MERCEDES 139-030-01-00 Connecting Rod Benz

( Manufacturer Part Number: 139-030-01-00 ), ( Part Type: Rod ), ( Genuine Oem: Yes ), ( Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Make: Mercedes-benz ), ( Year: 2020 2021 2022 2023 2024 2025 ), ( Parts Included: Only Part Reference 27 On The Diagram Is Included )

Review MERCEDES benz Genuine Connecting Rod fits 2020–2025

The **Mercedes-Benz 139-030-01-00 connecting rod** is a precision-engineered, high-performance component designed exclusively for the iconic **M117 OM617** and **OM617A** inline-six diesel engines, which power a range of Mercedes-Benz vehicles including the **E-Class (W124, W210), S-Class (W140, W220), and some models of the R-Class (W463)** from the late 1980s through the early 2000s. Crafted from **forged 42CrMo4 steel**, this connecting rod embodies the durability and reliability expected from Mercedes-Benz s legendary engineering, ensuring optimal strength, fatigue resistance, and longevity under the demanding conditions of high-performance diesel operation. The rod features a **split design with a fully machined cap**, allowing for precise alignment and load distribution across the crankshaft journals, which is critical for maintaining engine efficiency and minimizing wear over extended service intervals. Its **hollow construction** reduces weight without compromising structural integrity, contributing to improved engine balance and reduced inertia forces, thereby enhancing overall drivetrain performance and fuel economy. The **interchangeable rod bolts**, typically **M12 x 1.5** with a torque specification of **60 Nm (5.9 kgf m)**, are designed to be reused with proper torque application to prevent overtightening or loosening, which could lead to catastrophic failure. The rod s **oil holes and counterbores** are meticulously drilled to ensure proper lubrication flow, preventing dry spots and excessive friction between the rod s small and large ends, while the **bearing surfaces** are polished to a mirror-like finish to minimize friction and heat buildup. This component is a direct replacement for the original equipment (OEM) part, adhering to Mercedes-Benz s stringent quality standards and dimensional tolerances, making it an ideal choice for both restoration projects and high-mileage engines requiring a reliable upgrade. Whether installed in a classic Mercedes-Benz or a modernized diesel application, the **139-030-01-00 connecting rod** delivers the robustness and precision necessary to sustain peak engine performance while extending the lifespan of the entire powertrain.

### **Pros and Cons of buying a Mercedes-Benz 139-030-01-00 Connecting Rod**

#### **Overview**

The **Mercedes-Benz 139-030-01-00** is a forged steel connecting rod used in various high-performance and competition engines, particularly in the **M117 (OM617) diesel** and **M112 (M276) gasoline** applications (e.g., 500/600/700 series engines). It is a critical component that transmits force between the piston and crankshaft, making its quality essential for reliability and performance.

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### **Pros of purchasing a 139-030-01-00 Connecting Rod**

1. **High-Quality Forged Steel Construction**

- The rod is made from **high-strength forged steel**, which provides superior durability compared to cast rods. Forged rods are less prone to cracking under high stress, making them ideal for high-performance or modified engines.

2. **OEM Replacement Part**

- This is an **original equipment manufacturer (OEM) part**, meaning it meets Mercedes-Benz s exact specifications for fitment, materials, and machining tolerances. This ensures compatibility with the engine without requiring modifications.

3. **Reliability for High-Stress Applications**

- Forged rods are commonly used in **turbocharged, high-RPM, or modified engines** (e.g., race engines, heavy-duty trucks, or performance builds). They can withstand higher loads and thermal cycling better than standard cast rods.

4. **Widely Available and Supported**

- As an OEM part, it is **easily sourced** from Mercedes-Benz dealerships, authorized distributors, or reputable aftermarket suppliers. There is also a wealth of technical documentation and support available for installation and troubleshooting.

5. **Compatibility with Upgrades**

- If you plan to modify your engine (e.g., forced induction, larger pistons, or higher compression ratios), forged rods like this one can **prevent catastrophic failure** by handling increased stress. They are often recommended for **big-block or high-performance builds**.

6. **Long-Term Durability**

- Forged rods are known for their **longevity**, especially in applications where the engine operates under extreme conditions (e.g., towing, heavy loads, or racing). They are less likely to fail prematurely compared to aftermarket rods of unknown quality.

7. **Reduced Risk of Engine Damage**

- Using an OEM or high-quality forged rod minimizes the risk of **rod failure**, which can lead to severe engine damage (e.g., bent crankshaft, damaged cylinder walls, or oil leaks). This is particularly important in **diesel engines**, where connecting rods experience higher side loads.

