Daimler Buses Setra S531dt: Emergency Valve May Malfunction

Recalling firm

DAIMLER BUSES GMBH

Product

Vehicles: DAIMLER BUSES SETRA S531DT, DAIMLER BUSES TOURISMO, DAIMLER BUSES TOURISMO L, DAIMLER BUSES TOURISMO M/2, DAIMLER BUSES TOURISMO M/3. Units affected: 63

Reason

It has been determined that the external emergency valves may malfunction. The issue is caused by an excessively large bore diameter in a component of the door control valve. Because the diameter lies outside the specified tolerance (0.74 mm instead of the required 0.65 mm) compressed air flows back faster than the system can vent. Consequently the pneumatic self‑holding mechanism does not release and the door can only be opened if the internal emergency valve is actuated first. If the external emergency valve is actuated first the defect may prevent the door from opening. In an emergency...

Classification

Class II

Category

vehicle recall

Country

United Kingdom

Agency

UK Driver and Vehicle Standards Agency

Recall date

2026-06-24

Status

Ongoing

Distribution

United Kingdom

Official recall notice from UK Driver and Vehicle Standards Agency

Recall details on Nibble Recalls: https://trynibble.app/recalls/c4ae44d8-7b57-4f31-a3ec-241e0936a411