Lốp xe bị thủng, má phanh bị mòn, xe máy rung.

Here bị marks an unwanted or negative condition happening to something. It often has a passive-like feel in English.

• lốp xe bị thủng = the tire is punctured / has a puncture
• má phanh bị mòn = the brake pad is worn down

So bị helps show that the thing has suffered a problem. It is very common when talking about damage, accidents, defects, or other bad situations.

Because rung already works well as the main verb meaning to vibrate / shake.

• xe máy rung = the motorcycle vibrates

This is describing what the motorcycle does, not necessarily putting it into a passive or affected pattern. By contrast:

• bị thủng = be punctured
• bị mòn = be worn down

So bị is natural with damage-like results, but not necessary with rung.

In Vietnamese, words like thủng, mòn, and rung are often best thought of as verbs or stative verbs rather than adjectives in the English sense.

For example:

• lốp xe thủng literally behaves like the tire punctures / is punctured
• má phanh mòn = the brake pad wears down / is worn
• xe máy rung = the motorcycle vibrates

Vietnamese does not always separate verbs and adjectives the way English does. A quality or condition can often act directly as the predicate without needing a word like is.

Vietnamese often does not use a copula like English is/are when describing a state or condition.

So instead of saying something like The tire is punctured, Vietnamese can simply say:

• Lốp xe bị thủng

Likewise:

• Má phanh bị mòn
• Xe máy rung

This is very normal Vietnamese sentence structure.

Má phanh means brake pad or brake shoe, depending on the braking system. It refers to the part that presses against the wheel or disc to slow the vehicle down.

So:

• má = pad/lining surface
• phanh = brake

Together, má phanh is a specific brake component, not the whole brake system.

Xe is a broad word meaning vehicle. Depending on context, it can mean a car, bike, motorcycle, etc.

In lốp xe, the word xe is general: vehicle tire or simply tire. But because the last clause says xe máy, we understand the whole sentence is about a motorcycle.

• lốp xe = the vehicle’s tire
• xe máy = motorcycle / motorbike

So the first clause does not need to repeat xe máy.

Yes. Lốp xe thủng is very natural and common.

Difference in feeling:

• lốp xe thủng = simple statement of condition
• lốp xe bị thủng = emphasizes that the tire has suffered this problem

The version with bị can sound a bit more explicit about the negative result, but both are correct in everyday Vietnamese.

The same idea applies to:

• má phanh mòn
• má phanh bị mòn

It is one sentence made of three short clauses separated by commas, listing problems:

1. Lốp xe bị thủng
2. má phanh bị mòn
3. xe máy rung

This kind of comma-separated list is common when describing multiple issues, especially in repair or inspection contexts. In English, you might also translate it as separate sentences or as a list.

Vietnamese often omits information that is already clear from context.

Here, once the topic is the motorcycle, the sentence can simply list its problems:

• lốp xe bị thủng
• má phanh bị mòn
• xe máy rung

English often prefers possessives like the motorcycle’s tire, its brake pads, etc., but Vietnamese usually keeps things shorter if the meaning is obvious.

They mean:

• thủng = punctured, pierced through, having a hole
• mòn = worn, worn down, eroded by use
• rung = vibrate, shake

So the sentence lists three different mechanical issues:

• a punctured tire
• worn brake pads
• a vibrating motorcycle

Yes, but the given order is natural because it sounds like a checklist of symptoms or problems.

Current order:

• Lốp xe bị thủng, má phanh bị mòn, xe máy rung.

You could change the order if you want to highlight a different issue first, for example:

• Xe máy rung, má phanh bị mòn, lốp xe bị thủng.

That would still be grammatical, but the emphasis changes. The original order feels like a practical inspection report.

A rough pronunciation guide is:

• lốp xe ≈ lope seh
• bị ≈ bee with a heavy falling tone
• thủng ≈ somewhat like thoong, but shorter and with Vietnamese vowel quality
• má phanh ≈ mah fanh
• mòn ≈ mawn with a low falling tone
• xe máy ≈ seh maai
• rung ≈ zoong in the North, closer to yoong or zoong depending on accent

Tones matter a lot here, especially in words like lốp, bị, má, mòn, and máy. If you are learning pronunciation, it is best to listen to native audio rather than rely only on English approximations.

Yes, very natural. It sounds like a short diagnostic summary or a list of faults a mechanic might say or write.

It is concise and practical, which fits repair language well. A mechanic might also say a slightly fuller version such as:

• Lốp xe bị thủng, má phanh bị mòn, và xe máy bị rung.

But the original is already perfectly natural.