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  3. HITACHI AUTOMOTIVE SX-2942

HITACHI AUTOMOTIVE SX-2942 Fuel Injection Throttle Body Air 2.0L L4 Bs

fits model: S3. make: Audi. year: 2015–2023.

Sx-2942 Hitachi Automotive Fuel Injection Throttle Body For 2015-2023 Audi S3 2.0l L4 Air Bs

( Brand: Hitachi Automotive ), ( Manufacturer Part Number: SX-2942 ), ( Type: Fuel Injection Throttle Body ), ( Item Weight: 2.9000 ), ( Manufacturer Warranty: 1 Year ), ( Item Width: 8.600 ), ( Item Height: 4.380 ), ( Item Length: 7.650 ), ( Ipn: C487 71-24 ), ( Placement On Vehicle: Air Fuel Delivery Fuel Injection System ), ( Compatible Year: 2023 2022 2021 2020 2019 2018 2017 2016 2015 ), ( 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 Audi 2.0l L4 Air Bs fits S3 2015–2023

The **Hitachi SX-2942 Fuel Injection Throttle Body** is a high-performance, precision-engineered component designed specifically for the **2015 2023 Audi S3 2.0L L4 Air Quattro (BS) models**, ensuring optimal airflow, throttle response, and fuel delivery for enhanced engine performance. Crafted from durable, high-grade materials, this throttle body features a **smooth-bore design** that minimizes turbulence and maximizes efficiency, allowing for cleaner airflow into the engine while reducing parasitic drag. The **sealed, precision-machined throttle plate** ensures consistent and responsive throttle operation, eliminating common issues like sticking or hesitation that can plague stock units. Built to meet or exceed OEM specifications, this throttle body is compatible with both **direct-injection and port-injection setups**, making it an ideal upgrade for those looking to improve throttle response, reduce carbon buildup, and enhance overall drivability whether for daily driving or spirited performance applications. The **robust construction** and **corrosion-resistant materials** ensure long-lasting reliability, even under demanding conditions, while the **easy-to-install design** allows for a straightforward swap without the need for extensive modifications. Whether you're tuning your S3 for better acceleration, improving fuel economy, or simply restoring factory performance, the Hitachi SX-2942 throttle body delivers a seamless, high-quality solution that elevates both performance and reliability.

### Pros and Cons of buying a Hitachi SX-2942 Fuel Injection Throttle Body for a 2015 2023 Audi S3 2.0L L4 Air B5 Engine

#### **Pros:**

1. **Performance Gains** The Hitachi SX-2942 is a high-quality throttle body designed to improve airflow and throttle response, which can enhance acceleration and overall engine performance. It is often used in tuning applications to complement forced induction or naturally aspirated setups.

2. **Durability and Quality** Hitachi is a well-known brand in the aftermarket performance parts industry, known for producing reliable and durable components. The SX-2942 is built to withstand higher airflow demands, making it suitable for modified engines.

3. **Compatibility** This throttle body is specifically designed for the 2.0L L4 Air B5 engine found in the Audi S3 (2015 2023), ensuring a proper fit without the need for extensive modifications. It is also compatible with other models in the same platform, such as the Volkswagen Golf GTI and SEAT Le n Cupra.

4. **Improved Throttle Response** The throttle body plays a critical role in how quickly and smoothly the engine responds to driver input. The SX-2942 s design can reduce lag and improve responsiveness, which is particularly noticeable in high-performance applications.

5. **Compatibility with Tuning** If you plan to tune your engine (e.g., with a chip, ECU flash, or standalone device), the SX-2942 is a popular choice among tuners. It works well with systems like Haltech, Link, or AEM, allowing for optimized fuel delivery and airflow.

6. **Ease of Installation** Compared to some other performance parts, throttle bodies like the SX-2942 are relatively straightforward to install, especially if you have basic mechanical skills or access to a professional. The kit typically includes all necessary gaskets and mounting hardware.

7. **Support for Forced Induction** If you are running a turbocharger or supercharger, the SX-2942 can help manage the increased airflow more efficiently, reducing the risk of throttle body failure under boosted conditions.

8. **Positive Community Feedback** Many owners and tuners in the Audi S3 and Volkswagen GTI communities report positive experiences with the Hitachi SX-2942, citing improved power delivery and reliability.

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#### **Cons:**

1. **Cost** The Hitachi SX-2942 is not a cheap part. Depending on the retailer and any additional accessories (e.g., throttle position sensor, wiring harness), the total cost can range from $300 to $600 or more. This is a significant investment, especially if you are on a budget.

2. **Requires Tuning** Simply swapping in the throttle body will not yield optimal results. You will need to retune your engine (either via a chip, ECU flash, or standalone device) to account for the increased airflow. This adds another layer of cost and complexity, as tuning is not a DIY-friendly process for everyone.

