La reparación tuvo éxito.

Because tuvo is the preterite form of tener, used for a completed event in the past.

• La reparación tuvo éxito presents the repair as a finished event, and says that it succeeded.
• La reparación tenía éxito sounds unusual in most contexts, because tener éxito is normally treated as something that happens or is achieved, not as an ongoing background state.

So in this sentence, tuvo is the natural choice.

Spanish often expresses this idea with the fixed phrase tener éxito, literally to have success.

So:

• La reparación tuvo éxito = The repair was successful / succeeded

Spanish also has the verb triunfar, but that is less natural here. For a repair, tener éxito is the standard expression.

Because reparación is a feminine noun.

A very common pattern is that nouns ending in -ción are feminine:

• la reparación
• la información
• la solución

So the article must be la.

In the expression tener éxito, Spanish normally uses éxito without an article.

So you say:

• tener éxito
• tuvo éxito
• han tenido éxito

This works like a set phrase. If you add an article, the meaning usually changes slightly or becomes more specific:

• tuvo un éxito enorme = it was a huge success
• el éxito de la reparación = the success of the repair

But in the basic expression, no article is needed.

Éxito is masculine:

• el éxito
• un éxito

Even though the sentence does not show an article before it, if you needed one, it would be masculine.

It has a written accent because the stress falls on the first syllable: Éxito.

Without the accent, Spanish pronunciation rules would suggest a different stress pattern. The accent mark shows the correct stress clearly.

It is pronounced roughly like:

• ÉK-see-toh

Yes, absolutely. La reparación fue un éxito is very common and natural.

There is a slight difference in feel:

• La reparación tuvo éxito = the repair succeeded
• La reparación fue un éxito = the repair was a success

In many contexts, they mean almost the same thing.

Not always. Reparación often means repair, but the exact translation depends on context.

For example:

• La reparación del coche = the repair of the car
• La reparación de una avería = fixing a breakdown

Spanish may also use verbs like arreglar or reparar depending on the situation.

In this sentence, reparación is perfectly natural.

Usually no, not in the same sense.

• fue un éxito = it was a success as a completed event
• era un éxito = it was a success in a descriptive/background sense

For a single completed repair, fue is normally the right choice. Era would only fit in a special context, for example if you were describing how something was seen over a period of time.

The infinitive is tener.

Here is the relevant form:

• tener = to have
• tuvo = he/she/it had

So la reparación tuvo éxito literally uses had, but the whole phrase means was successful / succeeded.

A simple pronunciation guide is:

La reparación tuvo éxito
lah reh-pah-rah-thee-ON TOO-boh EK-see-toh in much of Spain

In many Latin American varieties, -ción sounds more like -SYON instead of -THYON.

Main stress:

• reparaCIÓN
• TUvo
• Éxito

It can be used with both.

For example:

• El proyecto tuvo éxito = The project was successful
• La operación tuvo éxito = The operation was successful
• Tuvo éxito en su carrera = He/She was successful in his/her career

So it is a very flexible expression.

It is completely standard and natural in Spain Spanish, and also widely understood and used across the Spanish-speaking world.

Nothing in La reparación tuvo éxito is especially regional. The main regional difference you might notice is just pronunciation, not grammar or vocabulary.