MOPAR 4891577AD Fuel Injector

( Brand: Mopar ), ( Manufacturer Part Number: 4891577AD ), ( Type: Fuel Injector ), ( Fuel Type: Gasoline )

Review MOPAR New Oe Jeep Fuel Injector 4891577 fits PATRIOT COMPASS 2007–2017

The **Mopar 4891577AD Fuel Injector** is a precision-engineered component designed exclusively for the **2007 2017 Jeep Patriot and Compass** vehicles equipped with the **3.8L V6 engine (383 cubic inches)**, specifically the **EUR (Electronic Unit Injector Replacement) or EFI (Electronic Fuel Injection) system**. This high-performance injector is a direct replacement for the original equipment manufacturer (OEM) part, ensuring seamless compatibility with the vehicle s fuel delivery system. Crafted from durable materials, including a robust stainless steel body and a precision-machined nozzle, this injector delivers an optimal blend of fuel efficiency and engine performance. The **4891577AD** features a **high-flow design** with a **12-hole pattern**, allowing for precise fuel atomization and even distribution across the engine s cylinders, which enhances combustion efficiency and reduces emissions. Engineered to meet or exceed **OEM specifications**, this injector incorporates advanced **electronic control** for accurate fuel metering, adapting dynamically to varying engine demands whether during idle, cruising, or under load. Built to withstand the rigors of daily driving, this component is resistant to corrosion and fuel system contaminants, ensuring long-term reliability. Whether replacing a worn-out injector, upgrading for improved throttle response, or addressing fuel delivery issues, the **Mopar 4891577AD** provides a dependable solution that restores or enhances engine performance while maintaining the integrity of the Jeep s fuel injection system.

### **Pros and Cons of buying a Mopar 4891577A-D Fuel Injector (2007 2017 Jeep Patriot/Compass)**

1. **Direct Fit Replacement** This is a genuine Mopar OEM (Original Equipment Manufacturer) part, meaning it is designed specifically for the 2007 2017 Jeep Patriot and Compass engines (3.7L V6). It should fit without modification, ensuring proper function and compatibility with the vehicle s fuel delivery system.

2. **High Quality and Durability** Mopar parts are built to meet Chrysler/Dodge factory standards, which generally means better reliability compared to aftermarket knockoffs. The injector is likely made from durable materials resistant to corrosion and wear over time.

3. **Warranty Coverage** Mopar parts often come with a limited warranty (typically 12 months or more), providing some peace of mind in case of defects. This can be particularly useful if the injector fails prematurely.

4. **Performance Consistency** Since it is an OEM part, it should deliver consistent fuel spray patterns and flow rates, helping maintain engine performance, fuel efficiency, and emissions compliance.

5. **Ease of Installation** Being a direct-fit part, it should integrate smoothly with the vehicle s existing wiring harness and fuel rail, reducing the risk of installation errors that could occur with non-OEM alternatives.

6. **Compatibility with Common Issues** Many 2007 2017 Jeep Patriot/Compass owners experience fuel injector failures due to age, carbon buildup, or electrical issues. Replacing a faulty injector with this part can restore proper fuel delivery and prevent further engine problems like misfires, rough idling, or poor acceleration.

7. **Support for Emissions Compliance** Modern vehicles, including these Jeeps, rely on precise fuel injection for emissions control. A properly functioning injector helps the vehicle pass emissions tests and avoids potential legal or registration issues.

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1. **Cost** Mopar OEM parts are generally more expensive than aftermarket alternatives. While this ensures quality, the price may be prohibitive for budget-conscious buyers, especially if multiple injectors need replacement.

2. **Potential for Counterfeit Parts** Even with Mopar branding, there is a risk of purchasing counterfeit or refurbished parts that do not meet OEM standards. Buying from an authorized dealer or reputable online retailer (e.g., RockAuto, Mopar s official website, or a trusted local parts store) can mitigate this risk but does not eliminate it entirely.

3. **Limited Availability** Depending on the region, Mopar injectors may not always be in stock at local dealerships or auto parts stores. This could require ordering online, which may involve shipping delays or additional fees.

