How reliable is the Subaru 2.4 engine?
Overall, the Subaru 2.4-liter engine is generally reliable when it is properly maintained. Like most modern turbocharged boxes, its longevity depends heavily on regular service, quality oil, and attentive care of the turbo and cooling systems. Some early or certain model-year variants have shown issues such as oil consumption that buyers should monitor, but many owners report solid, long-term performance with routine maintenance.
To understand reliability in context, it helps to know what the 2.4-liter engine is, where it’s used in Subaru’s lineup, and what owners and technicians say about long-term durability. The 2.4-liter family (the FA24 engine line) is a turbocharged boxer four that delivers strong midrange torque and modern efficiency. It powers several contemporary Subarus in performance and utility segments, and its durability hinges on upkeep, cooling, and turbo-system health as much as any other modern turbo engine.
What is the 2.4-liter engine family?
The 2.4-liter engines in Subaru’s current lineup are part of the FA24 family. They are turbocharged, horizontally opposed (boxer) four-cylinders that use direct fuel injection to deliver roughly 260–271 horsepower and a broad torque curve. This combination makes the 2.4L suitable for both high-performance models and family crossovers. In practice, the engine design emphasizes efficiency and performance, but it also brings turbocharged maintenance considerations and the need for consistent, quality service to preserve reliability over time.
Key reliability considerations
Several factors influence reliability for this engine family, including oil management, turbo health, cooling systems, and maintenance discipline. Here are the main considerations owners and technicians monitor:
- Oil consumption and proper oil level monitoring appear in several owner reports for some early FA24-powered vehicles.
- Turbocharger health and associated piping (intercooler, oil lines, coolant lines) require attention to avoid leaks or turbo-related failures.
- Direct injection can lead to carbon buildup on intake valves if maintenance intervals are extended or fuel quality is inconsistent; periodic cleaning or maintenance may be recommended in some cases.
- Cooling system integrity matters for turbocharged engines, where heat management supports longevity of turbines and seals.
In practice, staying current with Subaru’s recommended maintenance schedule, using quality synthetic oil, and addressing any unusual oil consumption or leaks promptly can help maximize the engine’s longevity and performance.
Reliability by model and usage
The 2.4-liter engine powers a range of contemporary Subarus, including the WRX and several high-torque crossover variants. Power output varies by model and tuning, but most applications place the engine in the 260–271 horsepower range with torque typically in the 258–277 lb-ft neighborhood. Owners tend to report strong reliability over the long haul when service is consistent and components such as the turbo, intercooler, and oil system are well-maintained.
Model-year and trim differences matter for reliability signals. Early adopters of a new turbo engine can encounter teething issues, while later revisions typically benefit from refinements and updated components. Prospective buyers or current owners should consult a dealer or a trusted technician about any model-year specific advisories, warranty extensions, or service campaigns related to oil consumption or turbo-related components.
What to watch for if you’re buying used
When shopping for a used Subaru with the 2.4-liter engine, it’s wise to perform targeted checks that reflect the engine’s turbocharged design and maintenance needs. A careful pre-purchase review can flag issues early and inform negotiation.
- Ask for full maintenance records, especially oil-change history and any rapid oil consumption notes.
- Inspect for oil leaks around the turbo oil lines, intercooler, and engine valley; signs of seepage can indicate gasket or line wear.
- Check coolant levels and look for any signs of coolant leaks near the turbocharger area or hoses, since cooling system integrity is important for turbo longevity.
- Listen for unusual exhaust notes or turbo whine at idle or under acceleration, which can signal turbo or intake issues.
- Have the vehicle scanned for fault codes related to fuel, ignition, or turbo control; some codes can point to carbon buildup or injector concerns common on direct-injected engines.
With diligent inspection and a clear maintenance history, a used 2.4-liter Subaru can offer reliable service for many miles, though buyers should be prepared for potentially higher maintenance costs typical of turbocharged engines.
Bottom line for buyers and owners
For most drivers, the Subaru 2.4 engine delivers rewarding performance and solid reliability when kept up with routine maintenance. Its turbocharged design means owners should stay attentive to oil health, cooling system integrity, and any signs of turbo wear. Subarus with verified, consistent service records and a history of timely repairs tend to age well, often reaching high mileage with proper care.
Summary
In summary, the Subaru 2.4-liter engine is a capable, modern turbo boxer that offers strong performance and good reliability when maintained properly. The main caveat is the turbocharged nature of the unit, which brings maintenance demands and the potential for oil consumption or turbo-related issues in some model years. For prospective buyers, a thorough pre-purchase check, plus adherence to Subaru’s service recommendations, will help maximize long-term durability and satisfaction.
