recall notice in USA courtesy of APR http://www.goapr.com/tsp/3f4b0448-ab...108ccf2271.pdf

Due to high load on the sintered cam which drives the high pressure fuel injection pump and the vacuum pump in the affected vehicles, the camshaft lobe has the potential to unexpectedly shear off from the camshaft. If this happens, vacuum pump power will be lost so that the pump will not deliver further vacuum supply to the brake booster, and reduced engine power (limp home mode) will cause the Malfunction Indicator Light (MIL) to come on.

Unexpected, increased need for braking effort after vacuum reserve has been depleted can lead to a crash without warning.