STANDARD FJ1214 Fuel Injector 727943221124

( Brand: Standard ), ( Manufacturer Part Number: FJ1214 ), ( Manufacturer Warranty: 90 Day ), ( Type: Fuel Injector ), ( UPC: 727943221124 )

Review STANDARD Fuel Injector Infiniti fits FX50 2009–2013

The **standard OEM fuel injector for the 2009 2013 Infiniti FX50 (V6, 3.7L, NA, FJ1214 engine)** is a precision-engineered component designed to deliver optimal fuel efficiency and performance in this luxury crossover s naturally aspirated inline-six powerplant. Part of the **Denso** or **Bosch** family (depending on the specific model year), this **high-pressure, pintle-style injector** operates at a precise 100 bar (1,450 psi) pressure, ensuring accurate metering of gasoline into the combustion chamber for consistent ignition and power output. Crafted from durable **stainless steel and high-grade aluminum alloys**, the injector features a **ceramic-coated nozzle** to resist wear, corrosion, and carbon buildup, which is critical for maintaining long-term reliability in the FX50 s demanding driving conditions whether cruising on highways, navigating city traffic, or towing light loads. The **electromagnetic solenoid** within the injector activates with millisecond precision, controlling the fuel spray pattern to optimize atomization, reducing emissions and improving throttle response. For the **2009 2011 models**, these injectors are often **Denso 4100 series**, while the **2012 2013 iterations** may utilize **Bosch 0 220 150 001** or **Denso 4101 variants**, all of which are engineered to match the FX50 s **direct-injection system** with a **5-hole pintle nozzle** for efficient fuel distribution. Properly maintained, these injectors can last **100,000 miles**, but factors like **low-quality fuel, carbon deposits, or electrical issues** can accelerate wear, leading to symptoms like **rough idling, misfires, or reduced fuel economy**. Replacement injectors must be **calibrated to the original OEM specifications** to avoid performance discrepancies, and installation requires **specialized tools** to ensure proper sealing and electrical connectivity. Whether used in a **restoration project, routine maintenance, or performance upgrade**, this fuel injector remains a **critical component** for preserving the FX50 s signature blend of refinement and power.

### Pros and Cons of Buying a Standard FJ1214 Fuel Injector (09 13 Infiniti FX50)

1. **Compatibility and Reliability** The FJ1214 is a well-documented and widely available injector for the 5.6L V8 engine found in the FX50 (2009 2013). It is a standard OEM part, meaning it is designed specifically for the vehicle s fuel system, ensuring proper fitment and performance.

2. **Performance Potential** Since these injectors are designed for stock applications, they can be upgraded with higher flow rates (e.g., 1,000 cc/min) to support forced induction or increased power without major modifications. Many tuners and performance shops offer aftermarket versions of this injector with improved durability and flow characteristics.

3. **Ease of Replacement** The FJ1214 is a relatively straightforward injector to replace, especially for those with basic mechanical skills. It is mounted on the intake manifold, and removal typically only requires disconnecting electrical connectors, removing bolts, and replacing the old injector with the new one. No major disassembly of the engine is usually required.

4. **Cost-Effective Upgrade** Compared to some aftermarket injectors, the standard FJ1214 (or its direct replacements) is often reasonably priced, especially when purchased from reputable suppliers. This makes it a cost-effective choice for those looking to maintain or improve fuel delivery without a significant investment.

5. **Support and Availability** Due to the popularity of the FX50 and its engine, parts like the FJ1214 are widely available from both OEM and aftermarket suppliers. This means you can easily find replacements, gaskets, or related components if needed.

6. **Compatibility with Tuning** The FX50 s ECU is relatively tuner-friendly, and the FJ1214 injector can be paired with a tune to optimize fuel delivery for increased power, better throttle response, or improved fuel efficiency. Many tuners have mapped for this injector, making it a practical choice for performance builds.

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1. **Potential for Wear and Failure** Like all fuel injectors, the FJ1214 can wear out over time, especially if the vehicle has high mileage or has been driven aggressively. Common issues include clogging, leaking, or reduced flow rate, which can lead to rough idling, poor acceleration, or increased emissions. Regular maintenance (e.g., injector cleaning or replacement) is necessary to prevent these problems.

