O para-brisa e o alinhamento estão no orçamento.

Because the subject is plural: o para-brisa e o alinhamento.

Even though each noun is singular by itself, they are joined by e, so together they form a compound subject. In Portuguese, that normally requires a plural verb.

• O para-brisa está no orçamento. = one item
• O para-brisa e o alinhamento estão no orçamento. = two items

So estão agrees with the two things mentioned.

No is a contraction of em + o.

So:

• em = in / on / at
• o = the
• no = in the / on the / at the

This kind of contraction is very common and usually required in Portuguese:

• em + o = no
• em + a = na
• em + os = nos
• em + as = nas

So no orçamento is simply in the estimate / in the budget / on the quote, depending on context.

Because Portuguese very often repeats the definite article before each noun when listing separate specific things.

So o para-brisa e o alinhamento sounds natural because the speaker is referring to:

• the windshield
• the alignment

English is sometimes looser about article repetition, but Portuguese often prefers o X e o Y when both items are definite and separate.

Estar is the natural choice here because the idea is being included / being present in an estimate or quote.

Estar no orçamento is a common way to say that something is part of the estimate.

• está/estão no orçamento = is/are in the estimate
• está/estão incluído(s) no orçamento = is/are included in the estimate

Using ser here would sound unnatural, because this is not about identity or essential characteristics. It is about something’s presence in a specific document or proposal.

Nothing is missing. Estão no orçamento is already complete and natural.

Portuguese often leaves incluído(s) unstated when the meaning is obvious from context. In a repair-shop or service context, saying something is in the estimate naturally means it is included in the estimate.

So both are possible:

• O para-brisa e o alinhamento estão no orçamento.
• O para-brisa e o alinhamento estão incluídos no orçamento.

The second version is a little more explicit, but the first is perfectly normal.

Because para-brisa is a compound noun, and the gender of a compound does not always follow the gender of one of its parts.

Many Portuguese compounds of the verb + noun type are masculine:

• o guarda-chuva
• o para-raios
• o para-brisa

So even though brisa by itself is feminine, the compound is treated as masculine: o para-brisa.

It is a compound noun, and you should learn it as a single vocabulary item.

In practice, it simply means windshield. The form you were given is hyphenated, and it behaves like a masculine noun:

• singular: o para-brisa
• plural: os para-brisas

For a learner, the most useful thing is to recognize it as one unit, not to try to translate each piece literally every time.

In this kind of context, orçamento often means estimate or quote, not just budget in the general financial sense.

In Brazil, if you are talking to a mechanic, repair shop, dentist, contractor, or similar service provider, orçamento is very commonly the price estimate they give you.

So in a sentence like this, the most natural interpretation is usually:

• the windshield and the alignment are included in the quote/estimate

Yes, very often.

In an automotive context, alinhamento commonly means wheel alignment or alignment service. Portuguese often leaves the fuller phrase understood from context.

So a mechanic can simply say o alinhamento, and listeners will understand it as the car-related service.

Outside that context, alinhamento can also mean alignment in a broader sense, such as physical, visual, organizational, or even political alignment.

Because Portuguese uses definite articles more often than English does, especially when talking about specific, known things.

Here, the sentence refers to specific items in a specific quote:

• o para-brisa = the windshield
• o alinhamento = the alignment
• o orçamento inside no orçamento = the estimate/quote

That sounds very normal in Portuguese. English sometimes feels lighter with articles, but Portuguese often prefers to make specificity explicit.