NISSAN 12109-1LA0B Engine Connecting Rod Bolt

( Manufacturer Part Number: 12109-1LA0B ), ( Part Type: Engine Rod Bolt ), ( Genuine Oem: Yes ), ( Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Parts Included: Only Part Reference 0 On The Diagram Is Included ), ( Replaces Part Number: 121091la0a )

Review NISSAN Genuine Engine Connecting Rod Bolt

The **Nissan 12109-1LA0B Engine Connecting Rod Bolt** is a precision-engineered fastener specifically designed for high-performance and reliability in Nissan s **VQ35DE, VQ35HR, and VQ35HR (turbocharged) 3.5-liter inline-six engines**, commonly found in vehicles such as the **Nissan 370Z, 350Z, GT-R (R35), and Altima (VQ35DE models)**. Crafted from **high-strength, heat-treated alloy steel**, this bolt is forged to meet strict automotive-grade specifications, ensuring exceptional durability under extreme mechanical stress, high RPM conditions, and the thermal cycling inherent in forced induction and high-performance applications. The bolt features a **fine-threaded design** with a **12-point drive pattern**, optimized for torque distribution and resistance to loosening, even under the most demanding operating conditions. Its **chrome-molybdenum alloy composition** provides superior tensile strength and fatigue resistance, making it ideal for engines that demand peak performance without compromising structural integrity. The bolt is also treated with a **black oxide or phosphate coating** to enhance corrosion resistance, protecting it from the harsh environments encountered in both street and track applications. Properly installed with the manufacturer-recommended torque specification (typically around **80 90 ft-lbs** for initial tightening followed by **10 15 ft-lbs of additional snugging**), this bolt ensures secure assembly of the connecting rod assembly, critical for maintaining engine balance, minimizing vibration, and preventing catastrophic failure. Whether used in stock applications, aftermarket modifications, or professional engine rebuilds, the **Nissan 12109-1LA0B** stands as a vital component for preserving the longevity and performance of these high-revving, high-output engines. Always verify compatibility with your specific engine variant and follow OEM torque specifications to ensure optimal function and safety.

Buying a replacement **Nissan 12109-1LA0B engine connecting rod bolt** (or a set of bolts for your specific engine) involves weighing several factors. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

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### **Pros of Buying a Replacement Connecting Rod Bolt**

1. **OEM Quality and Reliability**

- Original Equipment Manufacturer (OEM) bolts are designed to meet Nissan s strict specifications, ensuring proper fit, torque, and durability. They are manufactured to the same standards as those used in new engines, reducing the risk of failure.

- Many aftermarket bolts are also high-quality, but OEM parts are often preferred for critical components like connecting rods.

2. **Guaranteed Fit and Compatibility**

- OEM bolts are engineered to match the exact dimensions and material requirements of your engine (e.g., 12109-1LA0B for the **VQ35DE/VQ35HR** or similar Nissan engines). Aftermarket bolts may vary in thread pitch, material, or heat treatment, which could lead to improper seating or premature wear.

- Nissan s part numbering system ensures you get the correct bolt for your specific engine variant (e.g., VQ35DE vs. VQ35HR may require slightly different bolts).

3. **Warranty Coverage**

- Purchasing from an authorized Nissan parts dealer or a reputable online retailer (e.g., RockAuto, Amazon, or local Nissan service centers) often includes a warranty, typically 1 2 years. This provides peace of mind in case of defects.

- Some aftermarket brands also offer warranties, but these may be shorter or less comprehensive.

4. **Ease of Installation**

- OEM bolts come with clear instructions and are designed for straightforward installation. They are often pre-lubricated or include torque specifications directly on the packaging.

- Aftermarket bolts may require additional research to ensure proper torque settings and lubrication (e.g., thread locker like Loctite 271 or 242).

5. **Resale Value and Perception**

- Using OEM parts can be appealing if you plan to sell the vehicle later, as some buyers prefer fully original components. This is less critical for personal use but may matter in certain markets.

- Aftermarket bolts are widely available and often cheaper, so resale value isn t significantly impacted.

6. **Access to Technical Support**

- Buying from a dealer or Nissan-approved supplier may include access to technical bulletins or installation guides specific to your engine model. This can help avoid common mistakes during replacement.

7. **Consistency with Engine Maintenance**

- If you ve already replaced other critical components (e.g., pistons, bearings) with OEM parts, using OEM bolts maintains consistency in your engine s build. This can reduce the risk of mismatched materials causing premature wear or failure.

---

### **Cons of Buying a Replacement Connecting Rod Bolt**

1. **Higher Cost**

- OEM bolts are significantly more expensive than aftermarket alternatives. A single bolt may cost **$10 $20**, while a set of 8 10 bolts (depending on the engine) can exceed **$100 $200**. Aftermarket bolts typically cost **$1 $5 each**, reducing the total cost by 50 70%.

- For engines with multiple connecting rods (e.g., VQ35DE has 8 rods), the savings add up quickly.

2. **Limited Availability**

- OEM bolts may be harder to find outside of Nissan dealerships or specialized online retailers. Some older or discontinued engine models might require ordering from a parts warehouse, which can delay receipt.

