The rear differential on my Subaru Crosstrek Hybrid has failed twice. The first failure occurred around 12,000 miles and the second around 50,000 miles, both while maneuvering slowly in a parking lot. There were no warning lights or messages beforehand. The failure caused grinding and drivetrain resistance while turning. During the second incident, a certified Subaru dealer confirmed the rear differential had failed again. They also discovered that Subaru had issued a revised version of the differential that is no longer compatible with the original axles, requiring additional parts to complete the repair. I was informed the original design has been discontinued, suggesting Subaru was aware of an issue. This kind of drivetrain failure is a significant safety risk, especially if it were to occur at higher speeds or in traffic. The issue has now occurred twice on my vehicle under normal driving conditions, and was verified both times by a 2 Subaru dealerships in Southern California. When I returned to pick up my vehicle, I was told by the service technician that another hybrid Crosstrek had just come in for the exact same failure. Additionally, a local independent Subaru performance shop mentioned they have performed three similar rear differential replacements this year. This clearly appears to be a recurring problem, potentially linked to a design flaw, and I believe it warrants further investigation.