Das Fahrzeug ist neu.

Because Fahrzeug is a neuter noun in German. Its grammatical gender is das.

German nouns belong to one of three genders:

• der = masculine
• die = feminine
• das = neuter

So in the nominative singular, you say:

• das Fahrzeug

You usually have to learn a noun together with its article, because gender is not always predictable.

Fahrzeug is a general word meaning vehicle.

It can refer to things like:

• a car
• a truck
• a motorcycle
• other means of transport

It is broader and more formal/general than Auto, which specifically means car.

So:

• Das Auto ist neu. = The car is new.
• Das Fahrzeug ist neu. = The vehicle is new.

German main clauses normally follow the verb-second rule, often called V2.

In Das Fahrzeug ist neu:

1. Das Fahrzeug = subject
2. ist = verb
3. neu = complement/adjective

So the conjugated verb ist comes in the second position, which is normal German sentence structure.

Ist is the third person singular form of the verb sein (to be).

The subject das Fahrzeug is singular, so German uses:

• ich bin
• du bist
• er/sie/es ist

Since das Fahrzeug is grammatically es-type, the correct form is ist.

Because neu here is used after the verb sein, not directly before the noun.

Compare:

• Das Fahrzeug ist neu.
  Here neu is a predicate adjective, so it has no ending.

• Das neue Fahrzeug
  Here neu comes before the noun, so it is an attributive adjective and it does take an ending.

This is a very important difference in German:

• after sein, werden, bleiben → usually no adjective ending
• before a noun → adjective ending required

Because all German nouns are capitalized.

So:

• das Fahrzeug
• das Haus
• die Stadt

This is one of the easiest visual clues in German: if a word is capitalized in the middle of a sentence, it is often a noun.

A simple English-friendly approximation is:

dahs FAR-tsoykh ist noy

A few pronunciation notes:

• das sounds like dahs
• Fahr sounds roughly like far
• zeug sounds like tsoykh
• neu rhymes roughly with English boy only partly; it is more like noy

More detailed points:

• z in German is pronounced ts
• eu is pronounced like oy
• r in standard German is often softer or more back in the throat than in English

Not if you mean simply new.

• neu = new
• neuartig = novel, innovative, of a new kind

So:

• Das Fahrzeug ist neu. = The vehicle is new.
• Das Fahrzeug ist neuartig. = The vehicle is innovative/of a new type.

These are related but not the same.

Yes. You can say:

• Es ist neu.

That means It is new.

This works when the context already makes clear what it refers to. If you are introducing the thing for the first time, Das Fahrzeug ist neu is clearer.

Yes. Das Fahrzeug ist neu is in the present tense.

It literally means The vehicle is new.

German uses the present tense very often, sometimes even where English might prefer a different form depending on context. But in this sentence, the simple present is the natural translation.

It is in the nominative case because it is the subject of the sentence.

In this sentence:

• das Fahrzeug = subject
• ist = verb
• neu = predicate adjective

So the noun phrase stays in the nominative:

• das Fahrzeug

No. That is not correct.

In German, adjectives used after sein do not need an article.

Correct:

• Das Fahrzeug ist neu.

Not correct:

• Das Fahrzeug ist ein neu.

You would only use an article if you were using a noun:

• Das Fahrzeug ist ein Neuwagen. = The vehicle is a new car.

The plural is die Fahrzeuge.

So:

• singular: das Fahrzeug
• plural: die Fahrzeuge

Examples:

• Das Fahrzeug ist neu. = The vehicle is new.
• Die Fahrzeuge sind neu. = The vehicles are new.

Notice that the verb also changes:

• ist for singular
• sind for plural