nemo

Fiat: Fiorino

How does the airbag control unit repair process work at Airbag24?

After removal by a qualified workshop and shipment to Airbag24, the control unit undergoes a professional repair procedure. This begins with an initial inspection on a specialized test bench. Next, stored crash data is erased, and any defective electronic components on the circuit board are replaced. Following a final functional check, the device is fully operational again. All repairs come with a 12-month warranty.

First, the control unit is removed from the vehicle by a certified workshop. It is crucial to observe all safety regulations when working on airbag systems, especially disconnecting the vehicle battery.

Upon arrival at Airbag24, a comprehensive diagnosis is performed. Technicians read out the internal memory and test communication as well as the activation of all ignition circuits on a simulation test bench.

The refurbishment includes safely resetting the crash data so that the control unit is once again recognized as accident-free. In cases of hardware defects, faulty components such as memory chips, voltage converters, or driver ICs are replaced with new, high-quality parts, and critical solder joints are reworked.

Finally, a thorough final inspection is carried out, during which all functions are tested again under simulated driving conditions. Only if the control unit passes all tests without issue is it approved for return shipment. After reinstalling it in the vehicle, you simply need to clear the fault memory.

What shipping options are available at Airbag24?

You can send your defective component to Airbag24 yourself or arrange a convenient UPS pickup from a location of your choice. For returning the repaired unit, Airbag24 offers free standard UPS shipping. If you require faster delivery, UPS Express shipping is available, along with both options as cash-on-delivery shipments. Personal collection is also possible.

For sending the item to us, you have two choices: either take the package to the post office yourself and mail it to us, or use UPS’s convenient pickup service, which collects the package directly from your location.

Return shipping is provided free of charge by default via standard UPS delivery (1–3 business days).

For quicker delivery, you can opt for UPS Express shipping (1–2 business days). Both shipping methods are also available as cash-on-delivery shipments. Alternatively, upon prior arrangement, you may pick up your repaired control unit directly from our facility.