One problem related to abs brake fail has been reported for the 1997 Volvo 850. The most recently reported issues are listed below.
Issue my abs control block motor operated for 30-40 seconds recently while traveling at 25-30 mph with no abs/trax lites illuminated. (buzzing sound under the hood) brakes were very hard with reduced stopping power during motor operation on slowing to 5 mph. The motor stopped and abs/trax lites illuminated with brake function returning to normal. Based on my experience I consider this a recall issue. . Read more...