PETERBILT 16-07559M000L-P Left Driver Headlamp 378 Left/driver P/n

( Manufacturer Part Number: 16-07559M000L-P ), ( Part Type: Driver )

Review PETERBILT 378 Left/driver Headlamp Used P/n Verify fits 1987–2010

The **Peterbilt 16-07559M000L-P (1987 2010) Left/Driver Side Headlamp** is a precision-engineered, high-performance lighting component designed exclusively for Peterbilt Model 378 series trucks, ensuring optimal visibility and compliance with original equipment specifications. This headlamp assembly combines durability with cutting-edge optical engineering, featuring a robust, corrosion-resistant housing crafted from high-grade metal to withstand the rigors of commercial trucking, including exposure to harsh weather conditions, road debris, and prolonged use. The lens itself is molded from polycarbonate, a material renowned for its clarity, impact resistance, and ability to maintain optical integrity over extended periods, even under extreme temperatures. Inside, a sealed beam or projector-style light source depending on the specific model year delivers a powerful, well-distributed beam pattern, enhancing nighttime driving safety and adherence to federal and state lighting regulations. The mounting bracket is engineered for a secure, vibration-dampened fit, ensuring the headlamp remains aligned and functional despite the dynamic stresses of highway travel. Whether replacing a damaged or worn-out original unit or upgrading for improved illumination, this headlamp restores factory performance, ensuring compliance with DOT standards while extending the lifespan of the truck s lighting system. Its universal compatibility with the 1987 2010 Peterbilt 378 models makes it an essential aftermarket solution for fleet operators, independent truckers, and restoration enthusiasts seeking authenticity and reliability.

### **Pros and Cons of Buying a 1987 2010 Peterbilt Model 378 (Left/Driver Headlamp, P/N 16-07559M000L-P)**

#### **Pros**

1. **Proven Reliability** The Peterbilt 378, particularly in the 1987 2010 model range, is known for its durability and strong engine options (commonly paired with Cummins, Detroit Diesel, or Caterpillar powerplants). Many units from this era were built to last with proper maintenance.

2. **Strong Resale Value** Peterbilt trucks, especially well-maintained 378s, hold their value better than many competitors. The model s reputation for longevity and performance contributes to this.

3. **Versatile Cab Options** The 378 was available in various cab configurations (e.g., sleeper, day cab, extended cabs), making it suitable for different hauling needs, from regional to over-the-road (OTR) operations.

4. **Driver-Friendly Design** The 378 features a spacious, well-ventilated cab with good visibility, which is crucial for long-haul drivers. The left-side headlamp (as specified) is a common configuration for OTR trucks, improving visibility in both directions.

5. **Aftermarket Support** Due to its popularity, the 378 has a strong aftermarket presence for parts, upgrades, and modifications. This makes repairs and customizations more accessible.

6. **Lower Purchase Price Compared to New Trucks** Used 378s from this era are significantly cheaper than new models, offering excellent value for the money, especially if well-maintained.

7. **Proven Engine Options** Many units were equipped with robust diesel engines (e.g., Cummins B-series, Detroit DD15, or Cat 3406), which are known for their durability if properly maintained.

8. **Ease of Maintenance** The mechanical simplicity of older diesel engines (compared to modern electronics-heavy systems) can make troubleshooting and repairs more straightforward for experienced mechanics.

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#### **Cons**

1. **Age-Related Wear and Tear** Trucks from this era (1987 2010) are approaching or past 30 years old, meaning critical components like transmissions, axles, and suspension may require significant investment to keep running reliably.

2. **Emissions Compliance** Older diesel engines were not built to meet modern EPA emissions standards (e.g., EPA 2007 or later). Retrofitting or replacing the engine with an EPA-compliant unit (e.g., Cummins X15, Detroit DD15, or Cat C13) can be costly.

3. **Electrical System Reliability** Older trucks often have outdated electrical systems that may suffer from corrosion, failing wiring, or incompatible modern accessories. Upgrades to lighting, alternators, or starter systems may be necessary.

4. **Transmission Limitations** Many 378s from this era were equipped with older transmissions (e.g., Allison TCI, Voith, or Spicer), which may lack the efficiency or durability of modern automated transmissions. Upgrading to a newer transmission (e.g., Eaton Fuller or Allison eSeries) can be expensive.

5. **Fuel Efficiency Concerns** Older engines are less efficient than modern diesels, leading to higher fuel consumption. This can significantly impact operating costs, especially for long-haul or high-mileage operations.

6. **Safety and Modernization Gaps** Features like advanced driver-assistance systems (ADAS), modern telematics, or improved ergonomics are absent. Retrofitting these can be costly and may not always be practical.

7. **Driver Retention Challenges** Younger drivers may prefer newer trucks with modern amenities (e.g., better cab comfort, climate control, or entertainment systems). Older trucks may deter recruitment.

