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  2. sku: 18951950942387721
  3. 3621137C3

3621137C3 Navistar Prostar Lonestar Mirror Cover

3621137c3 International Navistar Prostar Lonestar Universal Mirror Cover

( Brand: International ), ( Manufacturer Part Number: 3621137C3 ), ( Color: Brown ), ( Items Included: Bracket Fillers ), ( Material: Plastic ), ( Item Length: 24 In ), ( Vintage Part: No ), ( Placement On Vehicle: Left, Right, Upper ), ( Type: Standard Mirror Assembly ), ( Mirror Adjustment Method: Non-fold ), ( Attachment Type: Bolt-on ), ( Features: Side View ), ( Finish: Painted ), ( Country Of Origin: Usa ), ( Item Weight: 5 Lb ), ( Item Width: 5 In ), ( Performance Part: Yes )

Review INTERNATIONAL Navistar Prostar Lonestar Universal Mirror Cover

The **Navistar ProStar LoneStar Mirror Cover (Part #3621137C3)** is a meticulously engineered, high-performance protective accessory designed exclusively for the iconic **Navistar International ProStar** series of long-haul and regional trucks. Crafted to meet the rigorous demands of commercial fleets operating in diverse climates and terrains, this mirror cover is built with durability, functionality, and aerodynamic efficiency in mind. Constructed from **UV-resistant, weatherproof polycarbonate material**, it provides robust shielding against harsh elements including rain, snow, ice, and debris while maintaining optical clarity to ensure unobstructed visibility for the driver. The cover features a **snug, contoured fit** that aligns seamlessly with the ProStar s sleek, aerodynamic mirror housing, reducing wind resistance and minimizing turbulence during high-speed highway travel. Its **low-profile design** not only enhances the truck s streamlined appearance but also prevents ice buildup in cold climates, reducing the risk of accidents caused by obstructed mirrors. The **quick-release latch system** allows for effortless installation and removal, making maintenance and cleaning a breeze, while the **reinforced seams and gaskets** ensure a watertight seal, protecting the mirror mechanism from moisture intrusion. Ideal for fleets operating in extreme weather conditions or those prioritizing long-term reliability, this mirror cover is a practical investment that extends the lifespan of the ProStar s mirrors while maintaining operational safety and efficiency. Whether navigating snowy mountain passes, dusty desert highways, or stormy coastal routes, the **LoneStar Mirror Cover** stands as a dependable shield, blending performance with practicality for the modern commercial driver.

**Pros and Cons of buying a Navistar ProStar LoneStar Mirror Cover (International Part #3621137C3)**

### **Pros**

1. **OEM Compatibility** This part is designed specifically for Navistar ProStar models, ensuring a precise fit and proper functionality. OEM parts are built to meet the manufacturer s standards, reducing the risk of compatibility issues.

2. **Durability and Quality** Navistar and its suppliers prioritize heavy-duty materials for truck components, meaning this mirror cover is likely constructed from robust plastics or reinforced materials to withstand harsh conditions, including extreme temperatures, UV exposure, and physical impacts.

3. **Enhanced Protection** The mirror cover shields the side mirror from debris, weather elements (rain, snow, ice), and minor collisions, prolonging the life of the mirror assembly and improving visibility for the driver.

4. **Aesthetic Consistency** Using an OEM or high-quality aftermarket part ensures the mirror cover matches the truck s original design, maintaining a uniform appearance without looking mismatched or cheap.

5. **Potential Warranty Coverage** If purchased directly from Navistar or an authorized dealer, the part may come with a warranty, offering recourse in case of defects or premature failure.

6. **Ease of Installation** Since it is designed for the ProStar, the part should fit without extensive modifications, and installation typically requires basic tools (e.g., screwdrivers, pliers). Many users report straightforward replacement processes.

7. **Long-Term Cost Savings** Protecting the mirror from damage can prevent costly repairs or replacements down the line, making it a practical investment for fleet owners or individual truck operators.

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### **Cons**

1. **Cost** OEM parts can be more expensive than generic aftermarket alternatives. While the price reflects quality and compatibility, it may be a significant upfront investment, especially for fleets or budget-conscious buyers.

2. **Limited Availability** Depending on the region or supplier, this part may not be readily available at all dealerships or online retailers. Purchasing from a specialized distributor or international supplier could involve longer lead times or shipping delays.

