Sản phẩm có lỗi.

• sản phẩm = product
• có = have / has
• lỗi = fault, defect, error, problem

So word-for-word, the sentence is roughly product has defect.

Natural English translations include:

• The product has a defect.
• The product is faulty.
• There is a problem with the product.

Vietnamese usually follows a Subject + Verb + Object/Complement pattern, much like English.

Here:

• Sản phẩm = subject
• có = verb
• lỗi = object/complement

So the structure is:

[The product] [has] [a defect]

That is why Sản phẩm có lỗi feels straightforward and natural.

In this sentence, yes, có is best understood as has.

But có is a very common Vietnamese word with several uses depending on context, such as:

• to have
• there is / there are
• sometimes part of a yes/no emphasis structure

In Sản phẩm có lỗi, it simply means has:

• Sản phẩm có lỗi = The product has a defect

Here, lỗi means fault, defect, error, or problem.

It can refer to different kinds of issues depending on context:

• a manufacturing defect
• a technical error
• a flaw in a product
• a bug or malfunction

So lỗi is a flexible word. In this sentence, it usually means the product is defective or faulty.

They are similar, but not exactly the same.

• Sản phẩm có lỗi = The product has a defect / has a problem
• Sản phẩm bị lỗi = The product is defective / The product has been affected by a fault

A useful way to feel the difference:

• có lỗi focuses on the existence of a fault
• bị lỗi often sounds more like the product is in a faulty state or has gone wrong

In everyday Vietnamese, bị lỗi is very common when talking about broken or malfunctioning products, devices, software, etc.

So:

• Sản phẩm có lỗi = correct and understandable
• Sản phẩm bị lỗi = often more natural in many real-life situations

Yes. Vietnamese often allows shorter noun phrases or descriptive phrases depending on context.

For example:

• sản phẩm lỗi = defective product
• hàng lỗi = defective goods
• máy lỗi rồi = the machine is faulty now / the machine has gone wrong

So lỗi can behave a bit like:

• a noun: a defect / an error
• or something close to an adjectival description in context: faulty / defective

This flexibility is common in Vietnamese.

Vietnamese does not use articles the same way English does.

English requires things like:

• the product
• a defect

Vietnamese usually does not need separate words for the or a/an in simple sentences like this.

So:

• Sản phẩm can mean the product, a product, or products, depending on context
• lỗi can mean a defect, the defect, or just defect/fault in a general sense

You understand the exact meaning from context rather than from articles.

By itself, sản phẩm does not clearly mark singular or plural.

It can mean:

• the product
• a product
• products
• the products

Context tells you which one is meant.

If the speaker wants to make plurality clearer, they can add something:

• các sản phẩm có lỗi = the products are defective / the products have defects
• một sản phẩm có lỗi = a product has a defect

So in your sentence, Sản phẩm có lỗi is most naturally understood as The product has a defect or The product is defective, but it is not grammatically forced to be singular.

Yes, it is grammatical and understandable.

However, depending on situation, native speakers may also say:

• Sản phẩm bị lỗi.
• Sản phẩm này bị lỗi. = This product is defective.
• Sản phẩm có vấn đề. = The product has a problem.

Your sentence is perfectly fine, but bị lỗi is often especially common when talking about faulty goods.

It can refer to either, depending on context.

• For a physical item, it can mean the product is defective
• For software, electronics, or digital products, it can mean the product has an error/bug/problem

Because lỗi is broad, it works for both physical and technical problems.

Yes, it is the same core word lỗi, but the meaning changes by expression.

• lỗi by itself can mean fault, error, or wrongdoing
• xin lỗi literally relates to asking forgiveness for a fault, but as a fixed expression it means sorry / excuse me

So in:

• Sản phẩm có lỗi → The product has a fault
• Xin lỗi → Sorry / excuse me

Same core word, different expression.

A rough pronunciation guide is:

• Sản ≈ sahn with a dipping/creaky tone
• phẩm ≈ fuhm or phuhm with a low broken tone
• có ≈ gaw or northern kaw with a rising tone
• lỗi ≈ loy with a dipping/creaky tone

A rough full approximation: sahn fuhm gaw loy

A few notes:

• ph in Vietnamese sounds like f
• sản and lỗi both have tones that English does not really have
• tones matter a lot, so listening to native audio is important

You can say:

• Sản phẩm này có lỗi.
• Sản phẩm này bị lỗi.

Here này means this.

So:

• Sản phẩm này có lỗi = This product has a defect
• Sản phẩm này bị lỗi = This product is defective / This product has a fault

A few natural options are:

• Sản phẩm có lỗi. = The product has a defect.
• Sản phẩm này bị lỗi. = This product is defective.
• Sản phẩm gặp lỗi. = The product has encountered an error/problem.
• Sản phẩm có vấn đề. = The product has a problem.

In customer service, people often say:

• Sản phẩm này bị lỗi. Tôi muốn đổi/trả hàng.
  • This product is defective. I want to exchange/return it.

So your sentence is a good base, but in real interaction, speakers often expand it with này, bị lỗi, or a follow-up request.