Mechanical issues and lawsuit[edit] Some Boxster models manufactured between May 4, 2001 and February 21, 2005 have suffered catastrophic engine failure due to a fault with the intermediate shaft (IMS) bearing, which has resulted in a class action lawsuit against Porsche Cars North America (referred to as Eisen v. Porsche Cars North America).[21] A settlement was agreed in March 2013, subject to court approval. Other types of engine failure experienced in the Boxster including cracking of the cylinders (D-chunk issue), and problems with the early castings of the engine cases (case porosity issue) are not addressed by this suit. Additionally, the issues are not limited to the model years covered in the suit, or the Boxster, as the 911's share the same type of engine.