BMW 11247558590 Pistons Connecting Rods Engine N51

( Manufacturer Part Number: 11247558590 ), ( Part Type: Piston Rod Engine ), ( Manufacturer Warranty: 1 Month ), ( Fitment Type: Direct Replacement ), ( Vintage Part: No ), ( Country Of Origin: Germany )

Review BMW Oem Pistons And Connecting Rods N51 Engine 7558590 fits E82 E88 E90 E92 E93

The **BMW 11247558590 Pistons and Connecting Rod Assembly** is a high-performance, precision-engineered component designed exclusively for the **N51 inline-6 engine**, found in BMW s **E82 (Z4), E88 (Z4 Roadster), E85 (Z4 Coupe), E86 (Z4 sDrive), E89 (X3), E90 (3 Series), E91 (3 Series Touring), E92 (3 Series Coupe), E93 (3 Series Cabriolet), and E96 (3 Series Sedan)** models. This aftermarket upgrade kit replaces the stock pistons and connecting rods, offering enhanced durability, improved power output, and better resistance to heat and mechanical stress critical for high-performance applications, forced induction builds, or extended engine life under aggressive driving conditions.

Crafted from **forged aluminum alloy**, these pistons feature a **honeycomb-style crown design** optimized for superior heat dissipation and reduced thermal expansion, minimizing the risk of warping or seizure common issues in high-RPM or turbocharged setups. The **low-friction piston rings** are precision-machined to ensure smooth operation while maintaining optimal compression and oil control, reducing friction losses and improving overall engine efficiency. Each piston is paired with a **high-strength, forged steel connecting rod** featuring **optimized wall thickness and balanced weight distribution**, enhancing rigidity and reducing bending stress under heavy loads. The rods are **case-hardened** for superior wear resistance, ensuring longevity even under extreme conditions, such as high boost pressures or aggressive tuning scenarios.

This kit is **fully compatible** with the N51 engine s bore size (84mm) and stroke (89mm), ensuring a perfect fit without requiring additional modifications. The **OEM-style bolt pattern** and **precision-machined rod journals** guarantee seamless integration with the crankshaft, while the **pre-lubricated rod bearings** simplify installation and reduce the risk of dry starts. Whether upgrading for **turbocharging, nitrous oxide (N2O) applications, or simply extending the engine s lifespan under heavy use**, these pistons and rods provide a robust foundation for increased power and reliability.

Built to **OEM-grade specifications** but with **enhanced performance characteristics**, this component is ideal for both **stock replacement** (if original parts are worn or damaged) and **high-performance modifications**. The kit is backed by **rigorous quality control**, ensuring each part meets BMW s exacting standards while delivering the strength and performance demanded by modern tuning enthusiasts. For those seeking a **direct bolt-on upgrade** without compromising on durability or power potential, the **BMW 11247558590 Pistons and Connecting Rod Assembly** represents a smart investment in engine longevity and performance.

### **Pros and Cons of Buying BMW N51 Pistons and Connecting Rods (Part Numbers: 11247558590, 7560131 for E82, E88, E90, E92, E93)**

1. **OEM Quality and Reliability** BMW s N51 engine components are designed to meet strict manufacturing standards, ensuring durability and performance close to the original specifications. Using genuine or high-quality aftermarket parts reduces the risk of premature failure compared to low-quality knockoffs.

2. **Compatibility with Common Modifications** The E82/E88/E90/E92/E93 platforms are popular for tuning, and these pistons and rods are compatible with common upgrades like forced induction (turbo/supercharger), high-flow heads, and performance camshafts. They can handle increased power levels when paired with proper oil and cooling solutions.

3. **Improved Strength and Longevity** The forged pistons (common in aftermarket options) and high-quality rods offer better resistance to heat, stress, and wear compared to cast pistons, extending engine life under aggressive driving conditions or modifications.

4. **Better Support for High-Performance Applications** If you plan to run the engine at higher RPMs or with forced induction, these components are a safer choice than stock parts, which may fail under excessive stress. They help prevent catastrophic engine damage (e.g., rod bolt failure, piston slap, or connecting rod bending).

5. **Easier Installation and Maintenance** Since these parts are designed for the N51, they fit standard engine builds without requiring major modifications. They also align with common service intervals, making maintenance predictable.

6. **Market Availability and Pricing** While not ultra-cheap, these components are widely available from reputable suppliers (e.g., BMW Performance Parts, JE, Forged Racing, or local specialists). Pricing varies, but they are generally more affordable than full engine rebuilds or replacements.

7. **Potential for Increased Power Output** When combined with other upgrades (e.g., upgraded crankshaft, stronger oil pump, and proper lubrication), these parts can support power levels well above stock (e.g., 300 hp with a turbocharged N51). This makes them a smart investment for enthusiasts.

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1. **Cost** High-quality pistons and rods are not inexpensive. A full set (pistons rods) can range from **$800 $2,500 **, depending on brand (e.g., Forged Racing, JE, or BMW OEM). This is a significant upfront investment, especially for stock or lightly modified engines.

