When is a vehicle immediately taken out of circulation?

Vehicles may be used only in a safe operating condition and in conformity with the regulations (Art. 29 SVG). If the authority — at the official inspection or a roadside check — finds serious defects that directly endanger safety, it can immediately prohibit further driving.

In such cases the registration document and licence plates are seized; the vehicle may be put back into circulation only after the defects are remedied and a follow-up inspection is passed. For less serious defects, a deadline for remedy is set instead (objection).

The threshold for an immediate prohibition is the direct endangerment of road safety — not every defect leads to it.