December 30 2009

California Class Action Suit Pursues BMW N54 Issues

A class-action lawsuit is being brought against BMW North America for failure to properly repair issues with the company's N54 turbocharged engines. The suit, which ahs been brought to the US District Court for the Central District of California, alleges that BMW reprogrammed customer's ECU (Engine Control Units) without their knowledge or consent to address possible fuel pump issues.

The engine in question is the 3.0-liter twin-turbo six-cylinder found in BMW 135i, 335i, 535i, Z4 sDrive35i and X6 xDrive35i models from 2007 to present. The problem stems from the fact that after customers' cars received the ECU update, they often began to experience loss of power at lower engine speeds, decreased fuel efficiency, and most notably, turbo lag under acceleration.

Further details about the class-action lawsuit can be found at