BMW 780808903 Diesel Fuel Injector Set M57

( Manufacturer Part Number: 780808903 ), ( Mounting Style: Bolt-on ), ( Location: 22-5-1 ), ( Type: Fuel Injector ), ( Vintage Part: No ), ( Country Of Origin: Germany ), ( Fuel Type: Diesel )

Review BMW M57 Diesel Fuel Injector Complete Set Genuine Oem fits E90 E70 X5 335D 2009–2013

The **BMW 780808903 Fuel Injector Set (2009 2013 E90/E70 M57 335d Diesel)** is a precision-engineered component designed to deliver optimal performance and reliability for BMW s high-efficiency M57D30 diesel engine, found in models like the 335d (E90) and X5 335d (E70). This set comprises a complete assembly of high-quality, OEM-specification fuel injectors, meticulously crafted to meet BMW s stringent engineering standards while ensuring seamless integration with the engine s advanced common-rail direct-injection system. Each injector in this set is engineered with a robust **piezoelectric actuator**, enabling precise fuel atomization and injection timing, which is critical for maximizing power output, torque delivery, and fuel efficiency hallmarks of the M57 s performance. The injectors are built with **high-pressure resistant materials**, including hardened steel nozzles and advanced sealing systems, to withstand the extreme pressures (up to 2,000 bar) and thermal cycling inherent in diesel combustion. This durability minimizes the risk of leaks, clogging, or premature wear, extending both the injector s lifespan and the overall health of the engine. The set is fully compatible with the **E70/E90 M57D30 engine s fuel rail and control module**, ensuring seamless calibration and performance without the need for additional modifications. Whether replacing worn or failed injectors due to carbon buildup, wear, or contamination, this set restores the engine s factory-intended efficiency, reducing emissions and improving throttle response. For enthusiasts and mechanics alike, this injector set represents a critical upgrade or replacement solution, ensuring that the 335d s diesel powerplant operates at peak performance with the reliability BMW drivers expect.

### Pros and Cons of Buying a Used BMW E90/E70 M57D Diesel Fuel Injector Set (2009 2013 Models)

#### **Pros**

1. **Improved Performance and Reliability**

- A new or high-quality aftermarket fuel injector set can restore or enhance engine performance, especially if the original injectors were failing or leaking. The M57D engine is known for its durability, but injector wear over time can lead to misfires, poor fuel efficiency, or power loss. Replacing them with OEM or compatible injectors can address these issues, making the engine run smoother and more efficiently.

2. **Better Fuel Economy**

- Worn injectors may not atomize fuel properly, leading to incomplete combustion and reduced fuel efficiency. New injectors ensure precise fuel delivery, which can improve mileage, particularly beneficial for diesel engines that are already known for their efficiency.

3. **Prevents Long-Term Engine Damage**

- Faulty injectors can cause carbon buildup, clogged fuel lines, or even engine misfires, which can lead to more severe damage like turbocharger failure or exhaust manifold cracks. Replacing them proactively can avoid costly repairs down the line.

4. **Compatibility with Modern Upgrades**

- If you plan to modify the engine (e.g., turbo upgrades, tuning, or exhaust changes), new injectors are often necessary to handle increased fuel demands. They can also work better with modern fuel management systems or ECU tunes.

5. **Cost-Effective Compared to Engine Replacement**

- Replacing injectors is significantly cheaper than overhauling or replacing the entire engine. For a diesel BMW like the E90 335d or E70 X5 335d, injector failure is a common issue, and addressing it early can save thousands in repairs.

6. **Potential for Increased Resale Value**

- If the vehicle is well-maintained and the injector replacement is documented, it can make the car more attractive to buyers who prioritize reliability. A clean service history with injector upgrades can justify a higher asking price.

---

#### **Cons**

1. **High Upfront Cost**

- A full set of fuel injectors for the M57D engine can be expensive, especially if opting for OEM or high-quality aftermarket brands (e.g., Bosch, Siemens, or Delphi). Prices can range from $1,500 to $3,000 or more, depending on the brand and whether labor is included. This is a significant investment for a used vehicle.

2. **Labor-Intensive Installation**

- Installing fuel injectors requires removing the fuel rail, disconnecting fuel lines, and potentially recalibrating the ECU. This job is best left to a professional BMW diesel specialist, as improper installation can lead to leaks, air in the fuel system, or even injector damage. Labor costs can add another $500 $1,500 to the total expense.

