Works like a charm!
Volvo S40 M airbag control unit repair
Volvo S40 M 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(233)
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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
- Volvo
- Model
- Volvo S40
- Series
- M (2004-2007)M Facelift (2007-2012)
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 233 reviewsView all reviews →
Airbag control unit Fiat 500 was broken. Hard to believe but they can really repair it! Recommendation!!
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 airbag light). Thanks to Airbag 24 in Berlin 👍👏. Gerd
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Fast repair and fast shipping Simply top
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Everything works great
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Ultra fast delivery, fit really well in the end. There was even a pen and gummy bears included. :D Definitely again, thank you very much!
Automatically translated · Original: German
What is a Volvo S40 M airbag control unit?
The airbag control unit is the central unit of the restraint system (SRS) in the Volvo S40 M. It monitors the system continuously and reports faults via the airbag warning light. In an accident it decides within milliseconds whether to deploy airbags and seatbelt pretensioners, and then stores crash data, after which it locks itself.
The readings from the crash sensors come together in the control unit and are evaluated there, so that the right firing commands go out without delay in an emergency. The control unit is fitted in the Volvo S40 M (2004 to 2012); it comes from Continental.
In everyday use it is noticed mainly through the airbag warning light in the instrument cluster. If the light does not go out after the engine is started, the self-monitoring has detected a problem, and the restraint system may no longer be fully ready for use.
Why is the Volvo S40 M airbag control unit defective?
If the airbag warning light in the Volvo S40 M stays on permanently, the most common cause is crash data that was stored in the airbag control unit after an accident, even if no airbag was deployed. An ordinary diagnostic tool cannot remove it. Other causes are aged components, cold solder joints, moisture and corrosion, and voltage spikes.
The first thing you notice is the light that no longer goes out. If you clear the fault memory and the entry returns immediately, stored crash data is a likely reason. This also applies after an accident in which no airbag was deployed.
If your diagnostic tool cannot connect to the control unit at all, the electronics themselves may be affected. Components age, solder joints crack over the years, and at connectors moisture and corrosion attack the contacts. Voltage spikes, for example with a weak battery or when jump-starting, put additional strain on the circuit.
A similar warning can occasionally also be caused by faults in the data bus or in the power supply. Which cause applies is revealed by a look at the fault memory.
Common error codes for Volvo S40 M airbag control unit repair
The codes for the Volvo S40 M point to internal faults of the control unit, communication faults on the data bus, a supply voltage that is too low and faults in the firing circuit.
Depending on the fault, a different entry is stored in the memory. This selection shows what occurs on this model:
- SRS-CFFF → Internal fault in the control unit
- SRS-0001 → Internal functional fault in the control unit
- SRS-00D0 → Faulty data in the control unit
- SRS-00D5 → Communication fault with the control unit
- U0151-00 → No communication with the control unit on the data bus
- U0452-41 → Invalid data received from the control unit
- SRS-0005 → Supply voltage too low
- SRS-0115 → Driver airbag firing circuit open or short circuit
Error codes are read out with a diagnostic tool. A code alone cannot reliably tell you that the control unit is defective. The cause can just as well be an airbag module, a connector or a wire. Only an inspection provides clarity.
What part numbers are available for the Volvo S40 M airbag control unit repair?
On the label of your Volvo S40 M airbag control unit you will find the part number, which defines the exact version. Depending on equipment and year of manufacture, different numbers occur within the model series.
We know of the following numbers. This list is not complete.
- P30724427
- P30724652
- P30773354
- P30773401
- P31295109
- P31334738
- 30773401 (Continental)
- 31334738
Hold the number on your unit next to this list. This only tells you whether it is the matching unit. Whether it is defective only becomes clear from reading out the fault memory or from the inspection at our workshop.
This is how you get to the repair: First have the fault memory read out. Then disconnect the battery, remove the control unit, create a repair order online and send the unit in. At Airbag24, processing with inspection, repair and testing usually takes 3–4 working days. Your own unit is sent back to you.
The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.
4.8
Based on 233 reviews
What our customers say
„Works like a charm!“
Leoly3 weeks ago„Airbag control unit Fiat 500 was broken. Hard to believe but they can really repair it! Recommendation!!“
Automatically translated · Original: German
Christian Maegerleinlast 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 f…“
Automatically translated · Original: German
Gerd Goldammerlast week„Fast repair and fast shipping Simply top“
Automatically translated · Original: German
Andreas Foxlast week„Everything works great“
Automatically translated · Original: German
Wolfgang Katenzlast week„Ultra fast delivery, fit really well in the end. There was even a pen and gummy bears included. :D Definitely again, thank you very much!“
Automatically translated · Original: German
Tim Hammer2 weeks ago„I drive a W210 estate. My control unit was broken and because of that I couldn't go to TÜV. I was recommended Airbag24 from a forum. I sent in my control unit. Unfortunately everything was a bit under time pressure and I…“
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Franz Dampf2 weeks ago„Motorhome Fiat Ducato. Fault airbag lamp lit permanently, could also not be reset after reading it out. Fault was permanently present. Quick friendly contact with Airbag24, described the fault, known problem was the stat…“
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Rene Larisch2 weeks ago„Professionals are at work here, any additional repairs that may arise are carried out without complaint and without discussion...always happy to come back.“
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Manfred Gunia3 weeks ago„From the order to the repair everything worked well, airbag control unit installed, the light goes off again as it should, good service, fast repair and return shipping. Thanks 👍👍👍“
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Petra3 weeks ago„Got the second airbag control unit from you for another car. Fits, no more error message. Great service Can only recommend. Super fast delivery, and they keep what they promise. A big thank you to this company.“
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Mama 43 weeks ago„Super fast service and repair Fast processing“
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Dennis Baron4 weeks ago„Works like a charm!“
Leoly3 weeks ago
