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Seat Leon 3 [5F] airbag control unit repair
3Q0 959 655 AC · Label
- Label
- Connector
- Back
- 3Q0 959 655 AC
- 3Q0 959 655 AS
- 3Q0 959 655 BH
- 3Q0 959 655 CM
Seat Leon 3 [5F] 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(254)
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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
- Seat
- Model
- Seat Leon
- Series
- 3 [5F] (2012-2020)
![Seat Leon 3 [5F]](https://icokoivvbcsshqyveujm.supabase.co/storage/v1/object/public/product-images/fit_01KV3F4F36F5S9XCG51SBMF6EQ-800-01M07XWYWX63RGWJR2RGFTTF89.webp)
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 254 reviewsView all reviews →
Ok.
Works like a charm!
The website of Airbag24 Airbagsysteme is very well structured and simply explained. I sent my airbag control unit from my Renault Trafic there for repair. I am very satisfied with the telephone contact as well as by mail and the consultation. Keep the system as it is, the price/performance ratio as well as the service is great. Super fast shipping. Can only recommend the company. 5+ stars*
Automatically translated · Original: German
Super great! Very fast repair of an airbag control unit of a Fiat Bravo 198. Sent it off on Monday, got it back already repaired by Friday and installed it. Everything works perfectly again. Old reliable car saved again for only 280,00 Euro! Thanks to Airbag24!
Automatically translated · Original: German
Well structured website with clear instructions, processing on schedule, punctual delivery. Worked immediately after reinstallation.
Automatically translated · Original: German
What is a Seat Leon 3 [5F] (Type 5F) airbag control unit?
The Seat Leon 3 [5F] (Type 5F) airbag control unit is the central safety unit that activates all occupant restraint systems, such as airbags and seatbelt pretensioners, 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 specific control unit was developed for the Seat Leon 3 [5F] (Type 5F) and is a key component of the passive safety system, often relevant in the context of Seat Leon 3 [5F] airbag control unit repair.
It receives and processes data from crash sensors and other safety-relevant systems in the vehicle in order to respond precisely in an emergency.
Why is the Seat Leon 3 [5F] (Type 5F) airbag control unit defective?
The Seat Leon 3 [5F] airbag control unit is often defective because it stores crash data after an accident, which blocks the system and causes a persistent warning message. Internal errors such as software problems, EEPROM defects, or malfunctions in internal communication can also lead to failure.
A common reason for a defective Seat Leon 3 [5F] airbag control unit is stored crash data after an accident, which makes it impossible to reset the system.
Internal electronic faults or software problems, such as those indicated by error code B2000, can also cause failure; in such cases, a professional Seat Leon 3 [5F] airbag control unit repair is necessary.
Voltage fluctuations, short circuits or moisture can also damage the sensitive electronics of the control unit and cause a failure.
Common error codes for Seat Leon 3 [5F] airbag control unit repair
During a Seat Leon 3 [5F] airbag control unit repair, internal error codes often occur, indicating a malfunction of the control unit itself. These VAG-typical B-codes are crucial for a precise diagnosis and targeted resolution of the airbag control unit issue.
- B1000 → Control unit communication error → Error in the internal data transmission of the airbag control unit.
- B1001 → Internal memory error in the airbag control unit → Damage to the internal memory (EEPROM/Flash) in the control unit.
- B1010 → Voltage supply / power supply airbag control unit → Problems with the power supply or internal voltage regulation of the ECU.
- B1015 → Internal software error in the airbag control unit → Faulty or corrupt software in the airbag control unit.
- B1020 → Airbag control unit watchdog reset → The control unit has restarted itself due to an internal malfunction.
- B1030 → EEPROM error in the airbag control unit → Defect in the non-volatile memory in which critical vehicle information and crash data are stored.
- B1040 → Faulty internal diagnostic function (self-test) → The control unit cannot perform its own self-test correctly.
- B1050 → Internal bus communication error (CAN communication) → Malfunction of the internal communication via the CAN bus within the airbag control unit.
- B1060 → Airbag control unit initialization error → The control unit could not be initialized correctly at startup.
- B1070 → Firmware incompatibility / Software version not valid → Invalid or incompatible software version was detected.
- B1080 → Internal temperature error in the airbag control unit → Overheating or sensor error of the internal temperature monitoring.
- B1090 → Internal sensor validation error (control unit) → The control unit cannot correctly validate internal sensor values.
What part numbers are available for the Seat Leon 3 [5F] airbag control unit repair?
For the Seat Leon 3 [5F] airbag control unit repair, the OEM part numbers 3Q0 959 655 AC and 3Q0 959 655 AS are primarily relevant, as these are confirmed as original and replacement parts for the specific model. An exact match of the part number is crucial for compatibility.
Two primary, 100% verified OEM part numbers have been identified for the Seat Leon 3 [5F] (Type 5F) airbag control unit.
The number 3Q0 959 655 AC is the original VW/Seat part number, which is confirmed as suitable in specialized services, while 3Q0 959 655 AS is considered an alternative or spare part number for the same control unit.
If a Seat Leon 3 [5F] airbag control unit repair is necessary, one of these numbers must match, as other part numbers from older generations (Mk1, Mk2) are not compatible.
Guide
How to create a repair order
4.8
Based on 254 reviews
What our customers say
„Top!“
mirko leistnerlast week„Ok.“
Zsolt Szabó2 weeks ago„Works like a charm!“
Leolylast month„The website of Airbag24 Airbagsysteme is very well structured and simply explained. I sent my airbag control unit from my Renault Trafic there for repair. I am very satisfied with the telephone contact as well as by mail…“
Automatically translated · Original: German
H. S.2 days ago„Super great! Very fast repair of an airbag control unit of a Fiat Bravo 198. Sent it off on Monday, got it back already repaired by Friday and installed it. Everything works perfectly again. Old reliable car saved again…“
Automatically translated · Original: German
Stephan Plewinsky2 days ago„Well structured website with clear instructions, processing on schedule, punctual delivery. Worked immediately after reinstallation.“
Automatically translated · Original: German
Dieter Hirsch3 days ago„Apart from the price which remains a bit high, but compared to the only replacement solution and the service provided, it's PERFECT. Very good sending and return procedure, and customer contact SUPER, not to mention the…“
Automatically translated · Original: French
patrick taverna4 days ago„Very satisfied great work“
Automatically translated · Original: German
Florian Bickel4 days ago„Airbag control unit was defective..Sent it in and got it back faster than expected.Worked great.Great performance from the Airbag24 Team.Thanks and I will recommend you further.“
Automatically translated · Original: German
Dieter Winkler5 days ago„I can only recommend this company. My airbag control unit was repaired within a short time and sent back to me. Airbag system works perfectly again.“
Automatically translated · Original: German
Andreas Koennlast week„Everything went perfectly, I can only recommend it.“
Automatically translated · Original: German
ka irgendwaslast week„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 Goldammerlast week„Top!“
mirko leistnerlast week
