1. Lighting Auto Parts For Sale
  2. sku: 10938032726813892
  3. PETERBILT 2647414

PETERBILT 2647414 Tail Light Wa 40874 579

fits make: Peterbilt. year: 2020.

2647414 Replaces 40874 2020 Peterbilt 579 Tail Light Wa

( Manufacturer Part Number: 2647414 ), ( Part Type: Light ), ( Color: 2 Red 1 White ), ( Oem Part Number: 40874 )

Review PETERBILT Replaces 579 Tail Light Wa fits 2020

The **Peterbilt Model 579 (VIN 2647414 40874 2020) Tail Light Assembly** is a precision-engineered, high-performance lighting component designed exclusively for the iconic 2020 Peterbilt 579 semi-truck, a model renowned for its durability, aerodynamic efficiency, and cutting-edge commercial trucking capabilities. This tail light assembly represents the pinnacle of automotive lighting technology, combining robust construction with advanced optical engineering to ensure optimal visibility, compliance with stringent transportation regulations, and long-term reliability in demanding on-road and off-road conditions. Crafted from high-grade, impact-resistant polycarbonate lenses, the assembly is engineered to withstand extreme temperatures, harsh weather elements, and the constant vibrations inherent to heavy-duty trucking, while maintaining a sleek, aerodynamic profile that complements the 579 s signature design. The housing features a rugged, corrosion-resistant metal frame, often treated with a protective coating to guard against rust and abrasion, ensuring longevity even in the most challenging environments. Inside, a sophisticated wiring harness connects seamlessly to the truck s electrical system, incorporating high-quality, heat-resistant connectors and insulated cables to prevent signal interference and ensure consistent performance over thousands of miles.

This tail light assembly incorporates **LED or high-intensity incandescent bulbs**, depending on the specific configuration, delivering superior illumination with enhanced brightness, energy efficiency, and a longer operational lifespan compared to traditional lighting solutions. The optical design features precision-molded reflectors and diffusers that maximize light distribution, ensuring that the truck s rear markers, stop signals, and turn indicators are clearly visible from multiple angles critical for safety during nighttime driving, low-visibility conditions, or in heavy traffic. The assembly also adheres to **FMVSS (Federal Motor Vehicle Safety Standard) and DOT compliance requirements**, guaranteeing that it meets or exceeds all regulatory standards for truck lighting, including proper color coding, signal clarity, and mounting specifications. For added functionality, some variants may include **smart lighting features**, such as automatic brightness adjustment or diagnostic indicators that alert the driver to potential electrical issues, further enhancing both safety and convenience.

Beyond its technical specifications, the **2020 Peterbilt 579 Tail Light Assembly** embodies the brand s commitment to innovation and driver-centric design. Its streamlined aesthetics align with the 579 s modern, aerodynamic cab, ensuring a cohesive look while maintaining the truck s imposing yet refined presence on the road. Whether installed on a regional haul truck, a long-haul rig, or a specialized commercial vehicle, this tail light assembly serves as a testament to Peterbilt s legacy of building trucks that balance power, precision, and performance. For fleet operators, mechanics, or enthusiasts seeking a direct-fit, high-quality replacement or upgrade, this component is an essential investment in maintaining the 579 s reputation for reliability and excellence in the demanding world of commercial transportation.

### **Pros and Cons of Buying a 2020 Peterbilt Model 579 (VIN: 2647414408742020) with Tail Light Issue**

#### **Pros**

1. **Reliability and Build Quality** Peterbilt trucks are known for their durability and strong aftermarket support. The 2020 model features modern engine options (such as the Cummins X15 or Caterpillar C13) that are well-regarded for longevity, especially with proper maintenance.

2. **High Resale Value** Peterbilt maintains strong resale value compared to some competitors, meaning you may recover more of your investment if you sell or trade it in later.

3. **Advanced Technology** The 2020 model includes modern features like:

- **Eldo 2.0** (if equipped) for compliance with ELD regulations.

- **Advanced driver aids** (if available) such as collision mitigation, lane departure warning, and adaptive cruise control.

- **Digital driver s manual** and onboard diagnostics for easier troubleshooting.

- **Improved cab comfort** with better ergonomics, climate control, and seating options.

4. **Fuel Efficiency Improvements** Later-model Peterbilt 579s (including 2020) benefit from aerodynamic refinements and optimized drivetrains, which can improve MPG compared to older models.

5. **Strong Aftermarket Support** Peterbilt has a vast network of dealerships, parts suppliers, and independent mechanics, making repairs and maintenance more accessible.

6. **Potential for Customization** The 579 is a popular model for customization, allowing for upgrades like heavy-duty suspension, premium audio, or enhanced cargo handling systems.

7. **Lower Hourage (If Available)** If this truck has relatively low hours (depending on the seller s history), it may still have significant life left, reducing long-term replacement costs.

---

#### **Cons**

1. **Tail Light Issue (VIN-Specific Concern)** The most immediate drawback is the reported tail light problem. This could indicate:

- **Electrical wiring faults** (common in older or poorly maintained trucks).

- **Bulb or housing failure** (if it s a simple replacement issue).

- **DMV or inspection compliance risk** Some states require functional tail lights for registration or inspections. If this is unresolved, the truck may fail inspections or require costly repairs to pass.

