HITACHI AUTOMOTIVE SX-4071 Fuel Injection Throttle Body 1.8L 2.4L

( Brand: Hitachi Automotive ), ( Manufacturer Part Number: SX-4071 ), ( Type: Fuel Injection Throttle Body ), ( Item Weight: 2.0100 ), ( Manufacturer Warranty: 1 Year ), ( Item Width: 4.800 ), ( Item Height: 3.280 ), ( Item Length: 5.040 ), ( Ipn: C859 39-52 ), ( Placement On Vehicle: Air Fuel Delivery Fuel Injection System ), ( Compatible Year: 2012 2011 2010 2009 2008 2007 2006 2005 2004 ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Hitachi Fuel Injection Throttle Body )

Review HITACHI AUTOMOTIVE Fuel Injection Throttle Body Toyota 1.8l 2.4l Lk fits COROLLA 2004–2012

The **Hitachi SX-4071 Fuel Injection Throttle Body** is a high-performance, precision-engineered replacement part designed specifically for **2004 2012 Toyota Corolla models** equipped with **1.8L and 2.4L engines** (including the **LK series**), ensuring optimal throttle response, fuel efficiency, and long-term reliability. Crafted from durable **high-grade aluminum alloy**, this throttle body is built to withstand the demands of modern driving conditions while maintaining seamless operation under varying loads. The unit features a **smooth-bore throttle plate** with a **precision-machined shaft**, reducing friction and preventing sticking common issues in aftermarket or worn-out OEM components. Its **sealed carbon brushless throttle actuator** eliminates the need for manual throttle cable adjustments, providing consistent and responsive throttle control, whether accelerating smoothly or under aggressive driving conditions.

This throttle body incorporates **Hitachi s advanced fuel injection technology**, featuring a **high-flow throttle bore** that enhances airflow efficiency, supporting better engine breathing and improved throttle response. The **integrated throttle position sensor (TPS)** ensures accurate engine management system (EMS) feedback, helping maintain optimal fuel delivery and ignition timing for peak performance. The design also includes **reinforced gaskets and O-rings**, preventing leaks and ensuring a secure, vibration-free fit within the engine bay. Whether used for **restoration projects, performance upgrades, or routine maintenance**, the Hitachi SX-4071 delivers a **direct drop-in replacement** that exceeds OEM specifications, reducing the risk of failure and ensuring compatibility with Toyota s **EFI (Electronic Fuel Injection) systems** across the specified model range.

Built to meet **strict quality and durability standards**, this throttle body undergoes rigorous testing to guarantee **long-lasting performance** in both **street and light-duty performance applications**. Its **modular construction** allows for easy installation, requiring minimal tools and expertise, while its **universal fitment** ensures it works seamlessly with stock and aftermarket fuel injection systems. Whether replacing a worn-out OEM part or upgrading for better throttle control, the Hitachi SX-4071 is a **reliable, high-performance solution** that restores engine responsiveness and efficiency, making it an essential component for Toyota Corolla owners seeking **durability, precision, and performance**.

### **Pros and Cons of Buying a Hitachi SX-4071 Fuel Injection Throttle Body for a 2004 2012 Toyota Corolla (1.8L/2.4L, LK Engine)**

1. **Compatibility** The Hitachi SX-4071 is a direct replacement for the stock throttle body in the Toyota Corolla (1.8L/2.4L, LK engine) from 2004 2012. It fits seamlessly without modifications, ensuring an easy installation process.

2. **Improved Performance** The SX-4071 features a larger bore and optimized airflow design, which can enhance throttle response, reduce hesitation, and improve overall engine efficiency. This is particularly beneficial for engines that may have developed carbon buildup or throttle response issues over time.

3. **Durability** Hitachi is a well-known brand in automotive aftermarket parts, known for producing high-quality throttle bodies that are resistant to wear and tear. The SX-4071 is made from durable materials, reducing the risk of premature failure.

4. **Compatibility with Modern Systems** The throttle body includes a built-in throttle position sensor (TPS) that is compatible with the vehicle s electronic control module (ECM). This ensures that the engine management system will recognize it without requiring additional calibration or programming.

5. **Cost-Effective Upgrade** Compared to full engine rebuilds or performance tuning, replacing the throttle body is a relatively inexpensive upgrade that can yield noticeable improvements in drivability and power output.

6. **Easy Installation** The SX-4071 is designed for straightforward installation, requiring only basic tools. No major modifications to wiring or mounting are typically needed, making it a DIY-friendly upgrade.

7. **Potential Fuel Efficiency Gains** By improving airflow and reducing restrictions, the throttle body can help the engine run more efficiently, potentially leading to slight improvements in fuel economy, especially if the original throttle body was clogged or worn.

