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Audi S4 B8 8K airbag control unit repair
8K0 959 655 B · Label
- Label
- Connector
- Back
- 8K0 959 655 B
- 8K0 959 655 N
Audi S4 B8 8K 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
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Repair type
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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
- Audi
- Model
- Audi S4
- Series
- B8 8K (2008-2011)B8 8K (2011-2015)

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.
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4.8What is an Audi S4 B8 8K airbag control unit?
The Audi S4 B8 8K airbag control unit is your vehicle's central safety unit, instantly activating all occupant restraint systems, such as airbags and seatbelt pretensioners, in the event of an accident. It continuously monitors sensors, stores relevant crash data, and ensures the proper functioning of all airbag modules in the vehicle for your maximum safety.
This control unit is essential for the passive safety of the Audi S4 B8 8K and is a crucial component of occupant protection.
It processes signals from various crash sensors located at key points on the vehicle to enable a quick response.
Why is the Audi S4 B8 8K airbag control unit defective?
A defective Audi S4 B8 8K airbag control unit often occurs after an accident, due to aging of the internal electronics, or due to moisture damage that impairs its functionality. This causes the system to activate the warning light and the proper deployment of the airbags in an emergency can no longer be guaranteed, requiring urgent repair.
After a collision, the control unit stores crash data that may require a reset or repair.
Age-related wear and tear of internal components or errors in communication via the vehicle data bus are also common causes of failure.
In addition, the ingress of moisture or short circuits can lead to irreversible damage to the control unit, which makes an immediate Audi S4 B8 8K airbag control unit repair necessary.
Common error codes for Audi S4 B8 8K airbag control unit repair
During an Audi S4 B8 8K airbag control unit repair, specific error codes will occur that directly indicate problems with the control unit or its communication. These codes are crucial for a precise diagnosis to identify the exact cause of the malfunction and restore the safety of the airbag system.
- B1000 → Control unit communication error → This code indicates a faulty or missing connection between the airbag control unit and the vehicle system.
- 00588 → Driver airbag squib (N95) resistance too high or too low → The airbag control unit detects a deviation in the resistance circuit of the driver airbag squib.
- 01217 → Driver's Side Airbag Ignition (N199) Error → This error indicates a malfunction or circuit defect in the driver's side airbag ignition system.
- B102229 → Airbag control unit specific error (communication / status) → An internal defect or a general communication problem of the control unit is displayed here.
Reading these error codes with a suitable diagnostic tool is the first step in identifying the cause of a defect in the Audi S4 B8 8K airbag control unit.
Please note that only codes that directly refer to the control unit itself or its communication channels are relevant.
What part numbers are available for the Audi S4 B8 8K airbag control unit repair?
For the Audi S4 B8 8K airbag control unit repair, five Audi manufacturer part numbers are listed for this repair product, including 8K0 959 655, 8K0 959 655 B, 8K0 959 655 J and 8K0 959 655 N. They belong to airbag control units of this model.
The further listed number is the Audi manufacturer part number 8K0 959 655 P.
The part number is printed on the label of the airbag control unit and can be entered in the repair order.
Compatibility and installation of the Audi S4 B8 8K airbag control unit
The Audi S4 B8 8K airbag control unit is specifically designed for models of the B8 platform from approximately 2007 to 2015, including the S4 and A4. It must be properly installed in the center console to ensure a secure and functional connection to all airbag components and the vehicle data bus.
This control unit is compatible with the Audi S4 B8 8K (model year approx. 2009-2012) and the facelift (B8.5).
It also fits comparable Audi A4 B8 models from 2007 to 2015, which underlines its versatile application.
The installation location is typically below the dashboard in the center console, protected under the carpet or a cover.
Installation and repair of the Audi S4 B8 8K airbag control unit requires special tools and expertise, especially when connecting the yellow-marked safety connectors.
Repair or replacement – What to do if the Audi S4 B8 8K airbag control unit is defective?
When an Audi S4 B8 8K airbag control unit is defective, you often have to choose between repair and replacement, although repair can be a cost-effective and environmentally friendly alternative. A professional diagnosis by a specialist workshop is crucial to finding the optimal solution for restoring vehicle safety.
It is often possible to repair the control unit, especially if there are software errors, crash data or minor electronic defects.
Specialized workshops can repair internal components and professionally erase crash data, extending the lifespan of the part.
The successful Audi S4 B8 8K airbag control unit repair restores the system to its original condition and avoids unnecessary costs for new parts.
In cases of irreversible hardware damage or when repair is uneconomical, replacing the control unit with a suitable original or OEM spare part is the best option.
Correct coding of the new component after replacement is essential to ensure the full functionality and safety of the airbag system.
Based on 246 reviews
What our customers say
„Ok.“
„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 fi…“
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
„Uncomplicated service. Fast and thorough. Can only recommend.“
Automatically translated · Original: German
„All great👍“
Automatically translated · Original: German
„All great, fast delivery. Thanks.“
Automatically translated · Original: German
„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
„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“
Automatically translated · Original: German
„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
„Ok.“




