How long does a Subaru Impreza engine last?
A Subaru Impreza engine can reasonably be expected to last around 200,000 miles or more with proper maintenance; many owners reach 250,000–300,000 miles, and some exceed 400,000 with diligent care.
Across generations, engine longevity depends on the engine family, maintenance history, climate, and driving style. The Impreza has used two main boxer engine families over its history, with older EJ-series engines and newer FA/FB engines. The rest of this article explains typical lifespans, model-year differences, and practical steps to maximize engine life.
Engine families and longevity
Over the years, the Impreza uses different boxer engine families. The older engines (EJ-series) are well-known, and the newer generations (FA/FB) improved reliability and efficiency; both can last a long time with proper care.
- Older EJ-series engines (common in 1990s–2000s Imprezas): with regular maintenance, many reach 200,000 miles or more; some reach 250,000–300,000 miles, though head gasket and oil consumption can become a concern as mileage climbs.
- Newer FA/FB-series engines (used from the 2010s onward): designed for durability and efficiency, with many examples lasting 200,000–350,000 miles; proper maintenance can push results beyond 400,000 miles in some cases.
In practical terms, the engine’s life is determined more by upkeep and usage than by model year alone. A well-maintained Impreza with routine service can outlive its body and drivetrain components.
Maintenance practices to maximize life
Adopting disciplined maintenance routines is the best way to maximize engine longevity. The following practices are widely recommended by technicians and many owners.
- Follow manufacturer oil change intervals using the recommended viscosity and synthetic-grade oil; change oil sooner if you drive in harsh conditions (short trips, cold climates, towing).
- Keep cooling system in good shape: coolant flushes on schedule, replace hoses and the radiator cap, ensure temperature gauge operates correctly to prevent overheating.
- Monitor and address head gasket issues early in older EJ engines; look for coolant loss, white exhaust, or milky oil, and seek diagnosis if suspected.
- Maintain the timing belt/chain as per service schedule (some engines use belts, others chains); replace components like water pump and tensioners if applicable.
- Check air and fuel filters, PCV system, and EGR to maintain efficiency and reduce stress on the engine.
- Drive habits matter: avoid prolonged high-speed acceleration, allow the engine to warm up before driving aggressively in cold weather, and fix any cooling system leaks promptly.
Implementing these practices typically yields the best odds of reaching high mileages with the original engine intact.
Common issues to watch for
Some issues are more common on older EJ engines, while newer FA/FB engines show different failure points. Keeping aware of these helps with early intervention.
- Head gasket wear and minor oil consumption on older EJ-series engines; early detection is key to avoiding catastrophic failure.
- Cooling system failures (radiator, water pump) that can lead to overheating if ignored.
- Oil leaks around valve covers and gaskets, which can be addressed with timely maintenance.
Regular proactive maintenance reduces the risk and helps the engine achieve its expected lifespan.
Bottom line and expectations by generation
For most Impreza owners, the goal is to achieve reliable service well past the 200,000-mile mark. With modern FA/FB engines, many drivers report 200,000–350,000 miles as common, and some reach or exceed 400,000 miles with meticulous care. The older EJ engines can also reach high mileages, but their maintenance history—especially head gasket reliability—plays a larger role in overall longevity.
Summary
In summary, the Subaru Impreza can be a long-lasting vehicle when its engine is well cared for. Expect roughly 200,000 miles as a baseline, with 250,000–300,000 being common, and potential for 400,000 miles or more under ideal maintenance and driving conditions. The key is consistent service, attention to lubrication and cooling systems, and prompt repair of issues as they arise.
