What is the main problem with a Subaru Impreza?
Across generations, the most consistently reported problem is head gasket failure on the EJ-series 2.5-liter engines. Other common concerns include oil consumption in some 2.5L variants and CVT transmission problems in later models.
The following overview reflects what owners, technicians, and reliability surveys have documented as the most frequent trouble spots for the Subaru Impreza as of 2024–2025. It explains which years are most affected, what to look for during inspection, and how maintenance can mitigate risk.
Common reliability concerns by generation
Below is a concise rundown of the issues most frequently cited by owners and technicians, with notes on year ranges and what to watch for.
- Head gasket failure in EJ-series 2.5L engines — symptoms include coolant loss, overheating, milky oil, or white exhaust; repairs can be costly and may involve engine work.
- Oil consumption in certain 2.5L engines — some model years exhibit higher oil burn; monitor oil level regularly and be prepared for top-offs or more involved repairs in high-mileage engines.
- CVT transmission reliability in later-model Imprezas — model years roughly 2010–2016 have reports of shudder, slipping, or failure, which can lead to expensive repairs or replacement; regular CVT fluid maintenance is advised.
- Wheel bearings and suspension wear — common at higher mileages, potentially causing noise, vibration, or alignment issues; early replacement can prevent further problems.
- Oil leaks and cooling-system wear (gaskets, seals, water pump) — age-related leaks are frequently noted and may require gasket service or component replacement during routine upkeep.
While these issues appear most often, many Imprezas remain dependable with attentive maintenance. Preventative steps include keeping the cooling system in good condition, following timing belt/chain service recommendations where applicable, and staying current with CVT maintenance for affected years.
Head gasket failures: engines and prevention
The EJ-series 2.5L engines used in many Impreza models are the most frequently cited for head gasket issues. Early signs include unexpected overheating, coolant loss, or milky oil. Preventive measures focus on maintaining proper cooling system function, using the recommended coolant, and scheduling timely inspections or head gasket service when signs appear. In some regions and years, Subaru offered extended warranty coverage for head gasket fixes on older models; verify coverage for your vehicle.
Oil consumption and the 2.5L engine
Oil consumption is a recurring complaint among certain 2.5L engines. Regularly checking oil levels between changes and addressing persistent consumption with a qualified mechanic can help identify whether the cause is valve stem seals, piston rings, or other wear. Depending on the year and warranty status, some repairs may be covered under service campaigns.
CVT reliability in later Imprezas
CVTs in 2010s Imprezas have been associated with issues such as shuddering or intermittent slipping in some cases. Following Subaru's recommended CVT maintenance schedule (including periodic fluid changes) can help, but potential buyers should budget for the possibility of CVT-related repairs in high-mileage or severe-use scenarios.
Other recurring issues and maintenance tips
Beyond engine and powertrain troubles, owners report wear-related items like wheel bearings and suspension components, which are common across compact cars at higher mileages. Routine inspections, timely replacements with certified parts, and preventive maintenance go a long way toward keeping an Impreza on the road.
Summary
The Subaru Impreza offers practicality and all-wheel-drive capability, but its most enduring reliability challenge centers on head gasket failures in the EJ-series 2.5L engines, with oil consumption and CVT performance notable in certain generations. For buyers, a careful pre-purchase inspection focusing on cooling system integrity, oil consumption, and CVT condition is essential. For current owners, proactive maintenance—especially around cooling, gasket integrity, and transmission service—can help reduce the risk of expensive repairs and extend the life of the vehicle.
