Rear engine oil leaks may occur because Subaru used a plastic oil baffle plate that failed. This issue is often misdiagnosed as a crankshaft rear oil seal leak or an oil pan gasket leak. Subaru released an updated design of the baffle plate made from aluminum that stops the oil leak.
Oil leak from rear of engine due to failed plastic oil baffle plate on Subaru Impreza Outback
Average mileage: 68,000 (39,000–97,000)
Engines affected: 2.2L 4 Cylinder, 2.5L 4 Cylinder
6 people reported this problem
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Oil leaks from baffle plate
Same thing. A mechanic diagnosed it as a rear main seal leak. But I didn't quite think so. I used an additive that would have corrected the leak if it was a main seal. I did not. Now I know the real problem. Thankyou!