Recalls › United Kingdom › DAIMLER BUSES GMBH TOURISMO, SETRA S531DT, CITARO

DAIMLER BUSES GMBH TOURISMO, SETRA S531DT, CITARO — recall

Automotive · United Kingdom · 2026-03-31

Daimler Buses TOURISMO/SETRA/CITARO NOx sensor signal not regularly checked

Country	United Kingdom
Category	Automotive
Published	2026-03-31
Manufacturer	DAIMLER BUSES GMBH
Models affected	TOURISMO, SETRA S531DT, CITARO
Units affected	832
Defect	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.
Recall number	R/2026/056
Official notice	View source ↗

What this means for sellers

Likely platform / channel actions	OEMs/dealers will run the remedy (repair, replace or refund); component suppliers in the chain may face traceback.
Self-check for comparable products	Check your comparable products' design, materials and QC records against the defect described here.
Rules & standards likely involved	the destination market's product-safety rules and mandatory standards

🚨 Delisted or named by a regulator? Leave your details and situation — we'll assess and get back to you. Contact us →

General guidance only — not compliance or legal advice; the official notice and applicable law prevail.

Get overseas recalls that matter to you (China-origin highlighted) + top hazards — one email a week. Free, unsubscribe anytime.

By subscribing you agree to our Privacy Policy & Terms (incl. cross-border data processing).