Is a 2.4‑Liter Engine a Good Engine?

Often yes—but it depends on the specific design and who built it. A 2.4‑liter engine is simply a measure of displacement, not quality. Many 2.4L fours deliver a strong balance of everyday performance, fuel economy, and longevity, while a few well-known families have had reliability issues. This article explains where 2.4L engines shine, which versions have the best track records, what to watch for if you’re buying used, and how a 2.4L compares with common alternatives.

What “2.4 liters” really means

“2.4 liters” describes total cylinder displacement, not power, economy, or durability. Most 2.4L engines are inline‑four designs. They can be naturally aspirated (simpler, typically 160–190 hp) or turbocharged (more complex, often 220–300+ hp). How good a 2.4L is depends on engineering choices (fuel injection type, materials, timing system), the automaker’s reliability record, and maintenance.

Where 2.4L engines excel

Across many brands, 2.4L engines are popular because they hit a practical middle ground for midsize sedans, compact/midsize SUVs, and light trucks. The following points summarize common strengths owners value.

• Balanced power and economy: Adequate torque for daily driving, commuting, and light towing without V6 fuel costs.
• Packaging and weight: Inline‑four layout keeps vehicle weight and nose mass down, improving handling and efficiency.
• Parts availability: Widespread use means good parts supply and technician familiarity, keeping repair costs reasonable.
• Durability potential: Many proven 2.4L families routinely exceed 200,000 miles with regular maintenance.
• Modern tech options: Dual injection (port + direct), turbocharging, and variable valve timing broaden the performance envelope.

These advantages make 2.4L engines a sensible default for shoppers who want a do‑everything powertrain without the complexity or expense of larger engines.

Potential drawbacks and misconceptions

Not every 2.4L engine is equal. Design choices and brand history matter. Here are caveats to keep in mind.

• Brand-specific issues: Some 2.4L families have known problems (oil consumption, timing chain wear, bearing failures).
• Direct injection deposits: DI-only designs can accumulate intake valve carbon without periodic cleaning; dual-injection helps.
• Turbo complexity: Turbo 2.4Ls offer strong torque but demand strict oil quality and service intervals.
• Noise and vibration: Four‑cylinders can be coarser than V6 engines, especially under heavy load.
• “Displacement = quality” myth: Displacement doesn’t predict reliability; the specific engine family does.

Understanding the exact engine code and its reputation is more important than focusing on displacement alone.

Reliability snapshot by notable 2.4L families

Honda 2.4L “K24” (various K24A/K24Z; early 2000s–mid‑2010s in many Accords/CR‑Vs)

Widely regarded as one of the more durable naturally aspirated fours when maintained. Chain-driven cams, robust bottom end, and strong parts support. Watch for age-related issues (VTC actuator rattle at start‑up on some variants, rear main seal seepage, and PCV system service). Many examples surpass high mileage with routine oil changes.

Toyota 2.4L

Two major eras: the older 2AZ‑FE (2000s) and the modern T24A‑FTS turbo (mid‑2020s). The 2AZ‑FE delivered solid service overall but had isolated, generation-specific concerns (e.g., head‑bolt thread issues on some early‑mid 2000s applications and oil consumption on certain years). The newer T24A‑FTS turbo is widely used (Highlander, Tacoma, Lexus NX 350, among others) and pairs strong low‑rpm torque with dual injection to mitigate carbon buildup; observe oil quality and scheduled maintenance for best results.

Subaru 2.4L “FA24” (Ascent, Outback/Legacy XT, WRX)

Generally well-regarded for smooth torque and improved thermal efficiency. Direct injection and a timing chain reduce service complexity versus older belt-driven designs. Turbo variants may recommend or require premium fuel for rated performance. As with any DI or turbo engine, consistent oil changes and high-quality fuel are key, and some owners elect periodic intake cleanings over long terms.

GM 2.4L “Ecotec” (found in Equinox/Terrain, Malibu, etc., late 2000s–mid‑2010s)

Mixed record. Many owners report long life with careful maintenance, but the family is known for timing chain wear/stretch and oil consumption in certain years, often tied to piston ring and PCV concerns. A thorough pre‑purchase inspection and service history check are important for used purchases.

Hyundai/Kia 2.4L “Theta II” (GDI/MPI, late 2000s–late 2010s)

Produced in large volumes and subject to multiple recalls and warranty extensions in various applications due to bearing wear and, in some cases, engine failure risks. Many vehicles were repaired or received updated engines/ECUs. Confirm recall completion, software updates, and oil‑change history, and consider an oil analysis for peace of mind.

Chrysler/Fiat 2.4L “Tigershark” (MultiAir, early 2010s–late 2010s)

Praised for smoothness and efficiency when new but widely reported for higher‑than‑expected oil consumption in some models/years. Software updates and extended coverage were provided in several cases. Regularly check oil level and verify any service campaigns or TSBs were addressed.

