Tuan, kad gantian ini baru.

Tuan is a polite form of address, similar to sir in English.

At the beginning of the sentence, it is being used to address the listener directly, not as part of the grammar of the main statement. So the structure is basically:

Tuan, + main sentence

This is common in formal or service situations.

The comma shows that Tuan is a direct address.

In English, this is similar to:

Sir, this replacement card is new.

The comma separates the person being addressed from the statement itself.

Malay often does not need a verb like is/am/are in simple sentences.

So:

kad gantian ini baru

can naturally mean:

this replacement card is new

Malay frequently allows a noun phrase followed directly by an adjective or description, without adding a separate copula verb.

In Malay, demonstratives such as ini (this) and itu (that) usually come after the noun phrase they describe.

So:

• kad ini = this card
• kad gantian ini = this replacement card

This is the normal Malay word order, even though it is the opposite of English.

Kad means card.

Gantian means replacement or substitute, from the root ganti.

So kad gantian is a noun phrase meaning replacement card.

You can think of it as a fixed compound-like phrase:

• kad = card
• gantian = replacement
• kad gantian = replacement card

Here, baru is the predicate adjective, meaning new.

The sentence is structured like this:

kad gantian ini = this replacement card
baru = new

So the whole sentence means:

This replacement card is new.

English speakers may expect new to come before the noun, but here it is not part of the noun phrase. It is the main description of the subject.

Not normally.

As written, kad gantian ini baru is understood as:

This replacement card is new.

If you want new to directly modify the noun, you would usually structure it differently, for example:

• kad gantian baru ini
• kad gantian yang baru ini

Those mean something closer to this new replacement card.

So the position of baru matters.

No. Baru is a very common word with more than one use.

It can mean:

1. new
2. just / only just / recently

For example:

• Saya baru sampai. = I just arrived.

But in kad gantian ini baru, the natural reading is new, because it is describing the card.

Yes, but in everyday usage the difference is often not very strict.

• baharu is the more formal or standard word for new
• baru is very commonly used in speech and writing, and can also mean just/recently

So in very formal Malay, some people might prefer baharu for clarity:

• Tuan, kad gantian ini baharu.

But baru is extremely common and natural.

It sounds polite and somewhat formal, especially because of Tuan.

You might hear it in places like:

• a bank
• a government office
• customer service
• a hotel reception desk

Without Tuan, the sentence becomes more neutral:

• Kad gantian ini baru.

With Tuan, it sounds more respectful and directed to the listener.

Yes, but it changes the structure and may slightly change the emphasis.

Ini kad gantian baru means something like: This is a new replacement card.

That sentence starts with ini as this is...

But Kad gantian ini baru means: This replacement card is new.

So both are possible, but they are not structured in exactly the same way.