Citroën Relay Airbag ECU Crash Data Reset – Mail-In UK
Citroën Relay Airbag ECU Crash Data Reset – Nationwide Mail-In Service
After a collision, your Citroën Relay's SRS airbag module locks itself in a permanent fault state and stores crash data that no standard diagnostic tool can clear — The Vehicle Check resets that data by mail-in from anywhere in the UK, with a 3–5 working day turnaround and free return shipping.
| Detail | Information |
|---|---|
| Service | Citroën Relay airbag SRS module crash data reset |
| What's included | Crash data clear, hard fault removal, bench test, free return shipping |
| Turnaround | 3–5 working days from receipt |
| Warranty | 12 months |
| How to send | Remove module, pack securely, post tracked to Office 13, 25 Mollison Avenue, Enfield, EN3 7NJ |
| Service area | UK-wide mail-in (international enquiries welcome) |
| Contact | 0203 489 2610 or thevehiclecheck.co.uk/collections/crash-data |
What does crash data in a Citroën Relay airbag module actually mean?
The Relay's SRS control module monitors seatbelt pre-tensioners, side-impact sensors and the airbag circuits continuously. The moment a collision exceeds the deployment threshold — even if the airbags physically fire or even if they don't — the module writes a permanent crash-event record to its memory and raises a hard fault. That fault will not clear with a generic code reader, with an ignition cycle, or by disconnecting the battery. The module is designed to stay locked until a specialist intervenes, so the airbag warning light remains on and the entire SRS system is disabled until the data is properly reset.
This is different from a standard diagnostic fault code. Codes like B0001 (frontal crash detected) or B0051 (crash output active) are written into crash-data memory — a separate, protected area of the module — and need specialist equipment and software to clear safely. TVC works on Relay airbag modules from the X244 and X250 platform generations and assesses each unit on arrival before any work begins.
Browse TVC's full range of SRS airbag crash data reset services to see the complete vehicle list.
Why does mail-in beat going to a Citroën dealer for this?
| Factor | TVC Mail-In | Citroën Dealer |
|---|---|---|
| Typical approach | Reset and return your original module | Often replace the module at new-part cost |
| Need to visit? | No — post from anywhere in the UK | Yes — vehicle usually required in-bay |
| Turnaround | 3–5 working days | Variable; often longer if parts ordered |
| Return postage cost | Free | N/A |
| Warranty on work | 12 months | Varies |
Dealers frequently quote for a new airbag module on the assumption the existing one is unrecoverable. In the vast majority of post-accident cases on the Relay, the original module is perfectly intact — it simply has locked crash data. Resetting it is significantly more cost-effective than sourcing and coding a replacement, and you get your own unit back, which means no additional VIN programming at the dealer.
How do you safely remove the airbag module from a Citroën Relay and post it in?
Safety first: disconnect the negative battery terminal and leave the vehicle for a minimum of 20 minutes before you go near any SRS components. This allows the capacitors in the airbag system to discharge fully.
On most Relay variants the SRS control module sits beneath the centre console or under the driver's seat. Once you have located it:
- Unplug each wiring connector — squeeze the tab and pull firmly, don't yank the wires.
- Remove the two or four mounting bolts (typically 8mm or 10mm).
- Lift the module clear and check the part number on the label — keep a note of it for TVC's reference.
- Wrap the unit in at least two layers of bubble wrap and place it in a rigid cardboard box with generous padding around all faces.
- Use a tracked and signed-for courier service. Keep the tracking reference until your module is back with you.
- Include a note with your name, return address and contact number so TVC can reach you if needed.
Post to: Office 13, 25 Mollison Avenue, Enfield, EN3 7NJ. TVC will email or call you on receipt and confirm the assessment before any work starts.
What gives TVC the expertise to do this correctly?
The Vehicle Check is a UK automotive electronics specialist with hands-on experience across a wide spread of European and Asian vehicle platforms. The workshop handles SRS modules, mechatronics, ECUs and body control units from manufacturers including PSA Group (Citroën, Peugeot), Mercedes-Benz, Volkswagen Group, BMW, Ford, Honda and others — giving the team a depth of real-world knowledge that a general garage simply cannot match. Every airbag module is bench-tested after the crash data reset to confirm the unit responds correctly before it goes back in the post.
TVC also offers BSI cloning services for PSA Group vehicles, DSG and Mercedes mechatronic repair, and clutch actuator repair — meaning many Relay operators who've had gearbox or body electronics issues alongside the airbag fault can sort multiple problems in a single mail-in.
Frequently Asked Questions
Ready to send your Citroën Relay airbag module in?
The quickest way to get started is to visit thevehiclecheck.co.uk/collections/crash-data, select the Citroën Relay airbag crash data reset, and follow the booking steps. If you'd prefer to talk it through first — whether you're a Relay owner, a fleet operator or a garage sorting a customer's van — call TVC on 0203 489 2610. The team will confirm the service is right for your unit, give you a return address label if needed, and make sure you know exactly what to expect before you post anything.
Post your module to: Office 13, 25 Mollison Avenue, Enfield, EN3 7NJ — tracked and padded, with your contact details inside the box. TVC does the rest and ships it back to you free.
The Vehicle Check is a UK automotive electronics specialist at Office 13, 25 Mollison Avenue, Enfield, EN3 7NJ, offering nationwide and international mail-in repair and cloning. Call 0203 489 2610. Last updated: 14 November 2026.
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