8. **Insurance and Compliance Risks** Older trucks may have higher insurance premiums due to perceived higher risk. Additionally, compliance with modern safety regulations (e.g., ELD mandates, hours-of-service tracking) may require additional investments.

9. **Limited Warranty Coverage** Most used trucks from this era will have no warranty, meaning all repairs fall on the owner. This can be a significant financial risk if major failures occur.

10. **Parts Availability** While parts are generally available, some specialized components (e.g., rare OEM parts for older engines or transmissions) may become harder to source over time, increasing downtime risks.

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### **Conclusion**

The **Peterbilt 378 (1987 2010, left/driver headlamp)** is a **strong, reliable workhorse** that can be a **cost-effective purchase** for operators who prioritize durability, resale value, and a proven chassis. However, its **age introduces significant risks**, particularly around **emissions compliance, fuel efficiency, and the need for major mechanical upgrades**. The truck s value lies in its **longevity and driver appeal**, but buyers must be prepared for **higher maintenance costs, potential engine/transmission replacements, and modernization investments**.

- **Owners with mechanical expertise** who can perform or oversee maintenance.

- **Operators running short-haul or regional routes** where high mileage isn t a primary concern.

- **Businesses that prioritize resale value** and can justify the cost of retrofitting to meet modern standards.

- **Individuals or small fleets** where the lower purchase price outweighs the long-term costs of ownership.

- **Long-haul or high-mileage operations** where fuel efficiency and modern compliance are critical.

- **Fleets without dedicated maintenance staff** or access to experienced mechanics.

- **Operators who want to avoid major capital expenditures** for engine, transmission, or emissions upgrades.

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### **Recommendation**

1. **Get a Comprehensive Pre-Purchase Inspection (PPI)** Hire a **trusted diesel mechanic or truck inspector** to evaluate the engine, transmission, frame, suspension, and electrical systems. Look for signs of **excessive wear, leaks, or structural damage**.

2. **Verify Maintenance Records** Ensure the truck has a **detailed service history**, including **oil changes, filter replacements, and major component overhauls**. A well-documented truck is far more reliable.

3. **Assess Emissions Compliance** Determine if the engine can be **retrofitted or replaced** to meet current EPA standards. If not, factor in the cost of an **engine swap** (e.g., to a Cummins X15 or Detroit DD15).

- **Transmission overhaul or replacement** (if the current unit is failing).

- **Suspension and axle upgrades** (older units may need new shocks, springs, or bearings).

- **Electrical system modernization** (new wiring, alternators, starter, and lighting).

- **Fuel system upgrades** (modern injectors, fuel pumps, or a **defensive driving program** to extend engine life).

5. **Consider a Lower-Mileage Example** Prioritize trucks with **under 500,000 miles** if possible, as they will require fewer immediate repairs.

6. **Negotiate Based on Condition** If the PPI reveals significant issues, use them to **reduce the purchase price** or walk away if the repairs exceed the truck s value.

7. **Explore Financing Options** Older trucks may qualify for **used truck loans**, but be cautious of high interest rates. Some lenders specialize in **classic or high-mileage diesel financing**.

- A **well-maintained 2000s-era Peterbilt 579 or 567** (closer to modern standards but still older).

- A **new or lightly used 2010s model** (e.g., Peterbilt 587 or 579) if budget allows, for better fuel efficiency and compliance.

The **Peterbilt 378 (1987 2010) is a sound investment for the right buyer** one who values **durability, resale potential, and is prepared for the maintenance and modernization costs**. However, it is **not a "set-and-forget" truck** and requires **proactive ownership**. If you are **willing to invest time and money into its upkeep**, it can be a **highly rewarding purchase**. If you prefer **lower long-term costs and fewer surprises**, a **newer or better-maintained used truck** may be a safer choice.

Would you like guidance on specific maintenance tips or upgrade recommendations for this model?

Details:

PRODUCT INFO: Used Peterbilt 378 Left/Driver Headlamp, P/N VERIFY for sale, from a 2002 Truck. If you can't find what you re looking for let us do it. We'll do our best to find it so you don't have. Questions, comments or concerns.

Items shipped UPS Ground cannot go to APO/FPO or Post Office Boxes.

part #: 1607559m000l prices

• $208.99-$839.99

specifications tusilap:

• for makes: Peterbilt
• for years: 1987-2010
• mpn: 16-07559m000l-p
• part type: Driver

general tusilap:

• condition: Used
• Commercial Truck Parts > Lighting > Headlights

seller tusilap:

• # reviews: 6619
• rating: 99.6%
• city: Spencer, Iowa

returns tusilap:

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

payments tusilap:

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

offer tusilap:

• quantity: 1
• options: Ship-to-home
• availability: In Stock
• best offers: True
• sold: 0
• started: April 15, 2026

shipping tusilap:

• type: Fixed
• service: Standard
• cost: $0.00
• transit: 2-6 Days
• class: Standard

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