- **Safety hazard** Non-functional tail lights reduce visibility and increase accident risk.

**Mitigation:** Before purchasing, verify:

- Whether the issue is a **bulb replacement** (cheap fix) or a **wiring/electrical problem** (more expensive).

- If the seller has already addressed it or if it s a known issue in this VIN.

- Whether the truck has passed recent inspections.

2. **Potential Hidden Maintenance Costs** Even if the tail light is the only known issue, a 2020 Peterbilt may still require:

- **Regular oil changes and filter upgrades** (especially for Cummins/Caterpillar engines).

- **Transmission maintenance** (some owners report higher costs for Allison or Voith transmissions).

- **Suspension and brake upgrades** if the truck has seen heavy use.

3. **Depreciation** While Peterbilt holds value well, a used truck (even a 2020 model) will still depreciate. If you plan to keep it long-term, factor in residual value.

4. **Driver Comfort Variability** Some owners report that the 579 s cab, while improved, can still be **tight for taller drivers** or lack premium features (e.g., heated seats, premium audio) unless upgraded.

5. **Fuel and Insurance Costs** Heavy-duty diesel trucks have high fuel consumption and insurance premiums, especially if used for long-haul or high-risk routes.

6. **Potential for Undisclosed Issues** Without a **pre-purchase inspection (PPI)**, you risk hidden problems such as:

- **Exhaust or emissions system failures** (if not properly maintained).

- **Transmission or drivetrain wear** (check fluid levels and history).

- **Frame or structural damage** (inspect for rust, dents, or welds).

---

### **Conclusion**

Buying a **2020 Peterbilt 579 with a tail light issue** can be a **good investment** if:

- The tail light problem is **minor and easily fixable** (e.g., bulb replacement or wiring repair).

- The truck has **low hours, a clean maintenance history, and passes a thorough inspection**.

- You are **prepared for potential future maintenance costs** (engine, transmission, brakes).

- You **negotiate a fair price** (accounting for the tail light issue and any other wear).

However, it may **not be worth it** if:

- The tail light issue is part of a **larger electrical or wiring problem**.

- The seller **cannot provide full service records**, raising concerns about hidden damage.

- You **cannot afford unexpected repairs** (e.g., a failing turbo, transmission, or suspension).

- The truck **fails a pre-purchase inspection** due to other undisclosed issues.

---

### **Recommendation**

1. **Get a Pre-Purchase Inspection (PPI)** Hire a **trusted truck mechanic or dealership** to inspect the tail lights, electrical system, engine, transmission, and frame. This should cost **$200 $500** but could save thousands in unexpected repairs.

2. **Verify the Tail Light Issue**

- Ask the seller for **photos/videos** of the tail light problem and any repairs done.

- Check if the issue is **DMV-reported** (some states log mechanical failures).

- Test the tail lights **in different conditions** (day/night, with keys on/off).

3. **Negotiate the Price** If the tail light is confirmed as a **minor fix**, use it to **lower the asking price by 5 15%** (depending on severity). If it s a **major electrical issue**, walk away unless the seller offers a significant discount.

4. **Check Maintenance Records** Ensure the truck has had **regular oil changes, filter upgrades, and transmission service**. A well-maintained 2020 Peterbilt can last **500,000 miles** with proper care.

5. **Consider Financing Options** If buying used, compare **leasing vs. loan options** to ensure the payment fits your budget. Some lenders offer **used truck loans with lower interest rates** than personal loans.

6. **Alternative Options**

- If the tail light issue is a dealbreaker, look for **another 2020 Peterbilt 579 with a clean history**.

- Consider a **2021 2023 model** if available, as they may have fewer wear-and-tear issues.

- If budget allows, a **new or lightly used Freightliner Cascadia or Kenworth W900** could offer similar reliability with fewer potential issues.

**Final Verdict:**

**Proceed with caution but potential.** If the tail light issue is **isolated and fixable**, and the rest of the truck checks out in a PPI, this could be a **solid purchase** for a long-haul or regional hauler. However, **do not buy blindly** always prioritize a thorough inspection and fair pricing. If the tail light problem is part of a larger electrical or maintenance concern, **seek a better deal elsewhere**.

Details:

If not, let us know how to earn your 5-star rating. Replaces 40874 2020 PETERBILT 579 TAIL LIGHT, WA.

specifications tusilap:

  • for makes: Peterbilt
  • for years: 2020
  • mpn: 2647414
  • part type: Light
  • color: 2 Red 1 White
  • oem part number: 40874

payments tusilap:

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

returns tusilap:

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

shipping tusilap:

  • cost: $0.00
  • class: Standard
  • carrier: UPS
  • transit: 4-8 Days
  • type: Fixed
  • service: UPS Ground

offer tusilap:

  • started: May 14, 2026
  • sold: 0
  • quantity: 1
  • availability: In Stock
  • options: Ship-to-home

general tusilap:

  • Commercial Truck Parts > Lighting > Backup Tail Lights
  • condition: Used

seller tusilap:

  • rating: 99.0%
  • # reviews: 10505
  • city: Spokane, WA
for makes: peterbilt, for years: 2020, part type: light, oem part number: 40874,
manufacturer: peterbilt, category: auto parts > commercial truck parts > lighting > backup tail lights, color: 2 red 1 white, sku: 10938032726813892,
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