3. **Potential for Compatibility Issues**

- While the M57D is a common engine, not all aftermarket injectors are drop-in replacements. Some may require ECU reprogramming or additional modifications (e.g., updated fuel maps) to function correctly. Using incompatible injectors can cause drivability issues or even damage the engine.

4. **Risk of Recurring Issues**

- Even with new injectors, other components in the fuel system (e.g., fuel pump, injectors, or common rail) may still be failing. If these are not addressed simultaneously, the problem may recur, leading to additional expenses. A thorough diagnostic check before replacement is essential.

5. **Time Off the Road**

- The installation process can take several hours, and the vehicle will be out of commission during this time. For daily drivers, this downtime can be inconvenient, especially if the injectors are failing intermittently.

6. **Warranty and Quality Concerns**

- Aftermarket injectors may not come with the same warranty as OEM parts, and lower-quality injectors can fail prematurely. Researching brands and reading reviews is crucial to avoid buying subpar components that may need replacement sooner than expected.

---

### **Ending Conclusion**

Buying a used BMW E90/E70 M57D diesel vehicle with a fuel injector set replacement is a **highly recommended upgrade** if the injectors are confirmed to be failing or degraded. The benefits improved performance, fuel efficiency, and long-term engine protection far outweigh the costs for most owners who plan to keep the vehicle for the long term. However, the upfront expense and labor requirements make it a significant financial commitment, so it s best suited for those who:

- Have a reliable vehicle with other systems in good condition.

- Are prepared for professional installation and potential ECU adjustments.

- Can afford the cost without stretching their budget too thin.

For owners who are unsure about the injectors condition, a diagnostic test (e.g., fuel pressure check, injector flow test, or scan tool analysis) is essential before committing to replacement. If the injectors are only mildly worn, other solutions like cleaning or minor repairs might be more cost-effective.

### **Recommendation**

1. **Verify Injector Condition First**

- Before purchasing injectors, confirm their failure through a professional diagnostic. Symptoms like rough idling, black smoke, loss of power, or check engine lights (P0000, P0010, P0011, etc.) are strong indicators of injector issues.

2. **Choose Quality Injectors**

- Opt for OEM or reputable aftermarket brands (e.g., Bosch, Siemens, or Delphi) with a solid warranty. Avoid no-name injectors, as they may not meet the M57D s requirements.

3. **Hire a BMW Diesel Specialist**

- Have the installation done by a mechanic experienced with BMW diesel engines. They can ensure proper calibration, leak testing, and ECU adjustments if needed.

4. **Consider a Full Fuel System Overhaul**

- If replacing injectors, it may be wise to also check the fuel pump, fuel lines, and common rail for wear. Addressing these components simultaneously can prevent future issues.

5. **Budget for Contingencies**

- Set aside additional funds for potential ECU reprogramming, diagnostic tests, or unexpected repairs (e.g., turbocharger or fuel rail issues).

6. **Document the Work**

- Keep records of the injector replacement, including receipts and service notes. This can help with resale value and future warranty claims.

**Final Verdict:** If the injectors are confirmed faulty and the vehicle is otherwise sound, replacing them is a **worthwhile investment** that can extend the life and performance of your M57D BMW. However, proceed with caution, prioritize quality parts, and ensure professional installation to avoid costly mistakes. For vehicles with severe injector failure or other major issues, weigh the total cost of repairs against the car s value and your intended use.

Details:

Listed part could be ONE of the options for listed vehicle, NOT only option it.

part #: 780808903 price

• $899.99

specifications carfuelinjector:

• for models: E90, E70, X5, 335d
• for makes: Bmw
• for years: 2009-2013
• mpn: 780808903
• mounting style: Bolt-on
• location: 22-5-1
• type: Fuel Injector
• vintage part: No
• country of origin: Germany
• fuel type: Diesel

payments carfuelinjector:

• other
• credit card: Visa
• wallet: Paypal

general carfuelinjector:

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

offer carfuelinjector:

• sold: 0
• quantity: 1
• options: Ship-to-home
• availability: In Stock
• started: March 25, 2026

returns carfuelinjector:

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

seller carfuelinjector:

• rating: 99.9%
• # reviews: 2252
• city: Kannapolis, North Carolina

shipping carfuelinjector:

• cost: $19.99
• type: Fixed
• service: Standard
• class: Standard
• transit: 3-7 Days

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