What goes wrong with Subaru Legacy?
Subaru Legacy problems cluster around a few familiar points: older 2.5-liter engines are prone to head-gasket and oil-consumption concerns, newer generations rely on CVT transmissions that can falter, and electrical/safety-system glitches have shown up in some model years. The exact issues depend on the generation and how well the car has been maintained.
Below is a breakdown of the most commonly reported faults, how they typically present, and what buyers or owners can do to mitigate risk. The discussion covers powertrain, transmission/drive systems, and electrical/safety-related concerns, with guidance on shopping for a used Legacy and staying ahead of potential failures.
Engine and powertrain problems
The following issues are frequently cited by Legacy owners across generations. They vary in severity and frequency by model year, but they are widely considered the most consequential powertrain concerns to watch for.
- Head-gasket and overheating risks on certain 2.5-liter EJ-series engines, especially in older Legacy models
- Oil consumption and burning in mid-2000s 2.5L units, which can lead to low oil levels if not monitored regularly
- Valve-cover or cam-seal oil leaks that can create oil spots and, in some cases, misfire symptoms
- Timing belt-driven configurations in older generations and the associated risk of belt failure if maintenance intervals are missed
- CVT-related concerns in newer Legacy models (Lineartronic), including shuddering, hesitation, and, in some cases, premature transmission wear
Concluding: Engine-related faults often stem from age and maintenance history. Regular oil checks, cooling-system maintenance, timely belt replacements where applicable, and attentive CVT service can reduce the likelihood and impact of these problems.
Transmission and drive-system specifics
In-depth notes on how the transmission and AWD components tend to behave across generations help buyers gauge risk. The Legacy has transitioned from traditional automatics to CVTs in later years, and each setup carries its own failure profile.
Electrical, safety, and interior concerns
Electrical gremlins and safety-system quirks appear with varying frequency depending on year and trim. The following points summarize the most commonly reported electrical or system-related faults.
- ABS/traction-control warning lights caused by sensor or module failures
- Password-protected infotainment glitches, Bluetooth pairing issues, or screen freezes in some trims
- Infotainment system failures or radio/nav malfunctions, which can be symptomatic of software updates or component wear
- Airbag recalls and related safety-system components (including Takata inflators in older vehicles) that require dealer intervention
- Dashboard gauge erratic behavior or warning-light chatter due to sensor faults or wiring harness concerns
Concluding: Electrical systems tend to be highly model-year specific. Verifying that all safety recalls are complete, and inspecting service records for sensor or module replacements, can save headaches down the line.
Maintenance, recalls, and buying tips
When evaluating a used Legacy, prioritize service history, confirmation of recalls addressed, and evidence of CVT or transmission service where applicable. A pre-purchase inspection should include engine compression checks, a road test for transmission behavior, and a look for oil leaks or coolant issues.
Practical steps help buyers reduce risk and owners extend the life of a Legacy. Prioritize vehicles with comprehensive service records, verify climate-control and electrical components work, and budget for routine maintenance that protects both the engine and the transmission.
Key actions include confirming regular coolant and oil changes, ensuring CVT fluid changes are performed at or within the recommended intervals (for CVT-equipped cars), and scheduling a thorough inspection of the head gasket, timing components, and sealing surfaces before purchase.
Summary
The Subaru Legacy remains a practical all-wheel-drive option, but its reliability profile is highly dependent on year and maintenance. Older 2.5L engines bring head-gasket and oil-consumption risks, while newer models carry CVT-related transmission concerns. Electrical and safety-system issues can appear, especially if recalls were not completed. For buyers, the best approach is to review complete service histories, confirm recall work, and seek a model with documented maintenance, especially for the powertrain and CVT community. With careful selection and proactive upkeep, a Legacy can deliver reliable year-round performance.
