إما أن يكون العيب في المكابح أو في الإطارات.

إما ... أو ... means either ... or ....

So:

• إما أن يكون العيب في المكابح أو في الإطارات
• = Either the problem is in the brakes or in the tires

A useful thing to notice is that Arabic often uses this pair as a set:

• إما = either
• أو = or

This is a very common structure for presenting two alternatives.

Here أن introduces the clause يكون العيب...

So the structure is:

• إما أن يكون ... أو ...
• Either it is the case that ... or ...

In smoother English, we usually do not translate أن separately. It is just part of the Arabic grammar that helps introduce the verbal clause.

With كان / يكون, أن is very common in this kind of construction.

Arabic could express location or description with a noun sentence in many contexts, but here يكون adds the sense of be/is in a more explicit way.

• يكون = be / is
• أن يكون العيب في المكابح = that the defect/problem is in the brakes

This sounds natural after إما أن. The full pattern إما أن يكون ... أو ... is a standard formal way to say either ... or ...

The verb agrees with العيب, which is grammatically masculine singular.

• العيب = the defect / the fault / the problem
• masculine singular
• so the verb is يكون

If the subject were a feminine singular noun, you would expect تكون instead.

For example:

• إما أن تكون المشكلة في المكابح أو في الإطارات
• Either the problem is in the brakes or in the tires

Here المشكلة is feminine, so تكون is used.

العيب literally means the defect, the fault, or the flaw.

In this sentence, it is best understood as:

• the problem
• the fault
• the issue

So العيب في المكابح means something like:

• the problem is in the brakes
• the fault lies in the brakes

It is a common word when talking about malfunction, blame, or where something is wrong.

Because each option is being stated fully:

• في المكابح = in the brakes
• في الإطارات = in the tires

So the sentence literally says:

• Either the defect is in the brakes or in the tires

Arabic often repeats the preposition for clarity, especially in formal style. English can do the same:

• in the brakes or in the tires

You might sometimes see omission in other contexts, but repeating في here is completely natural and clear.

Yes, في literally means in, but in sentences like this it often has the broader meaning of:

• in
• with
• lies in
• is located in

So:

• العيب في المكابح
• literally: the defect is in the brakes
• more naturally: the problem lies in the brakes

This is a very common way in Arabic to identify where a problem is.

المكابح is plural.

Its singular is commonly:

• مِكْبَح = brake

So:

• المكابح = the brakes

In real usage, when talking about a car, Arabic often uses the plural just like English does.

Yes, الإطارات is plural.

Its singular is:

• إطار = tire / frame / rim, depending on context

In this sentence, because the topic is vehicle trouble, الإطارات means the tires.

So:

• الإطارات = the tires

Context is what tells you that this is about tires rather than some other kind of frame.

After أن, the verb is in the subjunctive.

For the verb كان / يكون, the subjunctive form is:

• يكونَ

In fully vowelled Arabic, you would write:

• إما أن يكونَ العيبُ في المكابحِ أو في الإطاراتِ

In normal unvowelled writing, this appears simply as:

• يكون

So learners should know that the subjunctive is there grammatically, even though it usually is not visible in everyday Arabic script.

The order is:

• أن = that / introducing the clause
• يكون = be
• العيب = the defect/problem
• في المكابح = in the brakes

So literally:

• that be the-problem in the-brakes

More natural English:

• that the problem is in the brakes

This is a common Arabic pattern with كان and its forms: the verb comes before the noun that functions as the subject.

Yes, definitely.

A very natural alternative is:

• إما أن تكون المشكلة في المكابح أو في الإطارات

This means essentially the same thing:

• Either the problem is in the brakes or in the tires

The main difference is tone and word choice:

• العيب = the defect / fault
• المشكلة = the problem

المشكلة is often broader and very common in everyday language, while العيب can sound a bit more like fault or defect.

A careful pronunciation would be approximately:

• immā ʾan yakūna al-ʿaybu fī al-makābiḥi ʾaw fī al-iṭārāti

A few pronunciation notes:

• إما = immā
• أن = ʾan
• يكون = yakūn(a)
• العيب contains ع, a sound that does not exist in English
• المكابح ends with ح, a strong breathy h
• الإطارات has a long ā sound in the middle

If you are reading unvowelled text, this is the kind of sentence where knowing the grammar helps you supply the correct pronunciation.