Airbag control unit with part number 9654491180

What is the function of the airbag control unit 9654491180?

The airbag control unit 9654491180 from Autoliv is the central control module for the occupant protection system in Peugeot models. It processes signals from crash sensors and is responsible for precisely deploying airbags and seatbelt pretensioners in the event of a collision, thereby ensuring the safety of vehicle occupants.

Technically speaking, part number 9654491180—often accompanied by the additional designation 6545HK—is the brain of the entire restraint system. It maintains constant communication with the acceleration and pressure sensors distributed throughout the vehicle.

Based on the incoming data, the control unit determines within milliseconds whether activation of the safety systems is necessary. At the same time, it logs all system-relevant events and stores any detected faults for later diagnosis.

Why does the control unit 9654491180 fail?

The primary cause of failure for control unit 9654491180 is stored crash data following an accident that cannot be erased. Additional defects arise from internal communication errors, voltage spikes, moisture ingress, or faulty components on the circuit board. Often, related part numbers 9654491080 and 9654491170 are also affected.

The most common reason for repair is the permanent storage of crash data. After airbags or seatbelt pretensioners have been deployed, the unit internally locks itself to prevent improper reuse. This lock can only be released through specialized intervention.

Another typical defect is an internal error that disrupts communication with the vehicle’s diagnostic system. Fault codes such as B0100 or B0102 are often logged, indicating a malfunction within the control unit itself.

External factors can also lead to failure. These include undervoltage caused by a defective battery or alternator, short circuits in the vehicle’s electrical system, cable breaks, or moisture entering the housing, resulting in corrosion on the circuit board.

How do you recognize a fault in the 9654491180?

A defective airbag control unit 9654491180 primarily manifests as a continuously illuminated or intermittently flashing airbag warning light on the instrument cluster. Additionally, it is often impossible to access the control unit via an OBD diagnostic tool because it no longer establishes communication.

The clearest indication is the airbag warning light. It fails to extinguish after starting the vehicle, signaling a critical fault in the safety system. In this condition, the restraint systems would not deploy correctly in the event of a crash.

In the workshop, the fault is often evident when the tester cannot establish a connection to the airbag control unit. Reading the fault memory fails, complicating diagnosis but clearly pointing to a defective control unit.

In some cases, specific fault codes such as B0100 or B0102 are stored, directly indicating an internal defect or a communication issue within the control unit. An attached fault log aids in targeted repairs.

In which vehicles is the control unit 9654491180 installed?

The airbag control unit with part number 9654491180 is mainly used in Peugeot vehicles. Affected models include the 307 and 307 SW series from model years 2001 to 2009, including facelift versions. At Airbag24, this control unit is repaired for the aforementioned models.

At Airbag24, professional repair services for the control unit 9654491180 are offered for the following specific vehicle models:

Peugeot: 307 I (model years 2001–2005, plus facelift 2005–2009), 307 SW I (model years 2001–2005, plus facelift 2005–2009).

How does the repair process work at Airbag24?

After sending the removed control unit to Airbag24, a professional analysis is performed. The repair includes erasing crash data, replacing defective electronic components on the circuit board, and performing a software reset. Following this, the unit’s proper functionality is thoroughly tested. Two years' statutory liability for defects is provided on the repair.

The first step before removal is ideally to read out the fault memory. This log should be included with the control unit when sent to Airbag24 to expedite diagnosis.

In the workshop, the device is opened and subjected to a detailed inspection. Depending on the nature of the fault, stored crash data is deleted using specialized software, or defective components such as sensors and other parts on the circuit board are expertly replaced.

After restoration, the control unit undergoes a functional test to ensure all issues have been resolved and communication with the vehicle is once again flawless.

Is Repairing 9654491180 Worth It?

Repairing the airbag control unit 9654491180 is a cost-effective alternative to an expensive new purchase. While a brand-new part can cost up to 800 euros, repair offers substantial savings. Additionally, you receive 2 years' statutory liability for defects on the work performed.

According to market analyses, a new OEM control unit can range from 750 to 800 euros. In comparison, repair is significantly more affordable, helping you stay within budget without compromising safety.

The repaired original control unit is reinstalled in your vehicle, ensuring perfect fit and compatibility. With 2 years' statutory liability for defects on the repair, Airbag24 provides a reliable and secure solution to restore full functionality of your occupant protection system.