2. **Installation Complexity** While not overly difficult, rebuilding an engine with new pistons and rods requires precision. Mistakes in assembly (e.g., incorrect rod bearing clearance, improper piston-to-wall clearance, or torque specs) can lead to catastrophic failure. This may necessitate professional installation, adding labor costs.

3. **Potential for Overkill on Stock Engines** If you re not planning significant modifications (e.g., forced induction, aggressive camshafts, or high RPM use), these parts may be unnecessary. Stock N51 engines are robust but can last well over 200,000 miles with basic maintenance. Upgrading prematurely adds cost without immediate benefit.

4. **Oil and Cooling Requirements** Higher-performance pistons and rods demand better lubrication and cooling. Running a **full synthetic oil (e.g., Motul, Liqui Moly, or BMW LL-04)** and ensuring proper oil flow (e.g., upgraded oil pump, cooler) is critical. Neglecting this can reduce their lifespan or cause premature wear.

5. **Risk of Incompatibility with Cheap Mods** If you pair these parts with low-quality aftermarket components (e.g., cheap turbo, poor-quality intake manifolds, or mismatched camshafts), the engine s performance and reliability may suffer. It s essential to balance upgrades holistically.

6. **Time-Consuming Rebuild Process** A full rebuild with new pistons and rods typically requires **40 80 hours of labor**, depending on the scope. This means downtime for your vehicle, which can be inconvenient for daily drivers.

7. **Warranty and Return Risks** If purchased from a non-reputable seller, there s a risk of receiving counterfeit or substandard parts. Always buy from trusted suppliers (e.g., BMW dealers, specialty shops, or well-reviewed online retailers) to avoid this issue.

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- Run forced induction (turbo/supercharger) or aggressive camshafts.

- Push the engine beyond stock power levels (e.g., 300 hp).

- Extend the engine s lifespan under high-stress conditions.

- Avoid the risk of catastrophic failure from stock components.

However, if your engine is **stock or lightly modified**, these upgrades may be **overkill and unnecessary**, leading to wasted money. In such cases, focusing on **proper maintenance (oil changes, cooling system checks, and avoiding excessive RPMs)** may suffice.

For **high-mileage or heavily modified N51 engines**, these parts are **highly recommended** to prevent rod bolt failure, piston damage, or connecting rod bending common failure points in turbocharged or overstressed engines.

---

- Are you running a **stock or mildly modified N51**? If so, prioritize maintenance over premature upgrades.

- Do you plan **forced induction or high-RPM use**? If yes, these pistons and rods are **essential** for safety and longevity.

- Opt for **forged pistons (e.g., Forged Racing, JE)** and **high-quality rods** rather than cast or unknown brands.

- Ensure compatibility with your **crankshaft, oil pump, and cooling system**.

- If you lack experience, **have a reputable BMW specialist or engine builder** perform the installation to avoid mistakes.

- Upgrade your **oil pump, oil cooler, and lubrication system** to match the new components.

- Consider a **stiffer crankshaft** if running extreme power levels.

- If you re on a tight budget, prioritize **one critical component at a time** (e.g., rods first, then pistons later).

- Compare quotes from multiple suppliers to ensure you re getting a fair price.

For **serious N51 enthusiasts or those running forced induction**, these pistons and rods are a **worthwhile upgrade** that significantly improves reliability and power potential. For **stock or casual drivers**, they may not be necessary unless you re approaching high mileage or encountering engine issues. Always weigh the cost against your specific goals before purchasing.

Details:

2007-2013 BMW 328i Coupe N51, E92. Manual or Automatic transmission Engine size. Part fitment will vary due to several different factors: The vehicles build date month year. 2008 2013 BMW 128i Coupe N51, E82.

2007-2013 BMW 328i Convertible N51, E93. OEM Genuine BMW Set of 6 engine pistons and connecting rods.No defects found in great working condition. Electric/Manual, Leather/Vinyl, Sport/Standard etc. Sedan, Convertible, Wagon or Coupe.

Multiple quantity items may vary slightly depending on stock hand, but will always be the same quality or better than pictured.

part #: 11247558590 prices

• $41.79-$159.15

specifications pistonrinro:

• for models: E82, E88, E90, E92, E93
• for makes: Bmw
• mpn: 11247558590
• part type: Piston Rod Engine
• manufacturer warranty: 1 Month
• fitment type: Direct Replacement
• vintage part: No
• country of origin: Germany

payments pistonrinro:

• credit card: Mastercard
• other
• wallet: Paypal

offer pistonrinro:

• quantity: 1
• availability: In Stock
• sold: 0
• options: Ship-to-home
• started: February 27, 2026
• best offers: True

returns pistonrinro:

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

general pistonrinro:

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

shipping pistonrinro:

• type: Fixed
• cost: $25.00
• transit: 4-8 Days
• service: USPS Ground Advantage
• carrier: USPS
• class: Standard

seller pistonrinro:

• rating: 99.8%
• city: Athol, Idaho
• # reviews: 13582

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