2021 Subaru AscentRecalls, problems, MPG & safety

“Twin Falls Subaru left me in a dangerous position with my transmission failing catastrophically on the highway 72 hours after major service is a severe safety hazard My 2021 Subaru Ascent with 56,420 miles, still under the 60,000 mile/5 year warranty, went to Twin Falls Subaru with diagnostic codes P0137, and P2096 on 8/15/26 they replaced the following, the engine harness,. transmission harness, transmission pressure sensor and ecm. They said the root problem was the secondary pressure switch, Subaru of America & Twin Falls Subaru said those repairs weren’t covered under warranty and I had to pay $3000 out of pocket, SOA covered the remaining $5100. I picked it up 10/13/26, (on 10/16/26, three days later my check engine light came on along with the AT oil temp and transmission flashing on the dash, the diagnostic codes I received were P0700 P0841 P0890, Subaru Of America paid to have my vehicle towed back to the dealership where they said I needed a new transmission, but they weren’t covering it because my warranty had expired 14 days prior (on 10/2/26), during the time it was getting the first repairs done, they claimed that the two incidents had nothing to…”

“After my husband replaced the 12V battery in my 2021 Subaru Ascent Touring ($90,000, fully paid off), Apple CarPlay stopped connecting via USB entirely. Android Auto and Bluetooth continued working fine on the same phone, cable, and port, proving the defect was isolated to Subaru's CarPlay system, not my device. I spent significant time and money troubleshooting this myself: multiple cables (including two labeled "Apple certified"), a full infotainment factory reset, and a software update attempt, none of which fixed it. The issue only resolved after I purchased yet another cable at my own expense, with zero meaningful help from Subaru. When I filed a formal complaint, I received a response with an appointment confirmation left entirely blank (no retailer, date, or time), which I was told was "intentional" so I could fill in my own details, shifting all scheduling and diagnostic responsibility back onto me. When I requested compensation for hours spent troubleshooting a defect that was never mine to fix, I was told plainly that no compensation exists. Shortly after, my key fob began requiring near-direct contact with the door and push-start button to register,…”

“I purchased a new 2021 Subaru Ascent in XXX. In XXX, at about 36,000 miles, I discovered water leaking into the cabin through the panoramic moonroof during rain and brought it to Lynnes Subaru ([XXX]) immediately. Through repeat visits and recurrences, Lynnes failed to diagnose it, blaming clogged drains. In fall 2025 they identified it, with help from a Subaru corporate regional engineer, and performed a moonroof replacement. Because I acted quickly EACH TIME water entered, there was no odor or upholstery damage at that time. Water intrusion continued in areas not visible inside the cabin (seatbelt recess). [XXX] and SOA knew right away water was still entering the vehicle. SOA told me to work with [XXX], and [XXX] had me wait for a loaner before re-examining it, because the water was not in the main cabin, headliner, etc. For over two months they set no start date, then stopped contacting me altogether. When warm weather arrived in spring 2026, a strong mold and mildew odor developed. I brought the vehicle in, loaner or not. [XXX] cleaned the drains and returned it in under two hours with the odor and mold unchanged. I was shocked they would allow, let alone…”