Pongo un parche en la cámara de aire.

Pongo is the first-person singular present tense form of poner:

• poner = to put / to place
• pongo = I put / I’m putting

So the sentence means I put a patch on the inner tube or I’m putting a patch on the inner tube, depending on context.

This is an irregular verb form, so it does not become pono. A few common verbs have this -go form in the yo form:

• poner → pongo
• hacer → hago
• salir → salgo
• tener → tengo

In Spanish, subject pronouns are often omitted because the verb ending already tells you who the subject is.

• pongo already means I put / I’m putting

So (yo) pongo un parche... is grammatical, but the yo is usually unnecessary unless you want emphasis or contrast:

• Yo pongo un parche, y tú revisas la rueda. = I put on a patch, and you check the wheel.

Here, parche means patch, specifically the kind used to repair a puncture.

It is a masculine noun, so it takes:

• un parche = a patch
• el parche = the patch

In other contexts, parche can also mean other kinds of patches, such as a fabric patch or even a medical patch, but in this sentence it clearly refers to a repair patch.

Cámara de aire means inner tube.

Literally, it is something like air chamber, but that is not how English normally says it. In bicycle or tire-related Spanish, cámara de aire is the standard term for the inflatable tube inside the tire.

So:

• la cámara de aire = the inner tube

In everyday speech, some people may simply say la cámara if the context is obvious.

Because cámara is a feminine noun in Spanish.

So you say:

• la cámara
• una cámara

Even though the phrase includes de aire, the gender is determined by the main noun, which is cámara, not aire.

Compare:

• la cámara de aire
• la cámara del neumático

The noun after de does not change the gender of the main noun.

Yes, in English we would usually say on the inner tube, but Spanish often uses en in places where English uses on, in, or onto, depending on context.

So:

• Pongo un parche en la cámara de aire
  = I put a patch on the inner tube

Here, en is the natural preposition in Spanish. You should not translate prepositions too literally word-for-word.

Un parche means a patch — an indefinite patch, not a specific one already identified.

• un parche = a patch
• el parche = the patch

So this sentence presents the patch as something being applied, without emphasizing that it is a previously known or specific patch.

If the patch had already been mentioned, you might say:

• Pongo el parche en la cámara de aire. = I put the patch on the inner tube.

It can mean either one in many contexts.

Spanish present tense often covers both:

• I put
• I am putting

So Pongo un parche en la cámara de aire could mean:

• I put a patch on the inner tube
  or
• I’m putting a patch on the inner tube

The exact meaning depends on context. If you want to make the ongoing action extra clear, Spanish can also use:

• Estoy poniendo un parche en la cámara de aire. = I am putting a patch on the inner tube.

Yes, it is natural and understandable. However, depending on region and situation, you may also hear other versions.

For example:

• Le pongo un parche a la cámara de aire.
• Estoy poniendo un parche en la cámara.

The version with le and a is also common because Spanish often treats the thing being repaired as an indirect object:

• Le pongo un parche a la cámara de aire. Literally: I put a patch to/on the inner tube

Also, vocabulary varies by region:

• llanta
• neumático
• goma
• cubierta

But cámara de aire is widely understood for inner tube.

In this sentence:

• Pongo = the verb
• un parche = the direct object
• en la cámara de aire = a prepositional phrase showing location/placement

So the structure is basically:

• I put
  • a patch
    • on the inner tube

That means un parche is the thing being put, and en la cámara de aire tells you where it is being put.

Usually, en is the better choice here.

• en is the normal preposition for applying or placing something onto a surface in many Spanish contexts.
• sobre often means on top of, above, or regarding/about, and it can sound less natural here.

So for repairing an inner tube, en la cámara de aire is the more idiomatic option.

It is best to learn it as a set expression meaning inner tube.

If you translate word by word, you get something like air chamber, but that is not the normal English term for this object. This is a good example of why vocabulary should often be learned in chunks rather than literally.

So treat this as a unit:

• cámara de aire = inner tube

Yes. The Spanish present tense can describe:

• something happening now
• a habitual action
• a general process

So Pongo un parche en la cámara de aire could mean:

• I’m putting a patch on the inner tube
  or
• I put a patch on the inner tube / I usually put a patch on the inner tube

If you wanted to make the habitual meaning clearer, context would usually do that, or you could say something like:

• Cuando se pincha, pongo un parche en la cámara de aire. = When it gets punctured, I put a patch on the inner tube.