wǒmen xūyào gēnghuàn sǔnhuài de língjiàn.

Chinese usually follows Subject + Verb + Object, just like English, but modifiers come before the noun they describe.

So the sentence breaks down like this:

• 我们 = we
• 需要 = need to / need
• 更换 = replace
• 损坏的零件 = damaged part(s) / the damaged component(s)

A literal structure is:

• We + need + replace + damaged + de + parts

The key difference from English is that 损坏的 comes before 零件, because Chinese puts descriptive phrases before the noun.

需要 means to need or to require.

In this sentence, 需要 + verb means need to do something:

• 需要更换 = need to replace

It can also be followed by a noun:

• 我需要帮助。 = I need help.
• 我们需要时间。 = We need time.

So 需要 is very flexible:

• 需要 + noun
• 需要 + verb phrase

In your sentence, it is followed by the verb 更换.

In Chinese, you usually do not need a separate word equivalent to English to after verbs like need, want, like, etc.

So:

• 需要更换 = need replace = need to replace
• 想去 = want go = want to go
• 可以做 = can do = can do

This is very common in Chinese. English often needs to, but Chinese usually does not.

更换 means to replace or to change out, and it is a bit more formal or technical than 换.

Comparison

• 换 = change, swap, exchange, replace
• 更换 = replace, change out, usually more formal and common in instructions, repairs, maintenance, or technical situations

For example:

• 换衣服 = change clothes
• 换电池 = replace the battery
• 更换零件 = replace parts/components

In your sentence, 更换 sounds very natural because 零件 is a technical/mechanical word.

损坏 can function as both a verb and a descriptive word depending on context.

As a verb

• 机器损坏了。 = The machine was damaged / broke down.

Before a noun

• 损坏的零件 = damaged parts

So in your sentence, 损坏 is describing 零件, which makes it work like damaged in English.

A useful way to think of it is:

• 损坏 = to be damaged / damaged
• 损坏的零件 = the parts that are damaged

的 is used to connect a modifier to a noun.

Here:

• 损坏 = damaged
• 零件 = parts/components
• 损坏的零件 = damaged parts

So 的 marks that 损坏 is describing 零件.

You can think of 损坏的零件 as meaning:

• the parts that are damaged
• damaged parts

This pattern is extremely common in Chinese:

• 新的手机 = new phone
• 贵的东西 = expensive thing
• 昨天买的书 = the book bought yesterday

Yes. That is a very helpful way to understand it.

Chinese often uses the pattern:

• [description / verb phrase] + 的 + noun

So:

• 损坏的零件 literally behaves like
  damaged + de + parts
• but it can also be understood as
  the parts that are damaged

This is one of the most important Chinese grammar patterns because it covers both:

• simple adjectives before nouns
• longer relative-clause-like descriptions before nouns

Chinese nouns usually do not change form for singular or plural.

So 零件 can mean:

• a part
• parts
• component
• components

The exact number is understood from context.

In this sentence, English could translate it as either:

• We need to replace the damaged part.
• We need to replace the damaged parts.

If Chinese wants to be more specific, it can add a number or other clue:

• 一个损坏的零件 = one damaged part
• 两个损坏的零件 = two damaged parts
• 这些损坏的零件 = these damaged parts

Chinese does not use articles like English a, an, and the.

So 零件 by itself does not tell you whether it is:

• a part
• the part
• parts
• the parts

That information comes from context.

If Chinese wants to make it more specific, it can use words like:

• 一个零件 = a part
• 这个零件 = this part
• 那些零件 = those parts

In your sentence, the context decides whether English should use the damaged part(s).

Yes, very often.

Chinese frequently drops the subject when it is already clear from context.

So in the right situation, you might simply hear:

• 需要更换损坏的零件。

This could still mean:

• We need to replace the damaged parts
• It is necessary to replace the damaged parts
• Need to replace the damaged parts

This kind of omission is common in conversation, instructions, and technical writing.
Including 我们 makes the subject explicit: we.

It sounds fairly neutral to somewhat formal/technical.

That comes mainly from:

• 更换 instead of the simpler 换
• 零件, which is a technical word meaning part/component
• 损坏, which is also common in repair or maintenance contexts

So this sentence would sound very natural in contexts like:

• repairs
• maintenance
• engineering
• customer service
• equipment inspection

In casual everyday speech, someone might also say:

• 我们得换坏了的零件。

That is less formal and more conversational.

The pinyin is:

• 我们 — wǒmen
• 需要 — xūyào
• 更换 — gēnghuàn
• 损坏 — sǔnhuài
• 的 — de
• 零件 — língjiàn

A few pronunciation notes:

• 们 in 我们 is usually a neutral tone
• 的 is also usually a neutral tone
• xū in 需要 is pronounced with the ü sound, even though it is written xu
• 零 is líng, not lín

A natural rhythm is:

Wǒmen xūyào gēnghuàn sǔnhuài de língjiàn.

The main content words carry the stress:

• 需要
• 更换
• 损坏
• 零件

Yes, you could, but the tone changes a little.

坏的零件

• more everyday
• simpler
• often means broken/bad parts

损坏的零件

• more formal
• more precise
• common in written, technical, or repair-related contexts
• often means damaged parts

So both are possible, but 损坏的零件 fits better in a repair or technical sentence like this one.

Yes. In this sentence, 更换损坏的零件 works as the action that is needed.

Structure:

• 需要 = need
• 更换损坏的零件 = replace the damaged parts

So the whole sentence is:

• 我们 = subject
• 需要 = main verb
• 更换损坏的零件 = what we need to do

You can think of it as:

• We need [to replace the damaged parts].

That bracketed part is the action phrase.