2025 Subaru Forester

Engine is misfiring, causing in ability to accelerate properly and loads multiple error codes. Upon taking it to the dealership for services, we were told that there is a significant amount of carbon built-up inside the engine. The car has only 6,800 miles on it. The dealership stated that it is an issue that Subaru engineering is aware of but has yet to figure a way to resolve it. The dealership informed us that hybrid engines have had severe carbon build-up on the in-take valves that causes misfiring, loss of power, bucking and stumbling of the engine. Apparently this has been reported all over different on-line forums. The dealer informed us that they would need to order a valve cleaning kit as referenced un service bulletin 02-193-24 and the engine would require walnut blasting. The vehicle was dropped off for service on 7/22 the work was completed, but upon restarting the engine more codes fired up and they stated that the Electronic Communication Module failed and it would now require an escalation to the Subaru Engineers called TechLine, "they now say that the ECM now needs replacement, still misfiring and has become a more complicated issue"

My new vehicle, with under 4,000 miles, has already suffered multiple chewed wires due to rodents attracted to the soy-based wire coatings used by the manufacturer. This is not a minor inconvenience — it is a serious safety issue. Damaged wiring can cause loss of power steering mid-drive, ABS and braking system malfunctions, airbag deployment failures, engine stalling on highways, and electrical fires — any of which can result in injury or death. The manufacturer knows soy-based coatings attract rodents, the consequences are safety-critical, and proven mitigations exist (capsaicin-infused coatings, hardened sheathing, metal conduit) yet are not implemented from the factory. If vehicles are engineered to withstand foreseeable environmental hazards like water intrusion, heat, and road debris, there is no justification for leaving critical wiring defenseless against a well-documented and predictable threat. A material choice known to invite damage, paired with insufficient physical barriers, is not an external cause — it is a design flaw.

Exhaust gas smell from the engine compartment when parked after driving. Garage smells like exhaust gases when left in enclosed garage - ongoing problem. Smell dissipates overnight. It has been inspected by Subaru dealers in Albuquerque and Santa Fe New Mexico. They report no error codes and so no problem. Have not had this issue on any other vehicle we've ever owned. There are no warning lamps or messages.