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  3. BOSCH 16GRWKC34

BOSCH 16GRWKC34 Upper Fuel Injector Seal

fits model: 2500, 3500, Gl350, Gl320, Ml350, S350, Sprinter.

16grwkc34 Bosch Upper Fuel Injector Seal For Sprinter 2500 3500 Gl350 Gl320 Ml350 S350

( Brand: Bosch ), ( Manufacturer Part Number: 16GRWKC34 ), ( Type: Fuel Injector Seal ), ( Placement On Vehicle: Upper ), ( Fits 1: 2010-2016 Mercedes Gl350 ), ( Fits 2: 2007-2009 Mercedes Gl320 ), ( Fits 3: 2012-2014 Mercedes Ml350 ), ( Manufacturer Warranty: 12 Month Warranty ), ( Attention: Please Read All Notes To Confirm Fitment ), ( Cs-sku: 400 )

Review BOSCH Upper Fuel Injector Seal fits SPRINTER 2500 3500 GL350 GL320 ML350 S350

The **Bosch 16GRWKC34 Upper Fuel Injector Seal** is a precision-engineered component designed exclusively for Mercedes-Benz Sprinter vans and commercial vehicles equipped with the **OM646, OM654, OM651, OM642, and OM646 DE22** diesel engines, including models such as the **Sprinter 2500, 3500, GL350, GL320, ML350, and S350** from the **W255 chassis generation**. This high-performance seal is crafted from **high-grade nitrile rubber (NBR) with a reinforced silicone core**, ensuring optimal durability, temperature resistance, and chemical compatibility with modern diesel fuel systems. Engineered to meet the rigorous demands of Mercedes-Benz s fuel injection architecture, the **16GRWKC34** features a **precision-molded lip design** that guarantees a tight, leak-proof seal between the fuel rail and injector, preventing fuel leaks, vapor lock, and potential engine performance degradation. Its **heat-resistant properties** allow it to withstand the extreme temperatures generated during high-pressure fuel injection cycles, while its **abrasion-resistant construction** ensures longevity even in demanding driving conditions, including frequent stop-and-go traffic or heavy-duty towing. The seal s **OEM-quality fitment** eliminates the need for modification, providing a direct drop-in replacement that maintains factory specifications for proper injector operation and fuel delivery. Whether installed during routine maintenance, a fuel system overhaul, or as part of a preventive upgrade, this Bosch seal delivers **reliability, efficiency, and peace of mind**, helping to preserve the integrity of your Sprinter s fuel injection system and extend the lifespan of critical engine components.

### **Pros and Cons of buying a Bosch 16GRWKC34 Upper Fuel Injector Seal for Mercedes-Benz Sprinter (2500/3500 GL350/GL320 ML350/S350)**

#### **Pros:**

1. **OEM Quality and Compatibility** The Bosch 16GRWKC34 is an original equipment (OEM) or high-quality aftermarket part designed specifically for Mercedes-Benz engines (OM646, OM654, OM651) used in the Sprinter 2500/3500 and ML350/S350. This ensures proper fitment and performance without compatibility issues.

2. **Reliability and Durability** Bosch is a well-known manufacturer of automotive seals and gaskets, known for durability and resistance to fuel, oil, and heat. A high-quality seal reduces the risk of leaks, which can cause fuel system malfunctions or engine damage over time.

3. **Prevents Fuel Leaks** A failing upper fuel injector seal can lead to fuel leaks, which may cause misfires, poor fuel economy, or even fire hazards. Replacing it with a Bosch seal helps maintain a tight seal, ensuring proper fuel delivery to the injectors.

4. **Easy Installation** The seal is designed for straightforward replacement, typically requiring only basic tools. Many mechanics and DIYers find it a manageable repair, especially if the fuel rail is removed as part of the process.

5. **Widely Available and Affordable** Bosch parts are widely stocked by auto parts retailers (both online and in-store), making them easy to source. Pricing is competitive compared to OEM replacements, offering good value for the quality provided.

6. **Prevents Long-Term Damage** Ignoring a failing injector seal can lead to more extensive fuel system issues, such as contaminated fuel, damaged injectors, or even a failed fuel pump. Replacing the seal proactively can save money on costly repairs down the line.

7. **Compatibility with Aftermarket Injectors** If you ve upgraded to aftermarket fuel injectors (e.g., Delphi, Siemens, or Bosch high-flow injectors), using the correct OEM-style seal ensures a proper seal, preventing leaks that could damage the new injectors.

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#### **Cons:**

1. **Potential for Counterfeit Parts** Since Bosch is a premium brand, there is a risk of purchasing counterfeit or low-quality knockoffs, especially when buying from untrusted online sellers. Always verify the seller s reputation and check for authenticity (e.g., original packaging, serial numbers, or seller reviews).

2. **Requires Disassembly for Replacement** Installing the seal typically involves removing the fuel rail, injectors, and possibly the intake manifold. This can be time-consuming, especially for inexperienced DIYers, and may require additional tools (e.g., injector removal tools, torque wrench).

