LUCAS 54579801 Front Left Marker Lens

( Brand: Lucas ), ( Manufacturer Part Number: 54579801 ), ( Part Type: Len ), ( Lens Color: Amber ), ( Vintage Part: Yes ), ( Placement On Vehicle: Left, Front )

Review LUCAS Triumph Genuine Front Left Side Marker Lens fits TR6 1969–1976

The **Lucas 54579801 Triumph TR6 Front Left Marker Lens** is a meticulously crafted, high-quality replacement part designed to restore both the aesthetic and functional integrity of your classic Triumph TR6, spanning the production years from 1969 to 1976. This lens serves as the left-hand marker light assembly, a critical component for visibility and compliance with road safety regulations, ensuring your vehicle meets modern lighting standards while preserving its vintage charm. Crafted from durable, transparent polycarbonate, the lens is engineered to resist yellowing, cracking, or environmental degradation over time, maintaining clarity and brightness even under prolonged exposure to sunlight, rain, or extreme temperatures. The design adheres to the original specifications of the TR6, featuring a sleek, angular shape that seamlessly integrates with the car s iconic front end, blending modern reliability with retro authenticity. Inside, the lens houses a robust internal reflector and lens assembly, optimized to project a crisp, well-defined marker light beam that enhances nighttime visibility without overwhelming other drivers. Compatible with the Triumph TR6 s original wiring and mounting system, this replacement lens is a plug-and-play solution, requiring minimal installation effort while ensuring a secure, long-lasting fit. Whether you re restoring a showroom-worthy classic or maintaining a daily-driven TR6, the Lucas 54579801 is an indispensable upgrade, combining precision engineering with timeless design to keep your vehicle s front end both functional and visually striking.

### **Pros and Cons of Buying a Lucas 54579801 Triumph TR6 Front Left Marker Lens (1969 1976)**

1. **Authentic Fitment** This part is specifically designed for the Triumph TR6, ensuring a perfect fit without modifications. It matches the original styling of the vehicle, preserving its classic look.

2. **High-Quality Material** Lucas is a well-known manufacturer of automotive lighting components, and this lens is likely made from durable polycarbonate or glass, depending on the model. It should provide clear visibility and longevity if properly maintained.

3. **Easy Installation** As a direct replacement, it should be straightforward to install, requiring minimal tools and no major modifications to the existing wiring or housing.

4. **Availability of Replacement Parts** Since Lucas produces aftermarket automotive parts, finding additional bulbs, wiring, or related components should be relatively easy.

5. **Cost-Effective Solution** Compared to sourcing an original Triumph part, this aftermarket lens is often more affordable while still meeting functional requirements.

6. **Compatibility with Modern Bulbs** Depending on the lens type, it may be compatible with modern halogen or LED bulbs, offering better visibility than the original bulb it replaces.

1. **Potential Quality Variations** While Lucas is a reputable brand, there is a chance of receiving a lower-quality version if purchasing from a third-party seller. Always verify the seller s reputation.

2. **Possible Clear Coating Issues** Some aftermarket lenses may have a less durable or inferior clear coating compared to original parts, leading to fogging or yellowing over time.

3. **Bulb Compatibility Concerns** If the lens is designed for an older bulb type (e.g., a small incandescent bulb), you may need to source a specific bulb, which could be harder to find than modern alternatives.

4. **Wiring or Housing Wear** If the surrounding wiring harness or lens housing is damaged, replacing just the lens may not fully restore functionality. A full inspection of the assembly is recommended.

5. **Limited Customization** Unlike some modern aftermarket lenses, this part is not designed for color changes or additional features (e.g., LED conversion kits), limiting customization options.

6. **Potential for Counterfeit Parts** If buying from an unverified source, there is a risk of receiving a fake or poorly made replica that fails prematurely.

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### **Conclusion**

The Lucas 54579801 front left marker lens is a practical and cost-effective choice for restoring or maintaining a Triumph TR6 from 1969 1976. It offers a direct replacement with minimal hassle, ensuring the vehicle retains its original aesthetic while improving functionality. However, buyers should exercise caution when purchasing verifying the seller s authenticity and inspecting the part for quality before installation is crucial.

If the lens is in good condition and sourced from a trusted supplier, it is a reliable upgrade. For those seeking higher-end performance, pairing it with a modern bulb (if compatible) could further enhance visibility. Overall, this part strikes a balance between affordability and functionality, making it a solid recommendation for classic car enthusiasts.

Proceed with purchasing the Lucas 54579801 lens if you prioritize authenticity, ease of installation, and cost efficiency. Ensure the part is new and from a reputable seller, and inspect the surrounding wiring and housing for any signs of wear. For added peace of mind, consider pairing it with a high-quality bulb to maximize performance. This choice is well-suited for both restoration projects and routine maintenance.

Details:

Imperfections are shown as best possible. Triumph TR6 1969-1976 Genuine LUCAS Original LEFT Front Side Marker Lens, 54579801. Message with any questions. Very good used original not a reproduction condition.

Includes original chrome surround and interior reflector.

part #: 54579801 prices

• $36.09-$274.98

specifications sidemarkeligh:

• for models: Tr6
• for makes: Triumph
• for years: 1969-1976
• brand: Lucas
• mpn: 54579801
• part type: Len
• lens color: Amber
• vintage part: Yes
• placement on vehicle: Left, Front

payments sidemarkeligh:

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

general sidemarkeligh:

• Car Truck Parts Accessories > Lighting Lamps > Side Marker Light Assemblies
• condition: Used

offer sidemarkeligh:

• sold: 0
• availability: In Stock
• started: March 5, 2026
• options: Ship-to-home
• quantity: 1

shipping sidemarkeligh:

• class: Standard
• transit: 4-9 Days
• carrier: USPS
• cost: $6.22
• service: USPS Ground Advantage
• type: Calculated

returns sidemarkeligh:

• time: 14 Days
• paid by: Buyer
• policy: Returns Accepted

seller sidemarkeligh:

• city: Bradford, Vermont
• rating: 99.5%
• # reviews: 261

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