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DAIMLER BUSES GMBH TOURISMO, SETRA S531DT, CITARO — recall

Automotive · United Kingdom · 2026-03-31

DAIMLER BUSES GMBH TOURISMO, SETRA S531DT, CITARO was recalled in United Kingdom on 2026-03-31. The EU directive for commercial vehicles with the Euro 6 emissions standard stipulates that the NOx sensor signal is regularly checked for plausibility. The IUPR monitor (In Use Performance Ratio) was defined for this purpose. At a minimum 50% of vehicles in …

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CountryUnited Kingdom
CategoryAutomotive
Published2026-03-31
ManufacturerDAIMLER BUSES GMBH
Models affectedTOURISMO, SETRA S531DT, CITARO
Units affected832
DefectThe EU directive for commercial vehicles with the Euro 6 emissions standard stipulates that the NOx sensor signal is regularly checked for plausibility. The IUPR monitor (In Use Performance Ratio) was defined for this purpose. At a minimum 50% of vehicles in a class must have this monitor be active at least 10% of the possible time. This is not the case for the affected vehicles. Cause Parameter error in data record creation.
RemedyTo remedy this an update software version in engine management (MCM) and exhaust gas aftertreatment (ACM) control units is required.
Recall numberR/2026/056
Official noticeView source ↗

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