Villarreal have confirmed the appointment of Miguel Angel Lotina until the end of the season.
Lotina, who has previously taken charge of sides including Osasuna, Celta Vigo, Espanyol and Real Sociedad, has been out of work since leaving Depotivo La Coruna in May last year.
"The challenge is exciting because I've come to an important team in the Spanish league," Lotina said. "Our situation is not comfortable, but I have a team which excites me a lot. I am delighted to be here and I have a great amount of hope."
He added: "I spoke to the team as a whole and then the players individually to see how they are emotionally.
"I see them eager to progress, but there is obviously concern as well. I cannot change the philosophy and style of Villarreal, who have always been known for playing good football."
The 54-year-old replaces Jose Molina, who was sacked on Sunday with the team just one place and three points above the relegation zone, having won just three of his 11 games in charge.
Molina was the club's third coach this season, but club president Fernando Roig insists the the most recent change was essential and is confident Lotina can pull them away from danger.
"We have made a decision that is not usually taken at this club, which is changing the coach twice (in one season)," he said. "It was necessary and we've opted for an experienced coach.
"We are all aware of what we're up against and this club will do everything possible to change the situation. We will make every effort to take this project forward. We have 11 finals and we are convinced we will succeed."