Serviceettersynet begynner nå.

Because Norwegian normally writes compound nouns as a single word.
Here, serviceettersynet is made up of:

• service
• ettersyn = inspection / check
• -et = the definite ending for a neuter noun

So instead of writing separate words, Norwegian combines them into one compound noun.

The ending -et makes the noun definite: the.

The base noun is et ettersyn = an inspection / a check.
The definite form is ettersynet = the inspection / the check.

Since serviceettersynet is a compound built on ettersyn, the whole word takes that definite ending:

• et serviceettersyn = a service inspection
• serviceettersynet = the service inspection

In Norwegian, the definite article is usually attached to the end of the noun instead of being a separate word before it.

So English:

• the service inspection

becomes Norwegian:

• serviceettersynet

This is very common in Norwegian:

• en bil = a car

• bilen = the car

• et hus = a house
• huset = the house

Begynner is the present tense of å begynne = to begin.

So:

• å begynne = to begin
• begynner = begins / is beginning

In this sentence, serviceettersynet is the subject, so begynner is the correct finite verb:

• Serviceettersynet begynner nå. = The service inspection begins now.

Norwegian present tense often ends in -r.

Nå means now, and putting it at the end is very natural in Norwegian.

So:

• Serviceettersynet begynner nå.

is a normal way to say The service inspection begins now.

You can sometimes move nå for emphasis, but the original version is straightforward and idiomatic.

Yes. It follows the basic pattern:

• subject + verb + time word

So here:

• Serviceettersynet = subject
• begynner = verb
• nå = time adverb

This is a very standard sentence structure in Norwegian main clauses.

Yes. Norwegian very often builds new nouns by combining words into compounds.

That means if you already know parts of the word, you can often guess the meaning:

• service = service
• ettersyn = inspection / check

Together, serviceettersyn means something like service inspection, maintenance check, or service check, depending on context.

This kind of word-building is extremely common in Norwegian.

A rough guide for English speakers is:

• be-GYN-ner

A few helpful points:

• gy does not sound like English guy
• the y sound in Norwegian is a rounded vowel that English does not really have
• the g is a hard g

You do not need perfect pronunciation right away, but it helps to notice that Norwegian y is a special vowel.

Often, yes. Starter can also mean starts/begins.

So:

• Serviceettersynet begynner nå.
• Serviceettersynet starter nå.

Both can work in many contexts.

However, begynner is the more general verb to begin, while starter can sometimes sound a little more like starts off or gets underway. In this sentence, begynner is completely natural.

This sentence is standard Bokmål.

In particular, begynner is the Bokmål present-tense form. A Nynorsk version would likely look different, for example with byrjar instead of begynner.

So if you are learning the most widely used written standard in Norway, this sentence fits that system well.