One problem related to catalytic convertor has been reported for the 1999 Subaru Forester. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 1999 Subaru Forester based on all problems reported for the 1999 Forester.
While driving, the engine light illuminated. The mechanic repaired the catalytic converter once, but the consumer continued to have the same problems. The converter was replaced once and the #02 sensor was repaired forced. Two dealers suggested that this model vehicle had a problem with this component when the vehicle was at or below 100k miles.