An incorrect value may be reported when the data is processed by the vehicle due to faulty software in the electronic engine control unit (ECU). This can cause nitrogen oxide (NOx) emissions to exceed legal limits. Excessive NOx emissions are a risk to the environment.
The Citroen C4 X vehicles affected by this recall were manufactured between 5 July 2022 and 4 October 2023.
Citroen recall code: MQ6
Affected models: C3 Aircross, C4, C4 X, C-Elysée, DS7 Crossback
Vehicle numbers (worldwide): n/a
Source: Rapex Alert 5/2025 SR/00435/25