2. **Limited Flow Rate for High-Performance Applications** While the FJ1214 can be upgraded, the stock version is not designed for extreme power levels (e.g., 600 hp). Pushing it beyond its rated flow capacity without proper tuning or supporting modifications (e.g., upgraded fuel pump, fuel rail, or injectors) can lead to fuel starvation, poor atomization, or even injector failure.

3. **Dependence on Fuel Quality** The FJ1214, like all injectors, is sensitive to fuel quality. Poor-quality fuel, ethanol content, or contaminants can cause clogging or internal damage over time. Regular fuel system maintenance (e.g., using fuel additives or filters) is recommended to prolong injector life.

4. **Potential for Leaks or Electrical Issues** Over time, the O-ring or seals on the injector can degrade, leading to fuel leaks. Additionally, the electrical connectors can corrode or fail, causing intermittent issues or complete injector failure. Inspecting and replacing these components during maintenance is important.

5. **Compatibility with Aftermarket Modifications** While the FJ1214 works well with many aftermarket modifications, some high-flow injectors or performance parts may require additional tuning or supporting components (e.g., upgraded fuel pump, injectors with better atomization) to avoid issues like fuel starvation or poor idle quality.

6. **Mixed Reviews on Durability** Some owners report that the FJ1214 injectors, especially in older FX50s, can fail prematurely due to internal wear or manufacturing inconsistencies. This is not universal, but it is worth researching owner experiences or consulting with a mechanic before purchasing.

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The FJ1214 fuel injector is a solid choice for the 09 13 Infiniti FX50, offering a balance of reliability, compatibility, and performance potential. It is well-suited for stock or lightly modified applications and can be upgraded for more demanding setups. However, it is not without its drawbacks, particularly regarding wear, fuel quality dependence, and potential compatibility issues with high-performance builds.

For most FX50 owners, the FJ1214 is a practical and cost-effective option, especially if paired with regular maintenance and tuning. If you plan to push the vehicle to higher power levels, consider upgrading to higher-flow injectors (e.g., 1,000 cc/min) and ensuring the rest of the fuel system (pump, rail, fuel pressure regulator) is upgraded accordingly.

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- **For Stock or Mildly Modified FX50s:** Purchase a high-quality FJ1214 injector (preferably from a reputable supplier like Delphi, Denso, or a trusted aftermarket brand) and replace it as part of routine maintenance. Consider cleaning or replacing injectors every 60,000 100,000 miles to prevent clogging or failure.

- **For Performance Applications (300 500 hp):** Upgrade to higher-flow injectors (e.g., 1,000 cc/min or more) and pair them with a tune, upgraded fuel pump, and proper fuel pressure settings. Consult with a tuner or performance shop to ensure compatibility and avoid fuel delivery issues.

- **For Extreme Power (500 hp):** Consider dedicated high-performance injectors (e.g., Moroso, Delphi HP, or custom-built injectors) and a fully supported fuel system. The FJ1214 may not be sufficient for these levels without significant modifications.

- **Maintenance Tip:** Always use high-quality fuel, consider fuel additives (e.g., Seafoam or Techron), and inspect injectors for leaks or poor performance during regular maintenance.

If you are unsure about the condition of your current injectors or the best upgrade path, consult with a mechanic or tuner familiar with the FX50 to ensure you make the right choice for your specific needs.

Details:

This part fits vehicles made in the following years 2009 ,2010,201 1,2012,2013.

part #: fj1214 prices

• $95.22-$123.99

specifications carfuelinjector:

• for models: Fx50
• for makes: Infiniti
• for years: 2009-2013
• brand: Standard
• mpn: Fj1214
• manufacturer warranty: 90 Day
• type: Fuel Injector
• upc: 727943221124

payments carfuelinjector:

• other
• wallet: Apple-pay
• credit card: Diners-club

general carfuelinjector:

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

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• service: Economy
• class: Economy
• transit: 4-8 Days
• type: Fixed
• cost: $0.00

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• policy: Returns Accepted
• paid by: Seller
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seller carfuelinjector:

• # reviews: 2244
• city: Los Angeles, California
• rating: 98.6%

offer carfuelinjector:

• options: Ship-to-home
• sold: 0
• availability: In Stock
• started: March 9, 2026
• quantity: 8

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