3. **Risk of Damage During Installation** If not installed correctly, the seal can be damaged or improperly seated, leading to leaks. Over-tightening or under-tightening bolts can also cause issues with the fuel rail or injectors.

4. **Cost of Additional Parts** While the seal itself is reasonably priced, the repair may require new injector O-rings, fuel rail gaskets, or even new injectors if they are damaged during removal. These extras can increase the total cost of the repair.

5. **Labor Time for Professionals** If taking the vehicle to a mechanic, labor costs for fuel system disassembly and reassembly can be significant, especially in high-cost areas. DIYers may save money but risk mistakes if unfamiliar with the process.

6. **Potential for Fuel System Contamination** If the seal is old and degraded, removing it may release debris into the fuel system. This can clog fuel filters or injectors, requiring additional cleaning or replacement.

7. **Limited Lifespan in Harsh Conditions** While Bosch seals are durable, extreme heat, poor fuel quality, or aggressive driving can accelerate wear. In high-mileage vehicles or those used in harsh environments, the seal may need replacement sooner than expected.

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### **Conclusion:**

The **Bosch 16GRWKC34 upper fuel injector seal** is a **reliable, high-quality choice** for Mercedes-Benz Sprinter (2500/3500) and ML350/S350 vehicles with OM646/OM654/OM651 engines. Its OEM-level compatibility, durability, and widespread availability make it a **strong recommendation** for preventing fuel leaks and injector failures. However, the **risk of counterfeit parts, installation complexity, and potential additional costs** (e.g., new O-rings, labor) should be considered.

For **DIYers**, this is a **manageable repair** if proper tools and patience are available. For those uncomfortable with fuel system work, a **trusted mechanic** should handle the installation to avoid mistakes.

### **Recommendation:**

- **Buy from a reputable seller** (e.g., RockAuto, Amazon with verified reviews, or a local Mercedes specialist) to avoid counterfeit parts.

- **Check for leaks or symptoms** (e.g., fuel odors, rough idle, check engine lights) before purchasing this ensures the seal is genuinely needed.

- **Consider a full fuel system inspection** if the vehicle has high mileage or history of fuel issues (e.g., new injector O-rings, fuel filter replacement).

- **Follow Mercedes-Benz service procedures** for torque specifications and seal installation to prevent damage.

- **If unsure about DIY installation**, consult a **Mercedes-Benz specialist** or a mechanic experienced with diesel fuel systems.

**Final Verdict:** The Bosch 16GRWKC34 is the **best choice** for this application due to its quality and compatibility, but proper sourcing and installation are critical for success.

Details:

Upper Fuel Injector Seal 16GRWKC34 for Sprinter 2500 3500 GL350 GL320 ML350 S350: Position: Brand: Bosch condition: New, Notes Seal, Detailed Applications Vehicle Sub model Engine, 2014 - 2016 Mercedes E250, 2007 2009 E320, 2011 - 2013 E350Bluetec, GL320, 2010 - 2016 GL350, 2013 - 2015 GLK250, 2015 ML250, ML320, 2012 - 2014 ML350Bluetec 4Matic, R320, 2010 - 2012 R350Bluetec 2012 - 2013 S350, 2010 - 2013, 2018 25 2014 -2017, 2019 2022 25003.0L V6, 2018 - 2019 35 2020 2022 35003.0L 3500XD3.0L 3500XD. Vehicle Engine, Fitment Notes: For cars with Code A11. 2016 Mercedes GLE300d, 2014 2017 Sprinter 25002.1L 4 Cl, 35002.1L Cl.

part #: 16grwkc34 price

  • $18.12

specifications carfuelinjector:

  • for models: 2500, 3500, Gl350, Gl320, Ml350, S350, Sprinter
  • brand: Bosch
  • mpn: 16grwkc34
  • type: Fuel Injector Seal
  • placement on vehicle: Upper
  • fits 1: 2010-2016 Mercedes Gl350
  • fits 2: 2007-2009 Mercedes Gl320
  • fits 3: 2012-2014 Mercedes Ml350
  • manufacturer warranty: 12 Month Warranty
  • attention: Please Read All Notes To Confirm Fitment
  • cs-sku: 400

general carfuelinjector:

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

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offer carfuelinjector:

  • options: Ship-to-home
  • quantity: 1
  • sold: 0
  • availability: In Stock
  • started: May 12, 2026

seller carfuelinjector:

  • # reviews: 57973
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  • transit: 3-8 Days
  • type: Fixed
  • class: Standard
  • cost: $0.00
  • service: Standard
for models: 2500, 3500, gl350, gl320, ml350, s350, sprinter, type: fuel injector seal, placement on vehicle: upper, fits 1: 2010-2016 mercedes gl350, fits 2: 2007-2009 mercedes gl320, fits 3: 2012-2014 mercedes ml350, manufacturer warranty: 12 month warranty, attention: please read all notes to confirm fitment, cs-sku: 400,
category: auto parts > air fuel delivery > fuel injection parts > fuel injectors, sku: 16443712217072602,
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