Se verifică stopul și centura de siguranță.

Not in the literal reflexive sense. It does not mean checks itself.

Here, se verifică is a very common Romanian impersonal / passive-like construction. It can be understood as:

• one checks
• is checked / are checked

So the sentence means something like:

• The brake light and the seat belt are checked
• One checks the brake light and the seat belt

This kind of se + verb structure is especially common in instructions, procedures, manuals, and checklists.

Because Romanian often leaves the agent unspecified in this structure.

In English, instructions often do something similar:

• Check the brake light and the seat belt
• The brake light and the seat belt are checked

Romanian uses se verifică to avoid naming who does it. The focus is on the action itself, not on the person performing it.

In Romanian, stopul usually refers to a rear light / brake light on a vehicle.

So here it does not mean:

• the command stop
• a stop sign

In car-related Romanian, stop is a common everyday word. Depending on context, it can mean the brake light or the rear light assembly more generally, but in a sentence like this it is usually understood as the brake light.

Because Romanian usually puts the definite article at the end of the noun.

So:

• stop = a brake light / brake light
• stopul = the brake light

and

• centură = a belt
• centura = the belt

This is one of the big differences from English. Instead of putting a separate word like the before the noun, Romanian often attaches it as a suffix.

In this sentence, both nouns are definite because we are talking about the specific items being checked.

Centura de siguranță means seat belt or safety belt.

Literally, it is something like:

• centura = the belt
• de siguranță = for safety / of safety

Romanian very often uses noun + de + noun to express ideas that English might express with:

• another noun
• an adjective
• a compound noun

So centură de siguranță is just the normal Romanian way to say seat belt / safety belt.

Also, only centura is definite here. Siguranță is not definite, because it is part of the phrase de siguranță.

For many Romanian verbs in the present tense, the 3rd person singular and 3rd person plural have the same form.

With a verifica:

• el/ea verifică = he/she checks
• ei/ele verifică = they check

So verifică by itself does not tell you whether it is singular or plural.

In this sentence, the meaning comes from the whole structure:

• se verifică = impersonal/passive-like
• stopul și centura de siguranță = the things being checked

So you understand it from context, not from the verb ending alone.

Because that word order is very natural in Romanian instructions and procedural language.

Se verifică stopul și centura de siguranță sounds like a checklist item or inspection step:

• first the action
• then the items concerned

You could also say:

• Stopul și centura de siguranță se verifică

but that sounds more like you are emphasizing the items themselves. In manuals, rules, and instructions, the verb-first version is very common.

Yes. That is a more explicit passive sentence and it is grammatically fine.

Compare:

• Se verifică stopul și centura de siguranță.
  • more natural in instructions, checklists, and everyday procedural language
• Stopul și centura de siguranță sunt verificate.
  • more formal, more obviously passive

Both can mean essentially the same thing, but the se version is usually the more idiomatic choice in this kind of context.