2020 Subaru Crosstrek Power Train

The rear differential on my PHEV Crosstrek failed around 31,500 miles. My spouse was driving under 30mph and turning, and heard a clunking/popping/metal-on-metal sound that persisted intermittently for the remainder of the drive home. Since then on 1/8/26, the sound has been aggravated and persistent, every 45 seconds or so while driving, mostly while turning, so we brought it in and were alerted to significant and large metal shavings in the rear differential oil. The current service bulletin (03-95-24) the dealership is relying on to inform the replacement describes sounds much subtler than the sounds my car is making and I remain concerned about other components in my vehicle that may be impacted by this failure. This kind of failure is a safety risk and did occur in traffic in my spouse’s case. The metal-on-metal sounds and drivetrain resistance are alarming. Thankfully my spouse was able to safely get home and alert me to the situation so we could take it in. I have not engaged in any of the vehicle uses that typically relate to rear differential failures; I don’t engage in heavy off-road use or tow heavy trailers with my vehicle, I have only had my tires replaced at Subaru, and the only gear/differential oil was from Subaru. I also did not have any deleterious or obvious gaps in differential/gear oil replacement that could reasonably cause this issue, as confirmed by a dealership mechanic. I have researched extensively about this unusual (and expensive) part failure and have alerted SOA to my concerns. My research is showing it appears to be a trend warranting further investigation.

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.

What component of system failed: transmission At low speeds, my car makes a low moaning sound. I took it to the subaru dealership and after 2.5 hours, they said it's an issue with the transmission and needs a full replacement. Safety: According to a local subaru dealer's website, "While it might be tempting to keep driving despite a known transmission fault, especially if the car seems to be running ‘fine’, there are inherent risks. Firstly, there’s the potential for the fault to escalate, causing more significant damage to the transmission system. This could, in turn, result in costlier repairs down the line. Secondly, and more crucially, a transmission fault could lead to unpredictable vehicle behavior, especially when changing gears. This unpredictability can be hazardous, not just for the driver but for others on the road as well." Problem reproduced: YES on 1/20/25 at Dewey Griffin Subaru in Bellingham, WA Inspected: YES on 1/20/25 at Dewey Griffin Subaru in Bellingham, WA. Warning lamps: NO

Transmission began making a whining noise at low speeds accelerating/ and backing up. Slight hesitation when accelerating. Transmission failed at 6k miles- confirmed by dealer and replaced. Now again at 34k miles same issue- transmission confirmed to be issue again by dealer. Subaru is in the process of sending a technician to dealer to inspect. No warning or messages displayed. Unacceptable quality/safety for a vehicle purchased new and all of the maintenance schedule followed.

The contact owns a 2020 Subaru Crosstrek. The contact stated while shifting the vehicle into reverse, the vehicle launched forward without warning. The vehicle was not diagnosed or repaired. The dealer was not contacted. The manufacturer was not contacted. The failure mileage was 12,000.

The vehicle has experience numerous times now, and has been to the dealer for repairs regarding an unanticipated loss of all ability to accelerate or maintain speed until the vehicle is shutdown and restarted. This has caused significant stress when traveling on a fast moving freeway in the fast lane and then having to quickly get to the shoulder to "power-cycle" the vehicle. The dealer has seen the vehicle 5 times for this issue in the 10 months we have owned it, starting at 6k miles and we just got it back from 2 weeks with the dealer; today it has 9k miles. The dealer has told is that the vehicle losing all power and ability to accelerate or maintain speed is a safety feature. I feel having my wife and three children in a vehicle the significantly increases the chances for collision as very much the opposite of a safety feature. We have tried working with the dealer over the past 6 months and 3k miles, but need the help of an advocate who can influence the dealer to correct the issue before someone gets hurt or worse. The date shown below is only the first instance of many instances of power loss.