Citroën C3 Aircross, C4, C4X Recall R/2025/012: Citroen C3 C4 C4X Selective Catalytic Reduction Diagnosis Issues, Who Is Affected And What To Do
- Low
- How serious
- 9 Jan 2025
- Launched
- 418
- vehicles in the UK
- MQ6-241066CO
- Manufacturer’s campaign code
Citroën recalled C3 Aircross, C4, C4X vehicles built between 18 May 2022 and 17 October 2023. The Engine Control Unit (ECU) software is not according to specification. The recall notice describes the fix as: upload modified software to the ECU. You won't usually pay for it.1
What’s Wrong
The Engine Control Unit (ECU) software is not according to specification.
DVSA's Original Wording
Concern: Citroen C3 C4 C4X Selective Catalytic Reduction diagnosis issues. Defect: On affected vehicles the Engine Control Unit (ECU) software is not according to specification. Remedy: Upload modified software to the ECU.
Contains public sector information licensed under the Open Government Licence v3.0.
The Risk
The recall notice describes the concern as: citroen C3 C4 C4X selective catalytic reduction diagnosis issues.
The Fix
The recall notice describes the fix as: upload modified software to the ECU. The fix is a software update, which usually takes under an hour at the dealer.
Are You Affected?
C3 Aircross, C4, C4X built between 18 May 2022 and 17 October 2023 may be included. Citroën estimates 418 vehicles in the UK. Enter your registration to check, then confirm by VIN with Citroën, because not every car in the date range may be included.
Which Car Is It?
Choose the make and model so we can match recalls to your car.
What To Do Now
- Check your car by registration above, then by VIN with Citroën.
- Book with any franchised Citroën dealer, quoting the campaign code MQ6-241066CO or the DVSA reference R/2025/012. See how to get a Citroën recall fixed.
- Follow the letter's instructions until the repair is done. See can you drive a car with a recall?.
Related Recalls
| Launched | Vehicle and fault | Severity | Reference |
|---|---|---|---|
| C3, C3 AircrossAlarm triggered randomly: BCM software | Low | R/2026/122 | |
| C3, C3 Aircross, C4, C4XAlternator protection | Urgent | R/2026/073 | |
| C3, C3 AircrossCitroen C3 C3 Aircross brake pedal bracket connection | Urgent | R/2025/514 | |
| C3 AircrossCitroen C3 C3 Aircross risk of brake bar welding breakage | Stop driving | R/2025/363 | |
| Berlingo, C3, C3 Aircross, C4 and 5 moreOn board diagnostics | Low | R/2025/346 |
This is one of 414 Citroën recalls in DVSA’s data. The Citroën recall launched before it was R/2025/022 on 10 Dec 2024, for citroen C3 DS3 driver and passenger airbag (Takata). The one launched after it was R/2025/020 on 16 Jan 2025, for citroen Relay traffic sign recognition software via OTA update. You can also see every Citroën recall, the Citroën C4 recall history, all recalls launched in 2025 and software recalls across every make.
Source: DVSA recall R/2025/012, launched 9 January 2025. Data updated 15 October 2026. How we grade urgency.
Sources
- The Code does not itself say repairs are free. GOV.UK guidance says "You will not usually have to pay for any repairs or parts under a safety recall." gov.uk Checked 15 Oct 2026.