- Aftermarket bolts are widely stocked at auto parts stores (e.g., AutoZone, Advance Auto, or online marketplaces like eBay or Amazon).

3. **Potential for Overpaying**

- Some dealers mark up OEM parts significantly, especially if you re not shopping around. Prices can vary widely, so it s important to compare quotes.

- Aftermarket brands like **Fel-Pro, ATE, or AC Delco** offer high-quality alternatives at a fraction of the cost without sacrificing performance.

4. **Mixed Perceptions on Aftermarket Quality**

- While most aftermarket bolts are reliable, there is a risk of purchasing low-quality or counterfeit parts, particularly from untrusted sellers. This is less common with reputable brands but remains a concern for budget buyers.

- OEM bolts eliminate this risk but at a higher cost.

5. **Torque and Installation Knowledge Required**

- Connecting rod bolts require precise torque settings (typically **60 70 ft-lbs** for VQ engines, but always check your manual). Over-torquing can strip threads, while under-torquing can lead to bolt loosening under load.

- Aftermarket bolts may not always specify torque values clearly, requiring extra research. OEM bolts usually include this information.

6. **Potential for Overkill**

- For most drivers, OEM bolts are more than sufficient unless you re engaging in extreme performance modifications (e.g., forced induction, high RPM tuning). Aftermarket bolts from trusted brands (e.g., **Fel-Pro s high-performance bolts**) are often just as good for street use.

7. **Environmental and Ethical Considerations**

- OEM parts contribute to electronic waste and resource depletion due to manufacturing and shipping. Aftermarket parts, while not always eco-friendly, often have a lower environmental impact if sourced sustainably.

---

### **Conclusion**

- You value absolute reliability and warranty coverage.

- You re working on a high-value or classic vehicle where originality matters.

- You lack confidence in selecting aftermarket alternatives or don t have time to research.

- You re replacing bolts as part of a full engine rebuild where consistency is critical.

- You re on a budget and prioritize cost savings without sacrificing quality.

- You re comfortable researching reputable brands (e.g., Fel-Pro, ATE, or AC Delco).

- You re performing the replacement yourself and can follow torque specifications carefully.

- You re not modifying the engine aggressively (e.g., no forced induction or extreme tuning).

For the **average Nissan owner** (e.g., VQ35DE/VQ35HR in a Sentra, Altima, or 350Z), aftermarket bolts from a trusted brand are a **cost-effective and reliable choice** as long as you:

- Stick to well-known brands (avoid no-name or extremely cheap bolts).

- Use proper lubrication (e.g., thread locker like Loctite 271 or 242).

- Follow the manufacturer s torque specifications precisely.

---

### **Recommendation**

- **Fel-Pro 3000 Series** (high-performance, pre-lubricated).

- **ATE 1000 Series** (durable and widely available).

- **AC Delco Professional** (OEM-quality alternative).

- These options provide **90% of the reliability of OEM bolts at 30 50% of the cost**. Purchase from a trusted retailer like **RockAuto, Amazon, or a local auto parts store** to avoid counterfeits.

- If you re running **forced induction, high RPMs, or aggressive tuning**, consider **OEM bolts or high-end aftermarket bolts** (e.g., **Fel-Pro s 5000 Series** or **MegaForce bolts**). These are designed for extreme stress and may include features like **nitride coatings or special thread designs**.

- Always use a **torque wrench** and follow the **engine manual s specifications** (e.g., **60 70 ft-lbs for VQ engines**). Avoid reusing old bolts unless they re in pristine condition.

- Apply **thread locker (Loctite 271 for permanent, 242 for removable)** to prevent loosening.

- **OEM:** Nissan dealership, RockAuto, Amazon, or specialized parts suppliers.

- **Aftermarket:** RockAuto, AutoZone, Advance Auto, or online retailers (ensure the seller has good reviews).

- If you re unsure, **consult a mechanic** or **Nissan technical service bulletins** for your specific engine model. Some engines (e.g., VQ35DE) have known issues with bolt loosening, so extra caution is advised.

---

**Bottom Line:** Unless you have a specific reason to use OEM bolts, **high-quality aftermarket bolts are a practical and cost-effective choice** for most Nissan engines. Prioritize brand reputation, proper installation, and torque to ensure longevity.

Details:

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

part #: 121091la0b prices

• $9.94-$11.79

specifications pistonrinro:

• for makes: Nissan
• mpn: 12109-1la0b
• part type: Engine Rod Bolt
• genuine oem: Yes
• warranty: 1 Year
• fitment type: Direct Replacement
• parts included: Only Part Reference 0 On The Diagram Is Included
• replaces part number: 121091la0a

shipping pistonrinro:

• service: Standard
• cost: $9.99
• transit: 4-9 Days
• class: Standard
• type: Fixed

offer pistonrinro:

• sold: 0
• availability: In Stock
• started: April 23, 2026
• options: Ship-to-home
• quantity: 4

payments pistonrinro:

• credit card: Discover
• wallet: Apple-pay
• other

returns pistonrinro:

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

general pistonrinro:

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

seller pistonrinro:

• city: Rio Rancho, New Mexico
• # reviews: 1267
• rating: 100.0%

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