Átvizsgáljuk a féklámpát, a fényszórót és az irányjelzőt.

Because Hungarian is using the definite conjugation here.

The verb is átvizsgál = inspect / examine thoroughly.
Its we form can be:

• átvizsgálunk = we inspect something indefinite / unspecified
• átvizsgáljuk = we inspect a definite object

In this sentence, the things being inspected are specific and definite:

• a féklámpát = the brake light
• a fényszórót = the headlight
• az irányjelzőt = the turn signal

Because the object is definite, Hungarian uses átvizsgáljuk, not átvizsgálunk.

The prefix át- often gives the sense of through, over, or thoroughly.

So:

• vizsgáljuk = we examine / inspect
• átvizsgáljuk = we check over / inspect thoroughly

In many contexts, átvizsgál sounds more like a careful, systematic inspection than plain vizsgál.

That -t is the accusative ending, which marks the direct object in Hungarian.

In English, word order usually tells you what the object is. In Hungarian, the object is often marked by a suffix.

Here:

• féklámpa → féklámpát
• fényszóró → fényszórót
• irányjelző → irányjelzőt

So these words mean:

• the brake light as the thing being inspected
• the headlight as the thing being inspected
• the turn signal as the thing being inspected

The basic accusative marker is -t, but sometimes a linking vowel appears before it, as in féklámpát.

Hungarian has two forms of the definite article:

• a
• az

Which one is used depends on the following sound:

• a before a consonant sound
• az before a vowel sound

So:

• a féklámpát — féklámpa starts with f
• a fényszórót — fényszóró starts with f
• az irányjelzőt — irányjelző starts with i

It works a bit like English a / an.

Hungarian often repeats the article in lists, especially when each item is felt as a separate definite object.

So this is very natural:

• a féklámpát, a fényszórót és az irányjelzőt

Repeating the article can make the list clearer and more structured. English sometimes does the same, but Hungarian does it more comfortably and naturally.

You may also see lists where not every article is repeated, but in this sentence the repeated articles sound completely normal.

Hungarian word order is more flexible than English word order. It is not fixed in the same way.

Starting with the verb here gives a fairly neutral procedural or checklist-like feel, something like:

• We inspect/check the brake light, the headlight, and the turn signal.

This is especially natural in instructions, demonstrations, or descriptions of a process.

A different word order is also possible, for example:

• A féklámpát, a fényszórót és az irányjelzőt átvizsgáljuk.

That version puts more attention on the objects themselves.

Formally, it is present tense.

However, Hungarian present tense can also refer to the future when the context makes that clear, especially in:

• instructions
• plans
• step-by-step descriptions

So depending on context, Átvizsgáljuk... could mean:

• We inspect...
• We are going to inspect...
• Next, we inspect...

Hungarian often does not need a separate future form where English might use will or going to.

A few sounds here are especially important for English speakers:

• á = a longer, more open vowel than a
• é = like a long ay sound
• ó / ő = long vowels; ő is a rounded front vowel, which English does not really have
• sz = pronounced like English s
• s = pronounced like English sh
• zs = like the s in measure
• ny = like the ny in canyon
• gy = a soft sound somewhat like British d in duke, but not exactly

Some examples from the sentence:

• fényszóró: note that sz is just s
• irányjelző: ny is a single sound
• vizsgáljuk: zs is the voiced zh sound

Hungarian spelling is very regular, so once you learn the sound values, pronunciation becomes much easier.

Yes, all three nouns are compounds, which is very common in Hungarian:

• fék + lámpa → féklámpa = brake light
• fény + szóró → fényszóró = headlight
  literally something like light-thrower / light-projector
• irány + jelző → irányjelző = turn signal / direction indicator

This matters because Hungarian often builds technical vocabulary through compounds. Once you get used to that, many words become easier to remember and decode.

Yes, és simply means and here.

There is nothing especially unusual about it in this sentence. It just links the final item in the list:

• a féklámpát, a fényszórót és az irányjelzőt

Hungarian punctuation and list structure here are very similar to English.

Yes, that would sound wrong in standard Hungarian.

Because the sentence has a definite object, you need the definite verb form:

• correct: Átvizsgáljuk a féklámpát...
• not correct here: Átvizsgálunk a féklámpát...

A native English speaker often has to get used to the fact that in Hungarian, the verb form changes depending on whether the object is definite or indefinite. That is one of the key grammar points in this sentence.