2026 Subaru Trailseeker problems

“Since owning the vehicle at the end of April 2026, there has been a phantom drain on the accessory system that causes the 12-volt battery to drop below the minimum operating voltage, requiring a jump start in order to get the vehicle to operate. The first event happened within weeks of owning the vehicle and after leaving the car turned off, including all lights, and doors locked for around 72 hours. Even after a jump start and getting the 12-volt battery charged up a bit, the drain caused the battery to require a jump-start soon after. There was enough voltage in the 12-volt battery to unlock the vehicle via the key fob and attempt to get the vehicle into READY mode, before cutting out. The dealer ran tests on the 12-volt battery to find no issues. The second event happened a few weeks after the first event, but the drain had depleted the battery enough that the driver-side door had to be unlocked using the physical key. A jump start as required. The third event, in which the vehicle had been off for less than 24 hours, had the 12-volt battery was badly depleted requiring a jump start. Immediately drove the vehicle to dealer to have them investigate. They had…”

“Door seals allow significant dust infiltration.”

“I went to start my 2026 Trailseeker and the 12 volt battery was dead. I contacted Subaru Roadside Assistance to jump the vehicle. After they jump started the vehicle I received the following warnings on the dash.."Brake Override Malfunction..Visit Your Dealer".."Braking Power Low..Visit Your Dealer." "Braking Power Low Stop in a Safe Place See Owners Manual." The car was un-drivable as I was unable to release the brake. I disconnected the battery cables and those warnings went away but the EV malfunction light remains on. The car was towed to the dealership and in their possession, the battery was dead again and had to be jumped by them. They said they found nothing wrong with anything. I requested a new battery and they said it would not be approved by Subaru as they found nothing wrong with the battery. I took the car home and connected a battery monitor and found..if I have the Subaru Connect app connected to the car, it drains the battery overnight. If I disconnect the battery, the battery does not drain. I did get a bad battery notification from my battery charger as I charged the battery because I would not be driving it for a couple of days. Subaru was…”

“The day before that all these issues started popping up my battery was completely dead, and I had to jumpstart the 12 V battery the next day while I was driving down the highway I started getting all these error messages and also the video from the Ford camera started glitching with my navigation.”

“2026 Subaru Trailseeker, purchased new May 19, 2026. The 12V auxiliary battery failed completely after 3 days parked on June 17, 2026. Traction battery was at 65% charge at time of failure. All vehicle systems were unresponsive. Couldn't open doors, do anything. When the 12V drains fully on this platform, the wheels lock and the vehicle cannot be moved by a standard tow truck, creating a stranding risk in any location where jump-starting is not possible. Since the incident, I have installed a Bluetooth battery monitor. Data collected June 22, 2026 shows consistent parasitic drain throughout the day, with voltage declining from ~12.2V at rest and recovering only briefly when the DC-DC converter cycles (~14V spikes). The battery does not hold charge between cycles. No warning lamps appeared before or during the failure. This issue is documented across the shared Toyota/Subaru EV platform. The 2023-2025 Solterra and bZ4X are currently subject to class action litigation (Wade v. Toyota Motor North America, E.D. Cal., filed June 2025) alleging defective 12V charging systems. Warranty battery replacements do not resolve the problem because the parasitic drain…”