Je me demande si la garantie couvre encore cette télécommande.

Because se demander is the usual French way to say to wonder or to ask oneself.

• Je me demande si... = I wonder if / whether...
• Je demande si... would usually sound incomplete or unnatural here, because demander by itself means to ask someone for something or to ask a question.

So the reflexive pronoun me is part of the verb expression se demander.

Examples:

• Je me demande s’il va venir. = I wonder if he’s going to come.
• Je demande une explication. = I’m asking for an explanation.

Yes, and here it still does — but specifically in the sense of whether in an indirect yes/no question.

In French, si is used after verbs like:

• se demander = to wonder
• savoir = to know
• dire = to say
• voir = to see

when the idea is whether / if.

So:

• Je me demande si la garantie couvre encore cette télécommande. = I wonder whether the warranty still covers this remote control.

Important: this is not the same si as the one used in conditional sentences like If it rains... although the word is the same.

Because this is an indirect question, not a direct question.

Direct question:

• Est-ce que la garantie couvre encore cette télécommande ?
• La garantie couvre-t-elle encore cette télécommande ?

Indirect question:

• Je me demande si la garantie couvre encore cette télécommande.

After si, French uses normal statement word order:

• si + subject + verb
• si la garantie couvre...

You do not use est-ce que or inversion inside this kind of subordinate clause.

La garantie usually means the warranty or the guarantee, depending on context.

In this sentence, the most natural English meaning is the warranty:

• la garantie couvre encore cette télécommande = the warranty still covers this remote control

French often uses garantie where English would naturally prefer warranty, especially for products and repairs.

Yes. Couvrir literally means to cover, but it is also used in the extended sense of to be covered by a warranty / insurance / policy.

So:

• La garantie couvre cet appareil. = The warranty covers this device.
• L’assurance couvre les dégâts. = The insurance covers the damage.

This is very similar to English, where cover also has that figurative meaning.

Yes, absolutely.

These two ideas are very close:

• La garantie couvre encore cette télécommande.
• Cette télécommande est encore couverte par la garantie.

Both mean roughly the same thing:

• The warranty still covers this remote control.
• This remote control is still covered by the warranty.

The difference is mainly focus:

• La garantie couvre... focuses on the warranty.
• Cette télécommande est couverte... focuses on the remote.

In French, short adverbs like encore, déjà, souvent, toujours often come after the conjugated verb.

So:

• la garantie couvre encore cette télécommande

Literally:

• the warranty covers still this remote control

But in natural English, we say:

• the warranty still covers this remote control

So the position of encore is normal in French.

Here it means still.

Encore can mean both:

• again
• still / yet

The context tells you which one is meant.

In this sentence, still makes sense:

• I wonder if the warranty still covers this remote control.

If you interpreted it as again, the sentence would sound odd:

• I wonder if the warranty covers this remote again

So context clearly points to still.

Because télécommande is a feminine singular noun.

French demonstrative adjectives agree with the noun:

• ce = masculine singular before most consonants
• cet = masculine singular before a vowel or mute h
• cette = feminine singular
• ces = plural

So:

• ce téléphone = this phone
• cet ordinateur = this computer
• cette télécommande = this remote control
• ces appareils = these devices

Yes, une télécommande is feminine.

You usually learn noun gender together with the article:

• une télécommande
• la télécommande

There is no foolproof way to guess every noun’s gender, so it is best to memorize the noun with its article.

Because couvrir takes a direct object in this meaning.

So French says:

• La garantie couvre cette télécommande.

Not:

• couvre de cette télécommande
• couvre sur cette télécommande

This is just how the verb works: the thing being covered comes directly after the verb.

Because French uses the present tense here just as English does.

• Je me demande... = I wonder...
• la garantie couvre encore... = the warranty still covers...

The sentence is talking about a current situation: whether the warranty is still valid for this item now.

French does not need a special tense here.

Yes, that is another very natural way to express a similar idea.

• Cette télécommande est encore sous garantie. = This remote control is still under warranty.

So:

• Je me demande si cette télécommande est encore sous garantie. = I wonder if this remote control is still under warranty.

This version is slightly less focused on what the warranty covers and more focused on the product’s status.

Télécommande means remote control in general, not only a TV remote.

Depending on context, it could be for:

• a television
• a garage door
• an air conditioner
• another electronic device

In this sentence, English might naturally say remote, but remote control is the full meaning.

Yes. In French, articles are used more often than in English.

So French naturally says:

• la garantie = the warranty
• cette télécommande = this remote control

You cannot usually drop the article before garantie here. French prefers a determiner before nouns much more consistently than English does.