Terms of the deal were not disclosed, but the team also extended the contract of crew chief Paul Wolfe.
"The winning combination of Brad Keselowski and Paul Wolfe has been terrific for Penske Racing, and we are excited to announce that they will continue to work together," said team owner Roger Penske. "With one NASCAR championship and numerous wins in both the Nationwide Series and the Cup Series to their credit, this has proven to be a special pairing. Although Brad, Paul and the No.2 team fell short of winning the Cup Series title this season, we know they will continue to be championship contenders for years to come."
Keselowski and Wolfe won the Nationwide championship for Penske in 2010. Wolfe was named the crew chief for Keselowski and the No.2 car in the Sprint Cup Series for 2011, and the duo picked up three victories on the way to a fifth- place finish in the final standings.
"It's great to know that Paul and I will continue to work together to bring wins and championships to Penske Racing and its sponsors," said Keselowski, who first joined Penske Racing for the final three races of the 2009 season. "We've definitely built something special here with this team, and we'll continue to get better to reach our goals."
Over the course of the last two seasons, Keselowski and Wolfe have teamed to produce nine wins, six pole victories and 36 top-five finishes across the Nationwide and Cup Series.