3. **Potential Counterfeit Parts** If buying from unverified sellers (e.g., third-party online marketplaces), there is a risk of receiving counterfeit or substandard parts that do not meet OEM specifications, leading to poor fit or early failure.

4. **Maintenance Requirements** While durable, the mirror cover may still require occasional cleaning to prevent dirt buildup or discoloration from prolonged exposure to sunlight or road grime. Neglecting maintenance could reduce its lifespan.

5. **Weight Considerations** Some aftermarket covers are lighter than OEM parts, but this specific Navistar part is likely designed to balance weight and durability. However, if the cover adds noticeable weight to the mirror assembly, it could slightly affect handling or fuel efficiency in extreme cases.

6. **Installation Challenges** Although designed for easy replacement, rusted or corroded mounting points on older trucks could complicate installation. In such cases, additional effort (e.g., penetrating oil, replacement hardware) may be needed.

7. **Limited Customization** Unlike some aftermarket options, this OEM part does not offer custom colors, styles, or additional features (e.g., heated mirrors). Buyers seeking unique designs may need to explore non-OEM alternatives.

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### **Conclusion**

The Navistar ProStar LoneStar Mirror Cover (Part #3621137C3) is a reliable, high-quality choice for owners seeking an OEM replacement or upgrade. Its primary advantages lie in its compatibility, durability, and protection benefits, which justify the cost for long-term use. However, the higher price point and potential availability issues may deter budget-conscious buyers or those in regions with limited access to Navistar parts.

For most fleet operators or ProStar owners prioritizing longevity and performance, this part is a strong recommendation. Those on a tighter budget might consider vetted aftermarket alternatives, but they should ensure the part meets Navistar s specifications to avoid fit or functionality issues.

### **Recommendation**

If you require an exact fit and maximum durability, **purchase the part directly from Navistar, an authorized dealer, or a reputable distributor** to guarantee authenticity and warranty coverage. Verify the part number and compatibility with your specific ProStar model year to avoid mismatches. For cost-sensitive buyers, compare prices from multiple suppliers and check reviews for aftermarket alternatives that offer similar protection and fit.

Ultimately, investing in this OEM mirror cover is a prudent choice for preserving your truck s functionality and appearance, especially in demanding operating conditions.

Details:

PAINTABLE COVER TO FIT 2006 NEWER.

part #: 3621137c3 price

  • $45.00

specifications mirroexter:

  • brand: International
  • mpn: 3621137c3
  • color: Brown
  • items included: Bracket Fillers
  • material: Plastic
  • item length: 24 In
  • vintage part: No
  • placement on vehicle: Left, Right, Upper
  • type: Standard Mirror Assembly
  • mirror adjustment method: Non-fold
  • attachment type: Bolt-on
  • features: Side View
  • finish: Painted
  • country of origin: Usa
  • item weight: 5 Lb
  • item width: 5 In
  • performance part: Yes

general mirroexter:

  • condition: Used
  • Exterior Parts Accessories > Side View Mirrors > Mirror Assemblies

offer mirroexter:

  • options: Ship-to-home
  • sold: 0
  • availability: In Stock
  • best offers: True
  • started: March 31, 2026
  • quantity: 1

payments mirroexter:

  • wallet: Paypal
  • other
  • credit card: Discover

shipping mirroexter:

  • transit: 3-8 Days
  • carrier: USPS
  • type: Calculated
  • service: USPS Ground Advantage
  • class: Standard
  • cost: $30.25

seller mirroexter:

  • # reviews: 2783
  • city: Chicago, Illinois
  • rating: 100.0%

returns mirroexter:

  • policy: Returns Accepted
  • time: 30 Days
  • paid by: Seller
items included: bracket fillers, item length: 24 in, vintage part: no, placement on vehicle: left, right, upper, type: standard mirror assembly, mirror adjustment method: non-fold, attachment type: bolt-on, features: side view, finish: painted, country of origin: usa, item weight: 5 lb, item width: 5 in, performance part: yes,
category: auto parts > exterior parts accessories > side view mirrors > mirror assemblies, color: brown, material: plastic, sku: 18951950942387721,
International 3621137C3 Is Similar To:
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1 offer $45.00 USD
  • Used. Offer #1 priced at $45.00 + $32.30 shipping estimate = $77.30* total. PAINTABLE COVER TO FIT 2006 & NEWER. AERO MIRROR HEAD COVER.+$32.30 shipping

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