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### **Cons of purchasing a 139-030-01-00 Connecting Rod**

1. **Higher Cost Compared to Aftermarket Alternatives**

- OEM parts, especially forged rods, are **more expensive** than generic aftermarket replacements. The price can range from **$100 to $300 per rod**, depending on the supplier and quantity purchased. This may be a significant investment if multiple rods need replacement.

2. **Limited Availability Outside Official Channels**

- While the part is available, sourcing it from **unauthorized sellers** may risk receiving counterfeit or substandard replicas. It is best purchased from **Mercedes-Benz dealerships, authorized distributors, or trusted aftermarket suppliers** (e.g., **Mercedes-Benz Parts, Euro Car Parts, or specialized engine rebuilders**).

3. **Potential for Overkill in Stock Engine Applications**

- If your engine is **stock or lightly modified**, the benefits of a forged rod may not be necessary. Stock cast rods are designed to handle normal operating conditions, and upgrading to forged rods may be **unjustified expense** unless you plan future modifications.

4. **Installation Complexity**

- Replacing connecting rods requires **specialized tools, expertise, and engine disassembly**. This is not a DIY-friendly job for most enthusiasts. If not installed correctly, it can lead to **misalignment, oil leaks, or premature wear**. Professional engine rebuilders should handle this task.

5. **Weight Considerations**

- Forged rods are **heavier** than cast rods, which can slightly reduce **engine responsiveness** in high-performance applications. While the difference is minimal, some tuners prefer lighter rods for better revving characteristics.

6. **Potential for Confusion with Other Rod Types**

- Mercedes-Benz engines use **multiple rod types** (e.g., 139-030-01-00 for some diesels, 139-030-02-00 for others). Purchasing the wrong rod can lead to **fitment issues or damage**. Always verify the **engine code, application, and rod dimensions** before buying.

7. **Depreciation in Some Applications**

- If you are restoring a **classic or high-mileage vehicle**, the cost of replacing rods may not be justified unless the engine is being rebuilt for performance or reliability. In some cases, **repairing damaged rods** (if feasible) may be a more cost-effective solution.

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### **Conclusion**

The **Mercedes-Benz 139-030-01-00 connecting rod** is a **high-quality, durable, and reliable** component that is ideal for **high-performance, modified, or competition engines**. Its forged steel construction ensures strength under extreme conditions, making it a **wise investment** for enthusiasts planning future upgrades or operating their vehicles under heavy loads.

However, the **higher cost, installation complexity, and potential overkill for stock engines** must be considered. If your engine is **stock or lightly modified**, the benefits may not outweigh the expense. On the other hand, if you are **rebuilding an engine for performance, racing, or heavy-duty use**, this rod is an excellent choice.

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### **Recommendation**

- You are **modifying your engine** (turbocharging, forced induction, high-RPM tuning).

- Your engine is **high-mileage, heavily used, or showing signs of wear** (e.g., oil leaks, knocking).

- You are **rebuilding an engine for competition or performance**.

- You want **OEM-level reliability** and are willing to pay for it.

- Your engine is **stock or lightly modified** and runs reliably.

- You are on a **tight budget** and cannot justify the cost.

- You lack the **experience or tools** to install it correctly (professional installation is highly recommended).

- You are unsure of the **exact rod type needed** for your engine (always verify with the engine code).

**Final Verdict:** For **performance, reliability, and longevity**, the **139-030-01-00 connecting rod is a strong recommendation** especially for Mercedes-Benz engines under heavy stress. However, weigh the cost against your specific needs before purchasing. If in doubt, consult a **Mercedes-Benz engine specialist** or **performance tuner** to ensure the right choice for your application.

Details:

C63 mags e performance. Parts must be resalable and in the original packaging. Electrical parts are not returnable. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer.

part #: 1390300100 prices

• $324.58-$437.89

specifications pistonrinro:

• for makes: Mercedes
• for years: 2020-2025
• mpn: 139-030-01-00
• part type: Rod
• genuine oem: Yes
• warranty: 1 Year
• fitment type: Direct Replacement
• make: Mercedes-benz
• year: 2020 2021 2022 2023 2024 2025
• parts included: Only Part Reference 27 On The Diagram Is Included

offer pistonrinro:

• quantity: 4
• sold: 0
• started: June 5, 2026
• availability: In Stock
• options: Ship-to-home

general pistonrinro:

• Car Truck Parts Accessories > Engines Engine Parts > Connecting Rods Parts
• condition: New

returns pistonrinro:

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

seller pistonrinro:

• rating: 98.7%
• city: Laguna Niguel, California
• # reviews: 224

shipping pistonrinro:

• type: Fixed
• class: Standard
• cost: $22.30
• service: FedEx Ground / FedEx Home Delivery
• transit: 3-6 Days
• carrier: FedEx

payments pistonrinro:

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