Elektrik arızası yüzünden asansör tamir edilmeli.

In Turkish, when you link two nouns in an “izafet” (noun-noun compound), the second noun takes the 3rd person singular possessive suffix to show that the first noun possesses or relates to it. Here, elektrik (electricity) “owns” the breakdown, so arıza becomes arıza­sı, giving elektrik arızası (“electricity’s breakdown” → “electrical failure”).

Moreover, the postposition yüzünden (“because of”) also requires the preceding noun to carry a possessive suffix—so the same -sı serves both purposes.

Yüzünden is a postposition meaning because of or due to, used to introduce a cause (often negative). Its form is:

• noun + 3rd-person possessive suffix + yüzünden

In Elektrik arızası yüzünden, it literally means “because of the electrical failure.” It places the reason before the main clause.

Yes. All can express cause, but with slight differences:

• için is neutral and can mark cause or purpose (e.g. Yağmur için şemsiyemi aldım – “I took my umbrella because of the rain” or “for the rain”).
• dolayı and nedeniyle also mean “because of,” often interchangeable with yüzünden, but feel a bit more formal or bookish.
• yüzünden tends to emphasize an unwanted or negative result.

Example conversions:
• Elektrik arızası yüzünden... (common)
• Elektrik arızası nedeniyle... (formal)
• Elektrik arızası dolayısıyla... (formal)
• Elektrik arızası için... (neutral, but could be confused with “for the purpose of electrical failure” in some contexts)

tamir edil­­meli combines:
1) tamir etmek (to repair)
2) Passive suffix -il- → tamir edil- (to be repaired)
3) Necessitative/obligation suffix -meli → tamir edilmeli (must/should be repaired)

So it’s a passive voice with the necessitative mood (“has to be repaired”).

In Turkish, the general passive suffix is -il- or -in-, following vowel harmony. For verbs ending in -etmek, assimilation occurs:

1) et- → ed- (t → d between vowels)
2) add -il- → edil-
3) add infinitive -mek → edilmek

Combined with the noun: tamir etmek → tamir edilmek.

Both mean “to get repaired,” but:

• tamir edilmek is the formal passive of tamir etmek (often used in official/technical contexts).
• tamir olmak uses olmak (“to become”) to make tamir intransitive. It’s more colloquial:
  • Araba tamir oldu. vs. Araba tamir edildi.
  In most cases they’re interchangeable, though tamir edilmek feels slightly more formal.