Audi A8 D5 4N airbag control unit repair

4N0 959 655AE · Label

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Audi A8 D5 4N 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

Choose the service that fits your unit.

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.

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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.

B1000
Control unit defective – needs to be repaired
No communication Control unit defective
Control unit defective – needs to be repaired
9451537 Trigger 1 for pedestrian protection B1038 11 (137) - short to ground
Control unit defective – needs to be repaired

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 A8
Series: D5 4N (2017-2021)D5 4N Facelift (2021-XXXX)

Audi A8 D5 4NPhoto: Vauxford · CC BY-SA 4.0 · cropped

Audi A8 D5 4N Facelift — Audi A8 D5 4NPhoto: Vauxford · CC BY-SA 4.0 · cropped

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

4.8

Based on 270 reviewsView all reviews →

Top

Top!

Ok.

Thanks to the team! Very fast processing, flawless shipping, control unit works perfectly again and was above all much cheaper than a new unit.

Automatically translated · Original: German

Top advice on the phone, my control unit/Fiat 500 arrived there on a Wednesday, Friday came the message: Defect found and successfully fixed, by Monday I already had it in the mail. The airbag light came on, the workshop's diagnostic device could not establish any communication. Assumption: airbag control unit defective. On the phone I was told that this is a known defect with the Fiat 500, so sent it off and immediately after reinstalling the problem was solved. I would give 10 stars if I could. Many thanks. Price-wise absolutely fair ; unthinkable that you'd have to pay well over 1000 Euro for a new part with new coding etc.

Automatically translated · Original: German

Serious company, fast and efficient work. Airbag message problem solved following their intervention on my calculator. Thank you.

Automatically translated · Original: French

What is an Audi A8 D5 4N airbag control unit?

The Audi A8 D5 4N 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.

This key component is responsible for precise crash detection and the targeted deployment of airbags and seatbelt pretensioners. It communicates with other vehicle systems via CAN bus to ensure maximum occupant safety.

After an accident, the control unit stores relevant crash data that is essential for diagnosis and possible Audi A8 D5 4N airbag control unit repair.

Why is the Audi A8 D5 4N airbag control unit defective?

An Audi A8 D5 4N airbag control unit often fails because it stores crash data after an accident that needs to be erased, or because internal electronic components fail. Communication errors within the vehicle system or corrosion can also lead to failure, necessitating an Audi A8 D5 4N airbag control unit repair.

The control unit can be damaged by overvoltage or moisture, which impairs its function and leads to error messages.

Sometimes it's not actually broken, but just needs to be reset to clear the crash data and restore full functionality.

Error codes like B1000 indicate communication problems, while 00588 specifically affects the driver airbag deployment circuit and may indicate internal problems.

Common error codes for Audi A8 D5 4N airbag control unit repair

During Audi A8 D5 4N airbag control unit repairs, specific error codes will occur that indicate problems within the system and allow for a precise diagnosis. These codes often signal internal control unit defects, communication problems, or issues with the airbag ignition circuits that need to be addressed.

B1000: Communication error in the airbag control unit – Often an indication of connection problems in the CAN bus or a defective ECU.
00588: Resistance of driver airbag igniter (N95) too high/too low – This classic error indicates internal problems with the control unit, broken wires or bad connectors.
9451537: Pedestrian Protection Trigger 1 - Short to Ground - A specific fault code in the Audi A8 D5 4N airbag control unit indicating a short circuit in the pedestrian protection trigger.

Many of these error codes require special diagnostic tools from VAG or Bosch ESI[tronic] to read and delete.

Crash data stored after an accident blocks the function of the system and can only be removed by a professional Audi A8 D5 4N airbag control unit repair or a reset.

What part numbers are available for the Audi A8 D5 4N airbag control unit repair?

For the Audi A8 D5 4N, this repair product has the three manufacturer part numbers 4N0 959 655AE, 4N0959655A and 4N0959655AC stored. They belong to airbag control units of this model. To see whether your unit belongs, check the part number on the label of the airbag control unit.

The part number from the label can be stated on the repair order.

Guide

How to create a repair order

4.8

Based on 270 reviews

What our customers say

„Top“

Konstantin Wuckert2 days ago

„Top!“

mirko leistner2 weeks ago

„Ok.“

Zsolt Szabó3 weeks ago

„Thanks to the team! Very fast processing, flawless shipping, control unit works perfectly again and was above all much cheaper than a new unit.“

Automatically translated · Original: German

Fritz Ringyesterday

„Top advice on the phone, my control unit/Fiat 500 arrived there on a Wednesday, Friday came the message: Defect found and successfully fixed, by Monday I already had it in the mail. The airbag light came on, the workshop…“

Automatically translated · Original: German

Jessica Gerdesyesterday

„Serious company, fast and efficient work. Airbag message problem solved following their intervention on my calculator. Thank you.“

Automatically translated · Original: French

Gerald Di Nota2 days ago

„An all-round first-class service! The handling with error code U0151 was as simple as can be, the repair was super fast and the return shipping went without delay. After the professional installation by my colleague, all…“

Automatically translated · Original: German

Erkoc Emir2 days ago

„Airbag control unit had the common internal fault and the warning light was permanently on Super fast repair and return delivery everything works again Definitely a cost-effective alternative Can only recommend it“

Automatically translated · Original: German