Performance and economy expectations

Output and efficiency vary by tuning and vehicle weight, but these ranges are typical.

• Naturally aspirated 2.4L: roughly 160–190 hp, 160–180 lb‑ft; combined economy often mid‑20s mpg in crossovers/sedans.
• Turbocharged 2.4L: roughly 228–300+ hp, 250–330+ lb‑ft; strong low‑rpm torque; combined economy commonly low‑to‑mid‑20s mpg in SUVs.
• Towing: many 2.4L-equipped crossovers are rated 1,500–3,500 lb, depending on cooling and gearing.
• Fuel: some turbo 2.4Ls recommend premium for peak output; naturally aspirated versions usually run on regular.

Real‑world results depend heavily on driving style, load, and transmission pairing (traditional automatic, CVT, or dual‑clutch).

How to evaluate a 2.4L engine when buying used

Because the “2.4L” label spans many unrelated designs, a careful check is essential. Use this checklist to reduce risk.

1. Identify the exact engine code and research known issues for that year/model.
2. Confirm recalls and service campaigns are completed; review TSBs relevant to the engine.
3. Examine maintenance records for oil changes at proper intervals and correct viscosity/spec (e.g., API SP for LSPI protection in turbos).
4. Check for oil consumption: review dipstick level, look for blue smoke on start‑up/overrun, and ask about top‑off frequency.
5. Listen on cold start for timing chain rattle or abnormal valvetrain/DI tick; scan for misfires and stored codes.
6. Inspect PCV system, intake tract, and evidence of intake valve cleaning on DI engines.
7. Assess cooling system condition; overheating history can doom aluminum heads/blocks.
8. Evaluate transmission behavior; some drivability complaints blamed on engines are transmission or software related.

Completing these steps narrows uncertainty and helps distinguish a well‑kept example from a problem child.

Alternatives to consider

Depending on priorities, neighboring engine types may suit you better. Here are common alternatives and their trade‑offs.

• 2.0L turbo four: Similar or better torque with improved efficiency in lighter vehicles; may be more sensitive to maintenance.
• 3.5L (approx.) V6: Smoother and stronger under load and towing; higher fuel and maintenance costs and sometimes tighter service access.
• Hybrid powertrains: Superior city economy and low‑end torque; higher upfront cost and different maintenance profile.

If you carry heavy loads, tow frequently, or want maximum refinement, a V6 or hybrid might be the better fit. For balanced daily use, a well‑engineered 2.4L remains compelling.

Bottom line

“Is a 2.4L engine good?” It can be excellent—if it’s one of the stronger families and it’s been maintained. Engines like Honda’s K24, Toyota’s newer 2.4‑liter turbo, and Subaru’s FA24 have solid reputations when cared for. Others (certain GM Ecotec, Hyundai/Kia Theta II, and Chrysler Tigershark variants) warrant extra diligence due to documented issues. Focus on the exact engine, its service history, and independent inspection—displacement alone won’t tell you what you need to know.

Summary

A 2.4‑liter engine is not inherently good or bad. It’s a versatile size used across many vehicles, with standout examples known for longevity and a few families known for specific problems. Verify the engine code, check recalls and maintenance records, and match the powertrain to your needs. Do that, and a 2.4L can be a smart, reliable choice for everyday driving.

What is the most reliable 4-cylinder engine?

There is no single “most reliable” 4-cylinder engine, but consistently highly-regarded engines include Honda’s K-Series (K20, K24), known for its bulletproof design and high longevity, and Toyota’s 22RE (2.4L) and Dynamic Force (2.0L, 2.5L) engines, noted for their durability and straightforward design. The older Volvo B230 (“Red Block”) is another legendary option for its exceptional dependability, while the Honda K20C1 stands out as a highly reliable turbocharged 4-cylinder.
 
Highly Reliable 4-Cylinder Engines 

• Honda K-Series (K20, K24): Opens in new tabThese naturally aspirated engines are celebrated for their lightweight aluminum construction, integrated bed plate for rigidity, and timing chain for durability. 
• Toyota 22RE: Opens in new tabA 2.4-liter engine with a cast-iron block and aluminum heads, featuring a durable timing chain for excellent reliability and smooth operation. 
• Toyota Dynamic Force (2.0L, 2.5L): Opens in new tabModern, naturally aspirated engines found in models like the Corolla and RAV4, these are known for their reliability and minimal issues with proper maintenance. 
• Volvo B230 “Red Block”: Opens in new tabA robust and timeless engine from the 1980s and 90s, designed for exceptional long-term durability with basic maintenance. 
• Honda K20C1: Opens in new tabA turbocharged version of the K-Series, this engine combines high-performance thrills with the same dependable reliability Honda is known for. 

