Harte's later career at Leeds was not so successful, as his lack of pace was exposed and his goals started to dry up. He did score a penalty against Portsmouth in his last season at the club, but Leeds went on to lose that game and were relegated to the Championship. Levante Despite rumours, earlier in his career, that clubs including Barcelona and Milan were offering as much as £11 million for his services, in the end it was newly promoted Spanish La Liga club Levante who signed him on 9 July 2004, following the financial crisis at Leeds. Harte scored Levante's first La Liga goal in 41 years in a 1–1 draw with Real Sociedad, with a free-kick on the first day of the 2004-05 season. He suffered a groin injury in January which sidelined him for most of the remainder of the season. Levante, in their first season in La Liga since 1965, were up to 5th position at one point (when Harte was healthy), but they still suffered relegation on the final day of the season due to a loss to Villarreal. The following season in the Segunda División was successful for both Harte and Levante as he was consistently first-choice left back, he scored nine goals in all competitions, and Levante were promoted back to La Liga at their first attempt. However, in the following season in La Liga, Harte was injured in August and failed to regain his place in the team once he returned from injury in January. This time though Levante finished in 15th place and were safe from relegation. Before the start of the 2007–08 La Liga season, Levante coach Abel Resino told Harte that he was not in his plans, and Harte and the club agreed to terminate the remaining 12 months of his contract. Sunderland On 29 August 2007, after a trial period, it was announced that Harte had joined former international team-mate Roy Keane at Sunderland. He was initially signed on a one-year contract. However, he was subsequently transfer listed in January 2008 by Keane. Harte made his Sunderland debut as a late substitute in the club's 3–2 defeat away at Arsenal. On 4 June 2008, along with seven other players, he was released by Sunderland after only one year at the club. During summer 2008 Harte spent time on trial at Wolverhampton Wanderers but rejected their eventual offer