Two problems related to power assist brake vacuum have been reported for the 1999 Chrysler 300M. The most recently reported issues are listed below.
My Chrysler 300m loses its power brakes when its cold. The power booster seems to be the problem only when its cold.
Complete brake failure due to a mechanical break down of the vacum assist unit. Similar to below previous complaint in 2002. What bothers me is that the part is on back order and seems to be in great demand across the country. When it goes - you have no brakes! luckily I was in a parking lot at work and no accident occured. Results : 1 | all records displayed make : Chrysler model : 300m year : 1999 crash : no fire : no number of injuries: 0 odi id number : 10000136 date of failure: December 8, 2002 component: service brakes, hydraulic:power assist:vacuum.