One problem related to gas recirculation valve (egr valve) has been reported for the 2009 Subaru Forester. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Subaru Forester based on all problems reported for the 2009 Forester.
Stopped to fill up car with gas on way to work and when I restarted the engine I heard a real loud knocking noise. As I pulled away the car was very sluggish and the noise from the engine started getting louder. I went to get off the road and turn into a parking lot and the car died and I narrowly missed hitting a baltimore city work truck as the power steering and power brakes were non responsive because the engine had cut off. I was very lucky to not crash into the work truck. I had the car towed to valley motors Subaru in cockeysville and they called to inform me that I need a new at least a new lower block if not a whole engine replacement. I looked online for some information on any known issues with style of car and engine and was shocked to see that in April 2008 a " stop sale" was issued by Subaru of America on my exact car. Legacy vehicles have been added to the stop sale we regret to inform you that we must place an immediate stop sale order on all of the 2008/2009 Subaru impreza, Forester and legacy vehicles equipped with a 2. 5l turbo engine produced with the beginning chassis number and later as shown below. Model body type chassis number production date forester wagon 701045 or later 2008/01/08 or later the reason for this immediate quality assurance action is that there have been several reports of "engine knocking noise" from other markets on vehicles produced after the production dates listed. Initial investigation confirms an internal wear issue on the failed units. I bought my car in October 2009 and you can see the VIN # is pretty close in the range and I have read in forums of people with almost identical VIN's as mine of having the same exact issue.