3. **Potential for ECU Issues** Some Audi S3 models may require additional adjustments to the ECU to prevent error codes or drivability issues. If the stock ECU is not updated or recalibrated, you might experience rough idling, stalling, or reduced fuel efficiency.

4. **Wiring and Sensor Compatibility** The SX-2942 may require a new throttle position sensor (TPS) or wiring harness to ensure proper signal transmission to the ECU. Some kits include these, but others may need to be purchased separately, adding to the overall cost.

5. **Installation Complexity** While the throttle body itself is relatively easy to install, the process may involve disconnecting the stock throttle body, routing new wiring, and ensuring proper sealing. If you are not comfortable with engine bay work, you may need to pay a mechanic to install it.

6. **Risk of Voiding Warranty** If your Audi S3 is still under warranty, installing aftermarket parts like the Hitachi throttle body could void certain coverage, especially if the manufacturer considers it a "non-OEM" modification.

7. **Potential for Overkill** If you are not planning to tune your engine or only do light modifications, the performance gains from the SX-2942 may not be worth the investment. For stock or mildly modified engines, the benefits may be minimal.

8. **Learning Curve for Tuning** If you decide to tune the engine yourself (e.g., using a standalone device like a Haltech or AEM), there is a learning curve involved. Incorrect tuning can lead to poor performance, engine damage, or even failure.

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### **Conclusion:**

The Hitachi SX-2942 throttle body is a high-quality, performance-oriented upgrade for the 2015 2023 Audi S3 2.0L L4 engine, particularly if you are planning to tune the car for forced induction or significant power gains. It offers noticeable improvements in throttle response, airflow, and overall drivability, but it is not a "plug-and-play" solution. The part requires tuning, which adds complexity and cost, and it may not be necessary for those who are only looking for minor improvements.

If you are committed to pushing your S3 s performance whether for track use, daily driving, or forced induction then the SX-2942 is a solid choice. However, if you are on a tight budget or only want incremental gains, you might consider alternative upgrades (e.g., a performance air intake or exhaust system) that offer better value for money.

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### **Recommendation:** - **Buy the Hitachi SX-2942 if:**

- You are planning to tune your engine (either with a chip or standalone device).

- You are running or planning to run forced induction (turbo/supercharger).

- You want improved throttle response and airflow for high-performance applications.

- You are willing to invest in a high-quality, durable part that will last under demanding conditions.

- **Avoid the Hitachi SX-2942 if:**

- You are not planning to tune the engine and want a simple, cost-effective upgrade.

- Your budget is limited, and you can achieve similar (or better) results with less expensive modifications.

- You are uncomfortable with the installation process or tuning requirements.

- You are concerned about voiding your warranty or dealing with potential ECU issues.

For those who decide to proceed, pair the throttle body with a reputable tuner (either a professional or a trusted standalone device) to ensure optimal performance and reliability. Always research and consult with experienced tuners or forums (e.g., Audi S3 forums, GTI Plus, or VWVortex) before making the purchase.

Details:

Hitachi Fuel Injection Throttle Body for 2015 2023 Audi S3 2.0L L4 Air bs: Status: In Stock.

specifications carfuelinjector:

  • for models: S3
  • for makes: Audi
  • for years: 2015-2023
  • brand: Hitachi Automotive
  • mpn: Sx-2942
  • type: Fuel Injection Throttle Body
  • item weight: 2.9000
  • manufacturer warranty: 1 Year
  • item width: 8.600
  • item height: 4.380
  • item length: 7.650
  • ipn: C487 71-24
  • placement on vehicle: Air Fuel Delivery Fuel Injection System
  • compatible year: 2023 2022 2021 2020 2019 2018 2017 2016 2015
  • core charge: Free No Core Charge
  • fitment type: Direct Replacement
  • bundle description: 1 Pc Genuine Hitachi Fuel Injection Throttle Body

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  • options: Ship-to-home
  • started: April 13, 2026
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  • availability: In Stock
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  • Air Fuel Delivery > Fuel Injection Parts > Fuel Injectors
for models: s3, for makes: audi, for years: 2015-2023, type: fuel injection throttle body, item weight: 2.9000, manufacturer warranty: 1 year, item width: 8.600, item height: 4.380, item length: 7.650, placement on vehicle: air fuel delivery fuel injection system, compatible year: 2023 2022 2021 2020 2019 2018 2017 2016 2015, core charge: free no core charge, fitment type: direct replacement, bundle description: 1 pc genuine hitachi fuel injection throttle body,
category: auto parts > air fuel delivery > fuel injection parts > fuel injectors, sku: 15865880230908721,
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