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1. **Mixed Reviews on Performance Gains** While some users report noticeable improvements in throttle response and power, others particularly those with well-maintained engines may not see significant changes. Expectations should be realistic; this is not a high-performance upgrade but rather a maintenance or restoration part.

2. **Potential Learning Curve for Installation** Although the installation is generally straightforward, those unfamiliar with engine modifications may encounter challenges, such as ensuring proper wiring of the TPS or securing the throttle body correctly. Consulting a manual or video guide is advisable.

3. **No Guarantee of Fixing Underlying Issues** If the engine has other problems (e.g., failing sensors, vacuum leaks, or a clogged intake), replacing the throttle body alone may not resolve performance issues. A thorough diagnostic check is recommended before installation.

4. **Quality Variability** While Hitachi is a reputable brand, counterfeit or low-quality replicas may exist in the aftermarket. Purchasing from a trusted seller (e.g., Amazon, RockAuto, or a local auto parts store with return policies) helps mitigate this risk.

5. **Limited Longevity Compared to Stock** While durable, the SX-4071 may not last indefinitely, especially if the vehicle is driven aggressively or in harsh conditions. Regular maintenance (e.g., cleaning the throttle body periodically) can extend its lifespan.

6. **Possible Check Engine Light (CEL) Trigger** If the new throttle body is not installed correctly or if the TPS is not calibrated properly, the vehicle s ECM may log a code related to throttle position. This is usually fixable with a scan tool and proper recalibration.

7. **Not a Full Performance Solution** For serious power gains, additional modifications (e.g., intake, exhaust, ECU tuning) would be required. The SX-4071 alone is a modest upgrade and should not be expected to drastically increase horsepower or torque.

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The Hitachi SX-4071 throttle body is a **solid, cost-effective replacement** for the stock unit in a 2004 2012 Toyota Corolla (1.8L/2.4L, LK engine). It offers **better airflow, improved throttle response, and durability**, making it a worthwhile upgrade for those experiencing hesitation, rough idling, or degraded performance. However, it is **not a high-performance part** and should not be expected to deliver significant power gains without additional modifications.

If your engine is otherwise healthy and the primary issue is a worn or carbon-laden throttle body, this upgrade is a **practical and affordable solution**. For engines with deeper problems, pairing this with a diagnostic check and addressing other potential issues (e.g., sensors, intake, or fuel system) will yield the best results.

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- Your Corolla is experiencing throttle response issues, hesitation, or rough idling.

- You want a simple, direct replacement that improves airflow without major modifications.

- You are comfortable with a basic installation or have access to guidance.

- You purchase it from a reputable seller to avoid counterfeit parts.

- You suspect other underlying issues (e.g., vacuum leaks, failing sensors, or a clogged intake).

- You want more significant performance gains, in which case pairing it with an intake, exhaust, or ECU tune would be beneficial.

- You are unsure about installation consult a mechanic or perform thorough research before proceeding.

**Final Verdict:** The Hitachi SX-4071 is a **reliable and practical upgrade** for restoring or enhancing throttle response in your Toyota Corolla, provided expectations are realistic and other engine components are in good condition.

Details:

Hitachi Fuel Injection Throttle Body for 2004 - 2012 Toyota Corolla 1.8L 2.4L lk: Status: In Stock.

part #: sx4071 prices

• $29.70-$389.26

specifications carfuelinjector:

• for models: Corolla
• for makes: Toyota
• for years: 2004-2012
• brand: Hitachi Automotive
• mpn: Sx-4071
• type: Fuel Injection Throttle Body
• item weight: 2.0100
• manufacturer warranty: 1 Year
• item width: 4.800
• item height: 3.280
• item length: 5.040
• ipn: C859 39-52
• placement on vehicle: Air Fuel Delivery Fuel Injection System
• compatible year: 2012 2011 2010 2009 2008 2007 2006 2005 2004
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Hitachi Fuel Injection Throttle Body

returns carfuelinjector:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

offer carfuelinjector:

• options: Ship-to-home
• started: May 3, 2026
• availability: In Stock
• sold: 0
• quantity: 2

payments carfuelinjector:

• credit card: Mastercard
• other
• wallet: Apple-pay

seller carfuelinjector:

• rating: 99.6%
• city: Indianapolis, Indiana
• # reviews: 652676

general carfuelinjector:

• condition: New
• Air Fuel Delivery > Fuel Injection Parts > Fuel Injectors

shipping carfuelinjector:

• transit: 3-5 Days
• cost: $0.00
• type: Fixed
• service: Standard, Expedited
• class: Standard, Expedited

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