Airbag control unit with part number 602327600

What is the function of Airbag Control Unit 602327600?

The airbag control unit with part number 602327600 is the central control module for the occupant protection system, primarily in the Peugeot Partner II. It processes data from impact sensors and determines whether to deploy airbags and seatbelt pretensioners, ensuring the safety of vehicle occupants in the event of a crash.

Technically speaking, this ECU (Electronic Control Unit) serves as the brain of the entire restraint system. It connects peripheral crash sensors—positioned at strategic points throughout the vehicle—to the pyrotechnic initiators in the airbags and seatbelt pretensioners. In the event of a collision, the unit analyzes incoming signals and triggers the necessary components within milliseconds.

This component is an original or replacement part supplied by manufacturers such as Autoliv, specifically designed for models produced by the PSA Group (Peugeot/Citroën). The vehicle-specific software embedded in the control unit is precisely tailored to each model’s configuration, ensuring flawless operation.

Why does control unit 602327600 fail?

The most common cause of failure for control unit 602327600 is the storage of crash data after an accident, which locks the system for safety reasons. Other issues arise from moisture, water damage, or internal electronic malfunctions on the circuit board, requiring component-level repairs.

After airbags or seatbelt pretensioners are deployed, a permanent entry is recorded in the control unit’s memory—a so‑called “crash lock.” This prevents reuse until the data is professionally reset. This is not a malfunction but a safety‑related locking mechanism.

Hardware defects are also a frequent cause. Penetrating moisture can lead to corrosion on the circuit board and at solder joints, resulting in short circuits or communication failures. Internal errors in memory chips or other electronic components can likewise impair the unit’s functionality.

This control unit is also known under alternative part numbers 6590PK, 9653190980, 9803916880, 9665558380, 968938880, and 9648938880. A defect in any of these numbers manifests with identical symptoms.

How do you recognize a fault in control unit 602327600?

A defective airbag control unit 602327600 typically presents itself through a permanently or intermittently illuminated airbag warning light on the dashboard. Additionally, communication with the control unit via diagnostic tools may completely fail, and specific error codes such as B1000 or U1726 are stored in the fault memory.

The most obvious sign is the activated airbag warning light. It either fails to extinguish after engine start-up or suddenly illuminates during driving, signaling a fault in the restraint system that requires immediate inspection.

Another critical symptom is complete loss of communication. Workshops can no longer access the airbag control unit using diagnostic equipment to read fault codes or perform diagnostics—the unit does not respond to requests.

Specific error codes provide clear indications of the nature of the fault. Error code B1000 points to a general communication failure within the control unit, while U1726 explicitly indicates that communication with the airbag control unit is impossible.

In which vehicles is control unit 602327600 installed?

The airbag control unit 602327600 is primarily installed in various trims of the Peugeot Partner II. At Airbag24, we repair this unit for standard models from 2008 to 2012, as well as for facelift versions from 2012 to 2015 and from 2015 to 2019—models that are also compatible with equivalent Citroën variants.

At Airbag24, we have successfully repaired control units bearing part number 602327600 and its technically compatible counterparts for the following specific models:

Peugeot Partner II (model years 2008–2012)

Peugeot Partner II First Facelift (model years 2012–2015)

Peugeot Partner II Second Facelift (model years 2015–2019)

Since Peugeot and Citroën share many components, this unit—or a technically identical one—can also be found in other group models, such as the Citroën Jumper.

Is it worth repairing control unit 602327600?

Yes, repair represents an economically and technically sensible alternative to costly new purchases. Compared to a brand‑new unit, often priced at several hundred euros, you save significantly. Moreover, there’s no need for time‑consuming re‑coding, as the vehicle‑specific software remains intact. You also receive a 12‑month warranty on the repair.

A key advantage is preserving the vehicle’s original configuration. Since the control unit’s software remains unchanged, it can be easily reinstalled after repair (plug-and-play). This eliminates the need for time-consuming programming or re-learning the system at a specialized workshop.

The repair restores the airbag system to full safety and functionality. It is not only more cost-effective but also a sustainable solution, as a fully functional component is reused, helping to avoid electronic waste.

How does the repair process work at Airbag24?

After you send the removed control unit 602327600 to Airbag24, our technicians perform a thorough diagnosis. The repair includes professionally erasing stored crash data and addressing any hardware defects. The unit then undergoes a comprehensive functional test.

The process begins with safely removing the control unit from the vehicle. Pack it carefully and send it to us along with the completed repair order.

Upon arrival at Airbag24, the unit is first inspected for the faults described by the customer. The core of the repair involves completely clearing stored crash data and permanent error codes, followed by initializing the control unit. In cases of hardware defects, faulty electronic components on the circuit board are expertly replaced.

Before returning the repaired unit, each one undergoes a final functional test to ensure seamless communication and proper operation of all systems. We provide a 12-month warranty on every repair.

What shipping options are available at Airbag24?

To send your defective control unit to Airbag24, you can either ship it yourself free of charge or arrange a convenient UPS pickup at your preferred location. For return shipping, we offer free standard UPS delivery as well as faster express options, both with the option of cash-on-delivery.

For outbound shipping, you have two choices: send the package yourself or use our convenient pickup service. Simply book an online UPS pickup for any weekday at your address.

After the repair is completed, we offer several return shipping options:

Free standard UPS delivery (1–3 business days)

UPS express delivery (1–2 business days)

In addition, both shipping methods can be combined with cash-on-delivery. Alternatively, you may choose to pick up the repaired unit in person at our facility.