A gépjármű a parkolási övezetben van.

Because Hungarian uses the definite article a/az much like English the.

• A gépjármű = the vehicle
• a parkolási övezetben = in the parking zone

So the sentence has two definite noun phrases, and each one gets its own article.

Use a before a consonant sound and az before a vowel sound:

• a ház = the house
• az autó = the car

Not exactly. Gépjármű is a more formal and broader word than autó.

It means something like:

• vehicle
• motor vehicle

So it can refer to a car, but also more generally to a motor-powered road vehicle. In everyday speech, Hungarian speakers often say autó if they specifically mean car. Gépjármű sounds more official, legal, or administrative.

Parkolási is an adjective-like form meaning related to parking.

It comes from the verb parkol = to park.
The ending -ási / -ési can turn a verb into a noun or modifier connected with the action.

So:

• parkol = to park
• parkolási = parking / related to parking

In parkolási övezet, it describes the type of zone:

• övezet = zone
• parkolási övezet = parking zone

This is a fairly formal expression.

Because Hungarian usually expresses in by adding a case ending to the noun instead of using a separate preposition.

Here the ending is -ban / -ben, which means in.

• övezet = zone
• övezetben = in the zone

So:

• a parkolási övezetben = in the parking zone

This is one of the biggest differences from English: Hungarian often uses suffixes where English uses separate words like in, on, to, from, etc.

Because of vowel harmony, which is a basic rule in Hungarian.

Hungarian suffixes often have different forms depending on the vowels in the word.
For -ban / -ben:

• -ban usually goes with back-vowel words
• -ben usually goes with front-vowel words

Övezet contains front vowels (ö, e, e), so it takes -ben:

• övezetben

Compare:

• házban = in the house
• kertben = in the garden

Because in Hungarian, when you have an adjective + noun phrase, the case ending normally goes on the main noun, not on the adjective.

So:

• parkolási övezet = parking zone
• parkolási övezetben = in the parking zone

The adjective parkolási stays unchanged, and the noun övezet carries the ending.

This is normal Hungarian structure.

That is a very common and very good question.

Hungarian often does omit van (is) in the present tense, but only in certain sentence types, especially when the predicate is a noun or adjective:

• Az autó piros. = The car is red.
• Péter tanár. = Péter is a teacher.

But with location, Hungarian normally uses van:

• Az autó a garázsban van. = The car is in the garage.
• A gépjármű a parkolási övezetben van. = The vehicle is in the parking zone.

So here van is needed because the sentence says where something is.

Hungarian word order is more flexible than English, but different orders change the emphasis.

The neutral order here is:

• A gépjármű a parkolási övezetben van.

This simply states the fact.

But you could also say:

• A parkolási övezetben van a gépjármű.

This puts more focus on the location, roughly like:

• It is in the parking zone that the vehicle is.
• or more naturally, The vehicle is in the parking zone. with emphasis on in the parking zone.

So yes, the words can move, but the information structure changes.

It is grammatical and natural, but it sounds somewhat formal or official.

That is mostly because of:

• gépjármű instead of the more everyday autó
• parkolási övezet as a fairly administrative expression

In everyday speech, someone might say something simpler, like:

• Az autó a parkolózónában van.
• Az autó a parkolási zónában van.

But the original sentence is perfectly fine, especially in signs, regulations, or official contexts.

A rough guide:

• gépjármű ≈ gayp-yaar-myoo
• övezetben ≈ uh-veh-zet-ben, but with a rounded ö sound

A few important points:

• é is a long vowel, roughly like ay in say, but pure and steady
• á is a long open vowel
• ű is a long ü sound, which English does not really have; it is similar to German ü
• ö is also not a normal English sound; it is similar to German ö

Also, Hungarian stress is usually on the first syllable of each word:

• GÉPjármű
• Övezetben
• PARkolási

It means the vehicle, because a here is the definite article.

So:

• a gépjármű = the vehicle
• egy gépjármű = a vehicle

Compare:

• A gépjármű a parkolási övezetben van. = The vehicle is in the parking zone.
• Egy gépjármű a parkolási övezetben van. = A vehicle is in the parking zone.

So if you want the indefinite meaning, you would normally use egy.