He previously competed mainly in his native Sweden including the Scandinavian Touring Car Championship and Porsche Carrera Cup Scandinavia.

In 2008 Haglöf moved to the Mini Challenge Germany, finishing third in his debut season and winning the championship the following year.

In 2014 Haglöf stepped down from full-time racing to concentrate on the management of the team, but returned for the final round of the season at Solvalla and Mantorp Park.

Alongside his commitments in the Scandinavian Touring Car Championship, Haglöf also competed in GT racing in Sweden.

In 2019 Haglöf will enter the World Touring Car Cup, driving for his PWR Racing team in CUPRA León TCR alongside Mikel Azcona.