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Smart Fortwo C453 airbag control unit repair
A453 901 89 00 · Label
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Smart Fortwo C453 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.
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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
- Smart
- Model
- Smart Fortwo
- Series
- C453 (2014-2024)
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 Smart Fortwo C453 airbag control unit?
The Smart Fortwo C453 airbag control unit is the central safety unit that activates all occupant restraint systems, such as airbags and seat belt pretensioners, in the event of an accident. It continuously monitors sensors, stores relevant crash data, and ensures the immediate and correct activation of the safety mechanisms for optimal occupant protection.
This module is crucial for the vehicle's passive safety and is used in Smart Fortwo C453 Coupé and Cabriolet models from 2014 to 2019. It is a safety-relevant component that must be inspected immediately in the event of an accident and repaired or replaced if necessary.
The control unit communicates with other vehicle systems via CAN bus (11-bit, 500 kbps) and is powered by the 12V vehicle electrical system. It is typically installed under the center console or in the lower dashboard area of the Smart Fortwo C453.
Why is the Smart Fortwo C453 airbag control unit defective?
A Smart Fortwo C453 airbag control unit often fails because it stores crash data after an accident, preventing it from being reused, or because internal components fail. This then leads to the activation of the airbag warning light and the deactivation of the entire airbag system, compromising vehicle safety.
After an impact, the control unit stores indelible crash data, preventing the airbags from reactivating. A Smart Fortwo C453 airbag control unit repair or module reset is essential to restore the safety system's full functionality.
Even without an accident, internal electronic faults or communication problems with other vehicle systems can occur. Such failures often manifest themselves as a permanently illuminated airbag warning light in the instrument cluster.
Another cause of a malfunction could be a short circuit in the airbag system's ignition circuit. In these cases, the cause must be precisely diagnosed before a Smart Fortwo C453 airbag control unit repair is performed.
Common error codes for Smart Fortwo C453 airbag control unit repair
During Smart Fortwo C453 airbag control unit repairs, specific error codes occur that indicate problems directly with the control unit. These codes often signal stored crash data, communication problems, or interruptions in the airbag ignition circuit and require targeted diagnostics.
- B1000 → Control unit communication error → The airbag control unit has a fault in the internal or external communication.
- B2F00 → Crash data saved → After an accident, data is stored in the control unit that blocks a reset.
- B1043 → Open circuit in the driver airbag ignition circuit → There is a problem with the wiring or the pyrotechnic igniter of the driver airbag.
These error codes are crucial for precise diagnosis, as they point directly to the airbag control unit itself. Careful analysis helps effectively identify the cause of the problem.
What part numbers are available for the Smart Fortwo C453 airbag control unit repair?
For Smart Fortwo C453 airbag control unit repairs, the OEM part numbers A4539017400 and A4539001702 are primarily relevant, as they are directly verified for the C453 series. These numbers guarantee a precise fit and functional compatibility for your vehicle model.
Part number A4539017400 is a genuine Smart/Daimler OEM control unit listed exclusively for the C453 series. This provides maximum security when selecting a replacement part or for repairs.
Likewise, A4539001702 is an OEM part number that also fits the Smart Forfour 453 and is therefore compatible with the Fortwo C453. Both numbers are reliably verifiable and suitable for your Smart Fortwo C453 airbag control unit.
Part number A4518202285 comes from the previous model, the 451, and should be used with caution, as its 100% fit for the C453 has not been clearly confirmed. If unsure, a detailed inspection is recommended.
4.8
Based on 246 reviews
What our customers say
„Ok.“
Zsolt Szabólast week„Works like a charm!“
Leoly4 weeks ago„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 Goldammer2 days ago„Airbag control unit Fiat 500 was broken. Hard to believe but they can really repair it! Recommendation!!“
Automatically translated · Original: German
Christian Maegerlein4 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 Buien5 days ago„Uncomplicated service. Fast and thorough. Can only recommend.“
Automatically translated · Original: German
Abdul KS5 days ago„All great👍“
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Edin Avdic6 days ago„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“
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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“
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Sven Wegenerlast week„Ok.“
Zsolt Szabólast week
