Daimler Buses Tourismo: Mdeg/hdep Euro VI Standard Nox Sensor Monitoring Inoperative
Recall Summary Daimler Buses is recalling 832 vehicles (Tourismo, Setra S531DT, and Citaro models) because their nitrogen oxide (NOx) emissions sensors are not being properly monitored as required by EU emissions standards. The vehicles have a software error that prevents the monitoring system from functioning correctly. The fix requires updated software to be installed in the engine and exhaust treatment control units.
- Recalling firm
- DAIMLER BUSES GMBH
- Product
- Vehicles: DAIMLER BUSES TOURISMO, DAIMLER BUSES SETRA S531DT, DAIMLER BUSES CITARO. Units affected: 832
- Reason
- 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 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. Remedy: To remedy this an update software version in engine management (MCM) and exhaust gas aftertreatment (ACM) control units is required.
- Category
- vehicle recall
- Country
- United Kingdom
- Agency
- UK Driver and Vehicle Standards Agency
- Recall date
- 2026-03-31
- Status
- Ongoing
- Distribution
- United Kingdom
Official recall notice from UK Driver and Vehicle Standards Agency
Recall details on Nibble Recalls: https://trynibble.app/recalls/8750d7d1-c805-4f51-813b-1e22d71d9867