4. **Labor Costs** While the injector itself is a direct fit, replacing it may require professional installation, especially if the fuel rail or wiring harness needs adjustment. Labor costs can add significantly to the total expense, particularly if the work is done at a dealership.

5. **Age of the Vehicle** If the Jeep Patriot or Compass is older (closer to 2017), the fuel system may have accumulated carbon deposits or other contaminants that could affect the new injector s performance. In such cases, additional maintenance (e.g., fuel system cleaning or injector servicing) may be necessary.

6. **Mixed Reviews on Longevity** Some owners report that even OEM injectors in these vehicles may fail prematurely due to design flaws, poor fuel quality, or electrical issues. While Mopar parts are generally reliable, they are not immune to wear and tear, especially in high-mileage vehicles.

7. **Potential for Additional Problems** Replacing a single injector may not always solve underlying issues, such as a failing fuel pump, clogged fuel filter, or vacuum leaks. If these problems persist, further diagnostics and repairs may be needed, increasing the overall cost.

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### **Conclusion**

The **Mopar 4891577A-D fuel injector** is a strong choice for replacing a faulty injector in a 2007 2017 Jeep Patriot or Compass due to its OEM quality, direct fit, and warranty support. It offers reliability and compatibility, which are critical for maintaining engine performance and avoiding further damage. However, the higher cost and potential for counterfeit parts are drawbacks that must be weighed against the benefits.

If budget is a concern, aftermarket injectors from reputable brands (e.g., Delphi, Denso, or Stanadyne) can be a cost-effective alternative, provided they are properly matched to the vehicle s specifications. Always verify the part s authenticity and ensure it is compatible with the engine s fuel system.

For most Jeep owners, the **Mopar injector is the safest and most reliable option**, especially if the vehicle is still under warranty or if you prefer the assurance of an OEM part. However, if the injector fails again shortly after replacement, it may indicate a deeper issue (e.g., fuel pressure problems, wiring faults, or carbon buildup) that should be addressed by a professional mechanic.

### **Recommendation**

- You prioritize OEM quality and warranty coverage.

- You have verified the part s authenticity from a trusted source.

- You are prepared for the higher cost but want long-term reliability.

- The vehicle s fuel system is otherwise in good condition.

- You are on a tight budget and can find a high-quality injector (e.g., Delphi or Denso) with positive reviews.

- You are comfortable performing the replacement yourself to save on labor costs.

- You suspect other underlying issues (e.g., fuel pump, fuel filter) that may need attention.

- Check for **carbon buildup** in the injectors or fuel system (ultrasonic cleaning may be needed).

- Test the **fuel pressure** to ensure it is within specifications.

- Inspect the **wiring harness** and **fuel rail** for damage or corrosion.

- If possible, replace all injectors at once (if multiple are failing) to avoid future issues.

Ultimately, the Mopar injector is the **best choice for most Jeep owners** seeking a reliable, long-lasting replacement, but thorough diagnostics and maintenance should accompany the installation for optimal results.

Details:

NEW Either OE parts, Bin 1 Other parts.

part #: 4891577ad prices

• $74.62-$133.33

specifications carfuelinjector:

• for models: Patriot, Compass
• for makes: Jeep, Mopar
• for years: 2007-2017
• brand: Mopar
• mpn: 4891577ad
• type: Fuel Injector
• fuel type: Gasoline

shipping carfuelinjector:

• class: Expedited
• type: Fixed
• service: USPS Priority Mail
• carrier: USPS
• cost: $0.00
• transit: 4-8 Days

offer carfuelinjector:

• availability: In Stock
• quantity: 1
• started: February 5, 2026
• best offers: True
• sold: 0
• options: Ship-to-home

seller carfuelinjector:

• city: Detroit, Michigan
• rating: 100.0%
• # reviews: 5494

returns carfuelinjector:

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

payments carfuelinjector:

• credit card: Discover
• other
• wallet: Paypal

general carfuelinjector:

• Air Fuel Delivery > Fuel Injection Parts > Fuel Injectors
• condition: New other see details

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