NISSAN 21499-9MB0B Seal Radiator Left

( Manufacturer Part Number: 21499-9MB0B ), ( Part Type: Seal Radiator ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Universal Fitment: Direct Replacement )

Review NISSAN Genuine Seal radiator Left hand

The **Nissan 21499-9MB0B Seal-Radiator (Left-Hand)** is a precision-engineered, high-performance cooling system component designed exclusively for select Nissan vehicles, ensuring optimal thermal regulation and long-term reliability under demanding driving conditions. This specialized seal-radiator assembly combines a durable, corrosion-resistant radiator core with a robust, leak-proof rubber seal that secures the radiator to the vehicle s engine bay, preventing coolant leaks and maintaining system integrity. Crafted from high-grade materials, the radiator core features a tightly packed array of aluminum fins and copper or brass tubes, engineered to maximize heat dissipation while minimizing airflow resistance, thereby enhancing engine efficiency and reducing the risk of overheating. The left-hand orientation of this component ensures seamless compatibility with Nissan models equipped with left-side radiator mounts, such as certain versions of the **Altima, Maxima, Frontier, or Pathfinder**, where space constraints or vehicle geometry dictate a left-hand installation. The seal itself is designed with a flexible yet resilient construction, providing a tight, vibration-dampening fit against the radiator s mounting surface, which helps mitigate stress from engine vibrations and road imperfections. This assembly is particularly critical for vehicles operating in extreme climates, high-altitude regions, or heavy-duty applications, where cooling system performance directly impacts engine longevity and overall vehicle performance. Whether used in a routine maintenance replacement or as part of a comprehensive cooling system upgrade, the **Nissan 21499-9MB0B Seal-Radiator (Left-Hand)** delivers a balance of durability, efficiency, and ease of installation, making it an indispensable component for maintaining peak cooling system functionality.

**Pros and Cons of buying a Nissan Part Number 21499-9MB0B (Seal Radiator, Left-Hand Drive)**

1. **OEM Quality** This is a genuine Nissan part, meaning it meets the manufacturer s specifications for fit, function, and durability. OEM parts are designed to integrate seamlessly with the vehicle s systems, reducing the risk of compatibility issues.

2. **Reliability** Nissan s radiator seals are engineered to withstand heat, pressure, and fluid exposure, which helps prevent leaks and overheating critical for engine longevity.

3. **Warranty Coverage** Purchasing from an authorized Nissan dealer or a reputable online retailer often includes a warranty (e.g., 12 60 months), providing peace of mind against premature failure.

4. **Preventative Maintenance** Replacing a worn seal proactively can avoid costly radiator or coolant system failures, which may require replacing the entire radiator, hoses, or even the water pump.

5. **Compatibility** This part is specifically designed for left-hand drive (LHD) Nissan vehicles, ensuring an exact fit without modifications.

6. **Ease of Installation** Radiator seals are relatively straightforward to replace, especially if the radiator is already removed. Many DIY mechanics can handle the job with basic tools.

7. **Long-Term Cost Savings** While the upfront cost may be higher than aftermarket alternatives, the reliability of an OEM seal can justify the expense over time by avoiding repeated repairs.

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1. **Higher Cost** OEM parts are typically more expensive than aftermarket alternatives. The price of this Nissan seal may range from $20 to $50 or more, depending on the source and vehicle model.

2. **Limited Availability** If purchasing from a dealer, stock may be limited, especially for older or discontinued models. Online retailers or specialty auto parts stores may have better availability but could charge premium prices.

3. **Potential Overkill for Minor Issues** If the seal failure is isolated (e.g., only one corner is leaking), some drivers might opt for a cheaper aftermarket seal or a temporary fix (e.g., radiator stop-leak) instead of replacing the entire seal.

4. **Installation Complexity** While the seal itself is simple, removing and reinstalling the radiator may require draining coolant, disconnecting hoses, and ensuring proper sealing. Inexperienced DIYers might struggle with this process.

5. **Counterfeit Risks** Purchasing from untrusted sellers (e.g., unlicensed online marketplaces) could result in counterfeit or low-quality parts that fail prematurely. Always buy from authorized dealers or verified suppliers.

6. **Environmental Concerns** Radiator seals contain materials that may not be easily recyclable, contributing to e-waste if not disposed of properly. However, this is a minor consideration compared to the functional impact.

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The Nissan part number **21499-9MB0B (Seal Radiator, LHD)** is a high-quality, reliable choice for maintaining or repairing a Nissan vehicle s cooling system. Its OEM status ensures compatibility, durability, and peace of mind, making it ideal for drivers who prioritize long-term performance and warranty coverage. However, the higher cost and potential complexity of installation may deter budget-conscious or inexperienced buyers.

For most cases especially in older or high-mileage vehicles where coolant system integrity is critical the benefits of an OEM seal outweigh the drawbacks. If cost is a major concern, a reputable aftermarket seal (e.g., from Denso, GMB, or ACDelco) could be a viable alternative, provided it meets the same specifications.

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- You want the most reliable and long-lasting solution.

- Your vehicle is under warranty or you value Nissan s support.

- You re comfortable with the higher cost and potential installation effort.

- You re replacing the seal as part of a full radiator service (e.g., coolant flush, hose replacement).

- You re on a tight budget and the seal failure is minor (e.g., a single leak point).

- You ve researched and selected a high-quality aftermarket brand with good reviews.

- You re confident in your ability to install the part correctly.

- **Authorized Nissan dealers** (for warranty coverage and authenticity).

- **Online retailers** like RockAuto, Amazon (verified sellers), or Nissan s official website.

- **Local auto parts stores** (e.g., AutoZone, O Reilly, Advance Auto) for convenience, though prices may vary.

- Drain the coolant system before removing the radiator.

- Inspect the radiator and hoses for additional wear before sealing.

- Use a radiator sealant (if recommended) to ensure a tight fit.

- Consider professional installation if unsure about the process.

**Final Verdict:** For most Nissan owners, the **21499-9MB0B seal is the best choice** for reliability and longevity, especially in vehicles where cooling system integrity is non-negotiable. Weigh the cost against the potential risks of aftermarket parts to make an informed decision.

Details:

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 #: 214999mb0b prices

• $26.18-$27.34

specifications ocoosys:

• for makes: Nissan
• mpn: 21499-9mb0b
• part type: Seal Radiator
• genuine oem: Yes
• manufacturer warranty: 1 Year
• universal fitment: Direct Replacement

general ocoosys:

• Car Truck Parts Accessories > Engine Cooling Components > Other Engine Cooling Components
• condition: New

offer ocoosys:

• quantity: 3
• started: February 26, 2026
• options: Ship-to-home
• availability: In Stock
• sold: 0

seller ocoosys:

• city: Fort Worth, Texas
• # reviews: 0
• rating: 0.0%

returns ocoosys:

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

payments ocoosys:

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

shipping ocoosys:

• transit: 5-11 Days
• type: Fixed
• cost: $24.41
• service: Standard
• class: Standard

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