Questions & Answers about 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.