Sin Frenos (Without Brakes) is the fourth and final studio album release from the Spanish music duo, La 5ª Estación.

Throughout the end of 2008, rumors circulated of a break-up of the then three members of La 5ª Estación, but were denied by the group's vocalist Natalia Jiménez.

Four songs: Que Te Quería, Mis Labios Por Tus Piernas, Esta Noche No, and Sin Salida were produced by Tom Lord Alge.

The iTunes edition of the album included a bonus pre-order track titled Es Cierto.

Sin Frenos was nominated in the 2009 Latin Grammy Awards for best record by a Pop duo/group, but lost to Reik's Un Dia Más.