One problem related to gas recirculation valve (egr valve) has been reported for the 2007 Subaru Outback. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Subaru Outback based on all problems reported for the 2007 Outback.
When the outside temperature is below 32 degrees f, there is a strong odour of exhaust fumes or gas coming from the engine. When you turn the climate control to the cabin air recirculating position the smell decreases dramatically. This car must be driven with a window partially open for fresh air for safety. The odour is strong enough to cause nausea. There are numerous problems on the internet regarding this issue with Subaru. Subaru has never issued a recall to the best of by knowledge.