Peugeot 306 Break airbag control unit repair⁽¹⁾

What should be considered with Peugeot 306 Break airbag control units?

The airbag control unit of the Peugeot 306 Break evaluates the crash sensors, triggers the airbags and seatbelt pretensioners and monitors the entire airbag system. If the system detects a fault, the airbag warning light comes on. Airbag24 repairs the control unit you send in and clears the stored crash data.

After an accident in which airbags or seatbelt pretensioners were triggered, the control unit stores crash data and locks itself. Typical causes are ageing of the electronics, overvoltage, for example from a short circuit or battery problems, corrosion on connectors and contacts, and communication problems on the CAN bus.

Airbag control units are safety-relevant. Work on the airbag system should therefore be left to a specialist workshop.

Which Peugeot 306 Break generations are there?

The Peugeot 306 Break is built in two series: series I from 1994 to 1997 and series I Facelift from 1997 to 2002. Which series is fitted in your vehicle follows from its year of manufacture and the vehicle identification number (VIN).

The series I Facelift is the revised version of series I. Each control unit belongs to a specific series and production period, so check the year of manufacture and the part number before commissioning a repair.

• I (1994–1997): series before the facelift
• I Facelift (1997–2002): series after the facelift

How do I identify my Peugeot 306 Break airbag control unit?

The part number on the label of the control unit determines the exact version. Together with the year of manufacture and the equipment of your vehicle, it identifies the matching control unit.

Without these details it is not possible to say with certainty which version is fitted. Known part numbers for this control unit in the Peugeot 306 Break I include:

• 9633504080
• 9633621280
• 9636894180
• 9637547280
• 9643825880

The supplier Autoliv is recorded in our data. Fault codes help with classification: B1000 indicates an internal fault in the control unit, U0151 a lost communication with the control unit, and A601 a short circuit to positive in the driver airbag firing circuit, stage 1. A single code does not prove faulty hardware, however; only testing at a specialist workshop shows what is actually present.

Which airbag equipment does the Peugeot 306 Break have?

The Peugeot 306 Break typically had a driver airbag and a front passenger airbag as standard. Front side airbags were available depending on engine and trim; whether they are fitted in your vehicle depends on its equipment.

Datasheets for the Style trim of model year 2000 list a front passenger airbag and front side airbags as standard. Side airbag data differs by engine, so the actual equipment of the vehicle is decisive.

The model name alone does not reveal which airbags are fitted. What matters is the equipment of the individual vehicle, which follows from the vehicle documents and the vehicle identification number.

Here is how your control unit gets repaired: have the fault memory read. The specialist workshop then disconnects the battery and removes the control unit. Next, create a repair order online and send the removed control unit, well packed, to Airbag24.

Processing usually takes 3–4 working days: checking, repairing and testing.

The repaired control unit returns with all vehicle data and is ready for use as soon as it has been refitted — no coding or programming is required.