Key Factors for Reliability

• Timing Chain vs. Belt: Engines with timing chains are generally more reliable because the chain is designed to last the life of the engine, unlike rubber timing belts that require periodic replacement. 
• Robust Construction: A solid, well-engineered engine block, whether cast-iron or advanced aluminum alloys, contributes significantly to a long lifespan. 
• Proven Design: Engines with a long history of use, like the Honda K-Series and Toyota 22RE, have had time to work out any potential issues and are well-sorted. 

How good is a 2.4 liter engine?

A 2.4-liter engine can be “good” as it offers a reliable balance of power and efficiency, but its quality depends on the specific engine design and whether it’s turbocharged. Many 2.4L engines, like some from Toyota and Subaru, are known for dependable performance and durability. However, modern turbocharged 2.4L engines, while powerful, are more complex and may have more potential points of failure compared to naturally aspirated engines.
 
Factors that make a 2.4L engine good:

• Reliability: Many 2.4L engines are known for being long-lasting and dependable with proper maintenance. 
• Efficiency: A 2.4L engine offers a good balance between power and fuel economy, making it a suitable choice for many drivers. 
• Smoothness: The Subaru 2.4L engine is known for being smooth, while the Toyota 2.4L Turbo is also described as smooth and offering good acceleration. 

Factors that can impact performance:

• Turbocharging: A turbocharged 2.4L engine offers significant power and torque, especially at lower RPMs, which is ideal for heavy vehicles. However, turbocharged engines are more complex, increasing potential points of failure. 
• Naturally Aspirated vs. Turbocharged: Older, naturally aspirated 2.4L engines, such as those in some Chrysler Sebrings, might have simpler designs and fewer maintenance concerns than modern turbocharged counterparts. 
• Vehicle Application: A 2.4L engine can be excellent in a car for daily driving, but might feel underpowered in larger vehicles, particularly under heavy loads or at high altitudes. 

Potential Concerns:

• Complexity: Turbocharged 2.4L engines have more intricate parts, like high-pressure fuel systems and water/oil-cooled turbochargers, which can add to complexity and potential issues. 
• Maintenance: While many 2.4L engines are easy to work on, some modern designs with complex fueling systems can make certain maintenance tasks more challenging, according to YouTube reviewers of the Toyota Tacoma 2.4L. 

How long will a 2.4 L engine last?

Subaru’s 2.4-liter turbocharged engine has been known to last over 150,000 miles with routine maintenance. All of the issues mentioned here can be avoided entirely with proper care.

Is the i force 2.4 l 4 cyl turbo engine a good engine?

The i-FORCE 2.4L 4-cylinder turbo engine in the fourth-generation Toyota Tacoma is praised for its significant torque increase, low-end power delivery, smooth 8-speed transmission, and improved fuel efficiency compared to the previous V6. While early reviews highlight strong performance for daily driving and some low-end turbo lag, the long-term reliability is still an unknown, as with any new engine design. 
Key Aspects & Performance

• Torque Focus: The engine delivers impressive low-end torque, reaching peak power at a low 1,700 RPM, which is beneficial for city driving, trailer pulling, and off-road performance. 
• Power Output: The standard engine produces 278 horsepower and 317 lb-ft of torque, a notable increase from the prior generation. 
• Smooth Drivability: The integration with the Aisin 8-speed automatic transmission provides smooth and responsive shifting, contributing to a refined driving experience. 
• Fuel Efficiency: The engine is designed for improved fuel economy and reduced emissions, with features like a long stroke, thin piston rings, variable displacement oil pump, and low-viscosity oil. 
• Performance Tuning: The tuning prioritizes low-end power, which makes the acceleration feel lively in everyday situations but can make full-throttle acceleration less immediate compared to winding out the previous V6. 

Reliability & Longevity 

• New Technology: While the engine uses a combination of direct and port injection (D4ST), similar to other Toyota applications, its long-term reliability compared to the older V6 is a primary concern for buyers.
• Engineering Focus: Toyota’s focus on fuel efficiency, reduced emissions, and a lightweight design may have led to trade-offs in terms of durability, but the engine is used in other Toyota and Lexus models, which suggests a focus on overall reliability.
• Maintenance: The direct injection system’s components, particularly the high-pressure fuel injectors, may complicate future maintenance, such as valve cover removal.

Driving Experience

• Quiet and Smooth: The engine is surprisingly quiet and smooth for a four-cylinder, offering a more refined experience than previous models. 
• Responsive Acceleration: Despite a slight potential for turbo lag, the engine offers quick throttle response and feels more agile and lively, especially in the mid-range and at lower speeds.