După inspecția tehnică periodică, șoferul cumpără un triunghi reflectorizant.

După usually means after. Here it introduces a time expression: După inspecția tehnică periodică = After the periodic technical inspection.

Romanian often uses după the same way English uses after:

• după masă = after lunch
• după școală = after school

So in this sentence, it tells you when the driver buys the item.

Because inspecția is the definite form, meaning the inspection.

In Romanian, the definite article is usually attached to the end of the noun instead of being a separate word like the in English.

• inspecție = an inspection
• inspecția = the inspection

So:

• inspecția tehnică periodică = the periodic technical inspection

In Romanian, adjectives often come after the noun, much more often than in English.

So:

• inspecția tehnică periodică literally follows the order inspection technical periodic
• natural English: the periodic technical inspection

This noun + adjective order is very common in Romanian:

• mașină nouă = new car
• carte interesantă = interesting book

They must agree with the noun inspecția, which is feminine singular.

Romanian adjectives agree with the noun in:

• gender
• number
• sometimes definiteness/case in certain contexts

Here:

• inspecție is feminine singular
• so the adjectives are also feminine singular:
  • tehnic → tehnică
  • periodic → periodică

Yes, very much. It is a standard Romanian expression for the vehicle’s required technical inspection, often shortened in Romania to ITP.

So learners should recognize:

• inspecția tehnică periodică
• abbreviation: ITP

In real life, Romanians often say things like:

• Mașina are ITP-ul valabil. = The car has a valid technical inspection.
• Trebuie să fac ITP-ul. = I have to do/get the technical inspection.

For the same reason as inspecția: it is definite.

• șofer = a driver
• șoferul = the driver

The ending -ul is the masculine singular definite article.

So:

• șoferul cumpără = the driver buys

Cumpără is the present tense, 3rd person singular, from the verb a cumpăra = to buy.

Forms:

• eu cumpăr = I buy
• tu cumperi = you buy
• el/ea cumpără = he/she buys

In this sentence:

• șoferul cumpără = the driver buys

Depending on context, the Romanian present can describe:

• something happening now
• a habitual action
• a general statement
• sometimes even a near-future idea

But here the basic reading is simply the driver buys.

Because un is the masculine singular indefinite article, meaning a.

• triunghi = triangle
• un triunghi = a triangle

So:

• un triunghi reflectorizant = a reflective triangle

It is indefinite because this is being introduced as a new item, not a specific already-known one.

Because reflectorizant agrees with triunghi, which is masculine singular.

Compare:

• triunghi reflectorizant = reflective triangle
• vestă reflectorizantă = reflective vest

The adjective changes form to match the noun:

• masculine singular: reflectorizant
• feminine singular: reflectorizantă

Yes, it is a normal and understandable way to say it, especially in road-safety contexts.

A few related terms you may also encounter are:

• triunghi reflectorizant = reflective triangle
• triunghi de presemnalizare = warning triangle / advance warning triangle

In everyday context, triunghi reflectorizant works well and clearly refers to the safety triangle used in a car.

The comma separates the introductory time phrase from the main clause:

• După inspecția tehnică periodică, = After the periodic technical inspection,
• șoferul cumpără un triunghi reflectorizant. = the driver buys a reflective triangle.

This is similar to English punctuation, where a fronted time expression is often followed by a comma.

Yes. Romanian word order is fairly flexible, though some versions sound more natural depending on what you want to emphasize.

For example:

• Șoferul cumpără un triunghi reflectorizant după inspecția tehnică periodică.
• După inspecția tehnică periodică, șoferul cumpără un triunghi reflectorizant.

Both are correct. The version in your sentence emphasizes the time context first: after the inspection.

With ordinary nouns like the one here, you mainly just learn the phrase as it appears: după inspecția...

Romanian does not work exactly like languages where prepositions always trigger very visible case endings on nouns. In many everyday noun phrases, the form after după looks like the normal noun phrase form.

However, with pronouns you can sometimes notice special forms:

• după mine = after me / according to me
• după el = after him

So for a learner, the important thing here is simply:

• după + noun phrase = after + noun phrase

You would remove the definite article from șoferul:

• Un șofer cumpără un triunghi reflectorizant. = A driver buys a reflective triangle.

Compare:

• șofer = driver
• șoferul = the driver

Likewise:

• inspecție = an inspection
• inspecția = the inspection

A helpful breakdown is:

• După inspecția tehnică periodică = prepositional phrase of time

  • main noun: inspecția
  • adjectives: tehnică, periodică

• șoferul = subject

  • main noun: șoferul

• cumpără = verb

• un triunghi reflectorizant = direct object

  • main noun: triunghi
  • adjective: reflectorizant

So the sentence structure is basically:

After [the periodic technical inspection], [the driver] buys [a reflective triangle].