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Citroën C4 II airbag control unit repair
Citroën C4 II airbag control unit repair at Airbag24
Airbag24 repairs defective airbag control units professionally and affordably. Both private customers and workshops can order without registration and benefit from fast processing, 2 years' statutory liability for defects and plug&play installation.
Airbag24 works with state-of-the-art diagnostic technology and specialised repair processes. Because defective control units often involve only individual components, a professional overhaul can be considerably cheaper than buying new.
Our advantages: no registration required, a direct online ordering process for B2B and B2C customers, express shipping and comprehensive quality testing. The repaired control unit works like a new part.
Notes
Mounting position
Repair type
Which repair matches your fault code?incl. VAT plus shipping
Not sure? Just send us an enquiry or give us a call — we're happy to advise you.
4.8Google reviews of our shop(246)
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Matching part numbers
Your part number isn't listed? The list isn't complete – we can usually repair it anyway. Simply create a repair order, or ask us first.
Repair time
Our estimated repair time for this product is about: 3–4 business days
Which repair matches your fault code?
Below your code you can see what needs to be done.
Your error code isn't listed? The list isn't complete – we can usually repair it anyway. Simply create a repair order, or ask us first.
Specifications
- Make
- Citroën
- Model
- Citroën C4
- Series
- II (2010-2015)II Facelift (2015-2018)
Shipping & repair from Germany
Airbag24 repairs your component in Berlin — usually within 3–4 working days.
Standard shipping within Germany is free; we normally return your part by UPS.
You pay for and insure the inbound shipment to us. On explicit request we ship by express — the extra cost is borne by the customer.
If you withdraw from the contract, you bear the cost of returning the item.
Google reviews
4.8Based on 246 reviewsView all reviews →
Works like a charm!
Everything went perfectly, I can only recommend it.
Automatically translated · Original: German
From the first phone call, the order processing, to the shipping everything was done very quickly and professionally. Now I still have to send the repaired unit to the Swedish workshop and then hopefully the Honda can finally pass the HU there again (failed because of the red light for the airbag). Today the message came from SWE, the car is running again, the red light is off and the HU was also passed. Once again many thanks for the help in need. Keep it up and maybe word will also spread in SWE that Airbag 24 does great work. Regards Gerd
Automatically translated · Original: German
Airbag control unit Fiat 500 was broken. Hard to believe but they can really repair it! Recommendation!!
Automatically translated · Original: German
Everything worked out great! Read out fault memory, sent it in, received offer and sent in the defective control unit. Got it back repaired after 3 days, price exactly as in the offer. It can't get any better 👍
Automatically translated · Original: German
What is a Citroën C4 II airbag control unit?
The Citroën C4 II airbag control unit is the central safety unit that activates all occupant restraint systems in the event of an accident. It monitors sensors, stores crash data, and ensures the proper functioning of all airbag modules in the vehicle, playing a crucial role in occupant safety.
It acts as the brain of the airbag system and processes information from various sensors, precisely determining the need for and type of airbag deployment in the event of an impact.
The control unit has an internal memory where important error codes and relevant crash data are stored after an accident. This data is essential for diagnostic purposes and repairs.
To ensure a reliable electrical connection, the airbag communication connectors are often yellow and equipped with gold-plated pins. This guarantees stable signal transmission within the complex safety system.
Why is the Citroën C4 II airbag control unit defective?
A Citroën C4 II airbag control unit often fails because it stores crash data after an accident, requiring a reset, or because internal components fail due to age. This then leads to communication problems, malfunctions, and the illumination of the airbag warning light, necessitating immediate repair.
Common causes of a defect include crash data stored after an accident, which prevents the system from functioning safely. This data must be erased by a specialist workshop before the system can be used again.
Internal electronic components can also wear out over time or be damaged by overvoltage, leading to failures. This often manifests itself in an illuminated airbag warning light in the instrument cluster.
Communication errors with other vehicle systems or connected sensors can also indicate a defect in the control unit. A precise diagnosis is essential in this case.
Common error codes for Citroën C4 II airbag control unit repair
When repairing a Citroën C4 II airbag control unit, error code B1000 is the most common, as it indicates a communication error within the control unit itself. This code indicates a broken or missing connection to the airbag system and requires precise diagnosis to determine the exact cause of the failure.
- B1000 → Control unit communication error → No or interrupted connection to the airbag ECU.
This specific error code indicates that the control unit isn't communicating correctly with the vehicle or that there's an internal malfunction. Other error codes related to sensors or seat belt pretensioners are generally not directly attributable to the control unit itself.
After an accident, the control unit often displays the "Crash data stored" status, but this isn't an error code in the traditional sense. Rather, it's a condition that requires a reset or reprogramming.
What part numbers are available for Citroën C4 II airbag control unit repair?
For the Citroën C4 II airbag control unit, six part numbers are linked to this repair product, among them 285012934, 9673580380, 9675027180 and 9677909280, where 285012934 is a Bosch supplier part number and the other numbers are manufacturer part numbers that belong to airbag control units of this model.
Further linked part numbers are 9678691580 and 9807547380.
The part number is on the label of the control unit and can be stated in the repair order.
4.8
Based on 246 reviews
What our customers say
„Ok.“
Zsolt Szabólast week„Works like a charm!“
Leolylast month„Everything went perfectly, I can only recommend it.“
Automatically translated · Original: German
ka irgendwas2 days ago„From the first phone call, the order processing, to the shipping everything was done very quickly and professionally. Now I still have to send the repaired unit to the Swedish workshop and then hopefully the Honda can fi…“
Automatically translated · Original: German
Gerd Goldammer3 days ago„Airbag control unit Fiat 500 was broken. Hard to believe but they can really repair it! Recommendation!!“
Automatically translated · Original: German
Christian Maegerlein5 days ago„Everything worked out great! Read out fault memory, sent it in, received offer and sent in the defective control unit. Got it back repaired after 3 days, price exactly as in the offer. It can't get any better 👍“
Automatically translated · Original: German
Toni Buien6 days ago„Uncomplicated service. Fast and thorough. Can only recommend.“
Automatically translated · Original: German
Abdul KS6 days ago„All great👍“
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Edin Avdiclast week„All great, fast delivery. Thanks.“
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Andrej Ivanovlast week„100% satisfied. Everything handled very professionally and transparently. Only the return shipping took too long. This was however due to UPS and less to Aairbag24. Thank you very much“
Automatically translated · Original: German
Dennis Welast week„VAG airbag control unit with error B2000 00 reliably repaired. Price very high in comparison, but everything worked out. No exact protocol of what was carried out, probably just newly flashed“
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Tokeh Tokehlast week„A great shop, even when there are sometimes problems. There are quick responses and very good help. I can only recommend the shop. Thank you very much“
Automatically translated · Original: German
Sven Wegenerlast week„Ok.“
Zsolt Szabólast week
