James T.Manchester · Google
Posted my BMW airbag module on Monday and had it back Wednesday. Clear emails the whole way and the airbag light went straight out.
Specialists in crash data & module repair
B0100-49
Airbag fault.
Internal SRS error on Ducato, Relay, and Boxer motorhomes. What the code means, when a reset helps, and how postal clear works.
B0100-49 explained in plain English
If a scan tool shows B0100-49 on a Fiat Ducato, Peugeot Boxer, or Citroën Relay based motorhome or van, you are looking at an internal airbag / SRS module fault. It is common enough that owners and converters recognise the number, and common enough that dealers often jump straight to a replacement ECU quote.
The code does not automatically mean the circuit board is dead. In many cases the fault is held in the module in a way a specialist reset can clear, so your original ECU goes back in without dealer coding on a brand-new unit. That is the job we do at Universal Square, Devonshire St N, Manchester M12 6JH.
Why B0100-49 appears, and when a reset helps
On Ducato-family chassis the airbag control module can log B0100-49 as an internal error. Owners notice it after electrical work, battery events, or sometimes with no obvious trigger. The light stays on, MOT fails, and the conversion or hire season is stuck until the restraint system is happy again.
A reset helps when the module hardware is sound and the fault is clearable. It will not help if a sensor, squib, connector, or loom is still failing on the vehicle. That is why we ask for a label photo and any scan notes before you post. If the odds look poor, we say so.
- Fiat Ducato based motorhomes and vans
- Peugeot Boxer based motorhomes and vans
- Citroën Relay based motorhomes and vans
- Conversions built on those chassis with the same SRS module family
Always confirm from the ECU label. Two vans can share a chassis name and still use different modules. Broader motorhome context: motorhome airbag light.
How a B0100-49 postal reset works
Your garage keeps the motorhome. Only the airbag module posts to Manchester. We clear the fault, test the unit, and return it ready to fit. Fixed public price for this fault is published on our pricing menu below. Full service overview: motorhome airbag reset.
What you do
- Remove the module and photograph the full part-number sticker
- Order the motorhome B0100-49 reset
- Post the module to Universal Square, Devonshire St N, Manchester M12 6JH with the order number inside
- Refit when it returns. Choose tracked return at checkout if you need a trail
Three steps
How it works
Order online, post the module, plug it back in. Read the full process.
Pick your module
Search the part number stamped on the ECU, or send a photo of the label. Not sure? WhatsApp us and we will help you find the right module.
Checkout and post
Pay by card, bank transfer, or call us. Pack the module securely and send it with your order details inside.
We reset and return
We clear the crash data, test the unit, and send it back ready to fit. Most morning arrivals go out the same day.
What to put in the parcel
- The airbag module / ECU only
- Your order number written inside
- A clear photo of the label kept on your phone
- Strong packaging (insured outbound postage if you want it)
Our guides
Short reads to help you find the right module and know what happens next.
How to find your airbag module part number
Where to look on the ECU label, what the codes mean, and how to order the right reset first time.
Read GuideWhat happens during a crash data reset
A plain-English look at what we clear, how we test the unit, and when it is ready to fit again.
Read Guide
Airbag light on after a crash
Why the light stays on, when a postal reset is the right next step, and what to check before you send it.
Read GuideWhat our customers say
Real feedback from drivers and garages who send modules to us every week.
Sarah K.Leeds · Trustpilot
WhatsApped a photo of the label and they found the right module for me. Fair price, insured postage, and the crash data reset sorted it.
Dave R.Birmingham · Google
We send customer airbag modules from the garage every week. Same-day turnaround when it arrives in the morning. Proper reliable.
Amelia P.Bristol · Trustpilot
Airbag light stayed on after a minor shunt. Ordered the postal reset online, packed it up, and plugged it back in when it came home. Job done.
Chris W.Glasgow · Google
Needed a Ford airbag ECU cleared and was worried about buying the wrong reset. They checked the part number and talked me through it. No fuss.
Natalie H.Cardiff · Trustpilot
Motorhome airbag light on a Fiat Ducato. They knew the module straight away. Posted it Friday, back early the next week. Really helpful lot.
Clear fixed pricing
Fixed public prices for the reset. Return shipping is chosen separately at checkout.
Return shipping
When the reset is done, we send your module back the way you choose at checkout. Royal Mail Tracked 24, Tracked 48, or free workshop collect if you are picking it up in Manchester. That return leg is separate from the reset price.
B0100-49 FAQs
What is B0100-49?
B0100-49 is a common airbag / SRS internal error on Fiat Ducato, Peugeot Boxer, and Citroën Relay based motorhomes and vans. It often points to a module-side fault that a specialist reset can clear when the hardware itself is sound.
Does B0100-49 mean I need a new airbag module?
Dealers often quote a new ECU. That is not always necessary. If the module is intact and the fault is held in software / memory, a specialist reset of your existing unit is usually the cheaper, faster route. We will be honest if a photo or notes suggest otherwise.
How much is a B0100-49 reset?
Our fixed public price for motorhome B0100-49 is £65 all-in for the reset service. Other motorhome modules usually follow our £35 or £46 bands. Return shipping is chosen separately at checkout.
Will a B0100-49 reset always work?
When the fault is held in the module, a reset is usually the right fix. If wiring, sensors, or connectors are still failing, the code can return. Send a label photo and any scan notes and we will be honest about the odds before you post.
Do I need the whole motorhome at a dealer?
No. You (or your garage) remove the airbag module and post only that ECU. We reset it in Manchester and return it ready to fit. The motorhome stays where it is.
How quickly can you turn B0100-49 around?
For most modules, if we receive it in the morning, we complete the crash data reset and send it back the same day.
Related: motorhome airbag light, motorhome airbag reset, reset vs replace.