Die Verkäuferin hat gesagt, der Reißverschluss lasse sich leicht reparieren, wenn ich die Jacke morgen zurückbringe.

German often has indirect speech in two ways:

• with dass:
  Die Verkäuferin hat gesagt, dass der Reißverschluss sich leicht reparieren lässt.
• without dass, using a separate clause after a comma:
  Die Verkäuferin hat gesagt, der Reißverschluss lasse sich leicht reparieren.

Your sentence uses the second pattern. It is especially common when German uses Konjunktiv I to report what someone said.

So after hat gesagt, German does not always need dass.

Lasse is Konjunktiv I of lassen in the 3rd person singular.

• Indicative: der Reißverschluss lässt sich leicht reparieren
• Konjunktiv I: der Reißverschluss lasse sich leicht reparieren

This form is commonly used in reported speech. It shows that the speaker is repeating what the salesperson said, rather than directly stating it as a fact.

In other words, lasse here means something like:

• she said the zipper could be repaired easily
• she said the zipper was easy to repair

The structure sich + infinitive + lassen means something like:

• can be ...
• is possible to ...
• is easy/difficult to ...

So:

• Der Reißverschluss lässt sich leicht reparieren
  = The zipper can be repaired easily
  = The zipper is easy to repair

It is a very common German pattern.

A few similar examples:

• Das Problem lässt sich lösen. = The problem can be solved.
• Die Tür lässt sich nicht öffnen. = The door can’t be opened.

So sich ... lassen is not reflexive in the English sense. It is just part of a fixed German construction.

Because der Reißverschluss is the subject of the clause:

• der Reißverschluss lasse sich leicht reparieren

The zipper is the thing that can be repaired, so it is grammatically the subject of lasse sich reparieren.

German uses the nominative case for the subject, so:

• der Reißverschluss = nominative
• den Reißverschluss = accusative

Even though English might make you think of repair the zipper as an object, this German structure is built differently: literally, the zipper lets itself be repaired easily.

Not really. In this sentence, sich is part of the fixed construction sich + infinitive + lassen.

So although sich is technically a reflexive pronoun, the whole phrase works idiomatically and usually means:

• can be repaired
• can be opened
• can be explained

So der Reißverschluss lasse sich leicht reparieren does not mean the zipper actively repairs itself. It just means the zipper is easy to repair or can be repaired easily.

Because wenn introduces a subordinate clause, and in German subordinate clauses send the conjugated verb to the end.

So:

• wenn ich die Jacke morgen zurückbringe

Breakdown:

• wenn = if/when
• ich = I
• die Jacke = the jacket
• morgen = tomorrow
• zurückbringe = bring back / return

This is standard German word order for subordinate clauses.

Compare:

• Main clause: Ich bringe die Jacke morgen zurück.
• Subordinate clause: ..., wenn ich die Jacke morgen zurückbringe.

The verb is zurückbringen, a separable verb, meaning to bring back / return.

In German:

• in a main clause, separable verbs split:
  Ich bringe die Jacke morgen zurück.
• in a subordinate clause, they stay together:
  ..., wenn ich die Jacke morgen zurückbringe.

So in your sentence, zurückbringe is one word because it comes at the end of a wenn clause.

Both are possible, but hat gesagt is very common in everyday spoken German.

• Die Verkäuferin hat gesagt ... = perfect tense
• Die Verkäuferin sagte ... = simple past

For many verbs, especially in conversation, German prefers the perfect over the simple past. So hat gesagt sounds natural and normal in spoken German.

You would often see sagte more in writing, storytelling, or formal style.

The reported statement is:

• der Reißverschluss lasse sich leicht reparieren

That is what the salesperson said, so German uses Konjunktiv I.

But the wenn clause:

• wenn ich die Jacke morgen zurückbringe

is just the condition attached to that reported statement. German normally leaves it in the ordinary form unless there is a special reason to mark it differently.

So the sentence means that the salesperson said: the zipper would be easy to repair if I bring the jacket back tomorrow.

Yes. In everyday German, many speakers would say:

• Die Verkäuferin hat gesagt, der Reißverschluss lässt sich leicht reparieren ...
• or ..., dass der Reißverschluss sich leicht reparieren lässt.

But lasse sich is the more classic reported-speech form, because it clearly marks the statement as something the salesperson said.

So:

• lasse sich = more explicitly reported / more formal / more written-style
• lässt sich = more everyday and direct

Because Verkäuferin means saleswoman / female sales assistant.

German often forms feminine job titles with -in:

• der Verkäufer = salesman / male sales assistant
• die Verkäuferin = saleswoman / female sales assistant

So die here is the feminine singular article.

Here it is best understood as if.

• ..., wenn ich die Jacke morgen zurückbringe. = ..., if I bring the jacket back tomorrow.

German wenn can mean both if and when, depending on context. In this sentence, it expresses a condition: the repair is easy provided that I bring the jacket back tomorrow.

So if is the natural interpretation here.

Yes. German normally uses a comma to separate the reporting clause from the following reported clause:

• Die Verkäuferin hat gesagt, der Reißverschluss ...

It is also required before the wenn clause:

• ..., wenn ich die Jacke morgen zurückbringe.

German commas are used more systematically than English commas in structures like this, especially with subordinate clauses.

Because in a subordinate clause, the conjugated verb goes to the end, and time expressions like morgen usually appear before that final verb.

So:

• wenn ich die Jacke morgen zurückbringe

is a normal order.

You could move elements around for emphasis, but this version sounds natural and neutral.

A helpful way to see it is:

• subject: ich
• object: die Jacke
• time: morgen
• verb: zurückbringe

Yes. A more learner-friendly version would be:

• Die Verkäuferin hat gesagt, dass sich der Reißverschluss leicht reparieren lässt, wenn ich die Jacke morgen zurückbringe.

This version may feel easier because:

• it includes dass
• it uses the more familiar lässt instead of lasse
• the reported speech is less formal

It means the same thing, but your original sentence uses a more advanced and very typical German reported-speech style.