2024 Subaru Outback: Engine complaints
Owner-reported issue (NHTSA complaints, not a recall)
Symptoms
NHTSA has 6 owner complaints for the 2024 Subaru Outback that list the engine component. Complaints are individual owner reports, not verified defects.
Examples:
- NHTSA complaint ODI #11753053 (filed 07/27/2026): “Vehicle was not accelerating properly, so took to the dealership (mike shaw subaru) to have work completed. technicians indicated that the engine valves (shim valves) all had to be replaced and other work needed to be performed such as: intake manifold, shim valves, gasket throt chamber. after deale…”
- NHTSA complaint ODI #11729500 (filed 04/06/2026): “My 2024 subaru outback has twice become inoperable while stopped at a traffic signal. in both incidents, the engine was off while stopped, but the vehicle remained powered on and would not restart. the vehicle also would not properly power down. the car could not be safely driven or moved and requi…”
- NHTSA complaint ODI #11724586 (filed 03/16/2026): “Was doing 55-60 mph in left lane of highway. suddenly and without warning the car is decelerating, cannot accelerate any more, all warning lights suddenly flashing on dashboard. i was able to get over to the far right emergency lane, turn car off and put on hazards and started calling subaru roadsid…”
Likely causes
These complaints do not establish a single root cause; read the examples above and get a diagnosis.
Fix, in plain English
No single fix is established by these reports. Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer about technical service bulletins (TSBs) or extended warranty coverage, then have the system diagnosed.
DIY difficulty: Pro
Internal engine work (lifters, oil consumption, fuel dilution diagnosis) requires engine teardown or dealer software/tests. (Our assessment.)
Cost
No sourced cost range for this issue. Get a written quote after diagnosis.
Typical parts (search links, no affiliate codes)
AutoZone · O'Reilly · Advance · RockAuto
Sources
Page last updated .