Гарантійний ремонт зроблять безкоштовно.

Зроблять is the 3rd person plural future form of зробити.

Literally, it means they will do/make. But in sentences like this, Ukrainian often uses they with an unspecified human subject. So the sentence does not mean that some specific group called they is important. It means something like:

• They will do the warranty repair for free
• or more naturally in English, The warranty repair will be done for free

The implied people are the workers, technicians, or service center staff.

In Ukrainian, зробити ремонт is a very common expression. It literally looks like do/make a repair, but it is a normal way to say carry out a repair.

So:

• зробити ремонт = to do/carry out a repair
• ремонтувати = to repair
• відремонтувати = to repair/fix completely

All of these can work in different contexts, but зробити ремонт is very natural and common.

Here ремонт is the direct object of зроблять.

The verb pattern is:

• зробити що? — ремонт

So the noun is in the accusative case. But for many masculine inanimate nouns in Ukrainian, the accusative singular looks exactly the same as the nominative singular.

That is why you see:

• nominative: ремонт
• accusative: ремонт

So the form does change by case grammatically, but the ending happens to stay the same.

Гарантійний is an adjective modifying ремонт.

It agrees with ремонт in:

• gender: masculine
• number: singular
• case: accusative singular

Since ремонт is masculine singular and inanimate, the adjective form гарантійний looks the same as the nominative form.

So:

• гарантійний ремонт = warranty repair / repair under warranty

This is a standard phrase in Ukrainian.

Because безкоштовно is an adverb, and it describes how the action is done:

• зроблять як? — безкоштовно
• will do it how? — free of charge

If you used безкоштовний, that would be an adjective and would need to describe a noun, for example:

• безкоштовний ремонт = a free repair

So both ideas are possible, but this sentence is built with an adverb:

• Гарантійний ремонт зроблять безкоштовно = The warranty repair will be done free of charge

Not grammatically, no. It is an active sentence with an unspecified plural subject.

Ukrainian often prefers this structure where English might use the passive.

So instead of saying a formal passive like:

• Гарантійний ремонт буде зроблено безкоштовно

everyday Ukrainian can simply say:

• Гарантійний ремонт зроблять безкоштовно

Both are possible, but the version with зроблять sounds more natural and conversational in many situations.

This is about aspect.

• зробити is perfective
• робити is imperfective

The form зроблять is a simple future perfective form, and it emphasizes that the repair will be completed.

So:

• зроблять = will do / will get done as a completed action
• будуть робити = will be doing / will do with more focus on process, duration, or repeated action

In this sentence, the completed result is what matters, so зроблять is the natural choice.

Yes. Ukrainian word order is flexible, and changing it changes the emphasis more than the basic meaning.

For example:

• Гарантійний ремонт зроблять безкоштовно — neutral
• Безкоштовно зроблять гарантійний ремонт — emphasizes free of charge
• Гарантійний ремонт безкоштовно зроблять — also gives extra focus to безкоштовно

The original order is very natural and straightforward.

Because Ukrainian has no articles.

English needs:

• a warranty repair
• the warranty repair

Ukrainian simply says:

• гарантійний ремонт

Whether it means a or the depends on context. In a real conversation, the listener understands from the situation whether this is a specific repair or just the general idea of warranty repair.

A useful stress pattern is:

• гаранті́йний ремо́нт зро́блять безкошто́вно

Approximate pronunciation:

• ha-ran-TIY-nyy re-MONT ZROB-lyat bez-kosh-TOV-no

A few helpful notes:

• г in Ukrainian is usually like a soft h sound, not a hard English g
• зроблять has the stress on the first syllable: зро́блять
• безкоштовно has stress on то́в

Yes, and the meaning would be similar.

For example:

• Гарантійно відремонтують is not correct in the same way, because гарантійно usually means guaranteed/certainly, not under warranty
• Відремонтують безкоштовно = They will repair it for free
• Гарантійний ремонт виконають безкоштовно = more formal
• Гарантійний ремонт зроблять безкоштовно = natural and common

So the original sentence is a very normal way to express the idea.