PETERBILT 2573873 Fuse Box Mn P27-1223-0101 579

( Manufacturer Part Number: 2573873 ), ( Part Type: Fuse Box ), ( Oem Part Number: P27-1223-0101 ), ( Side: Left )

Review PETERBILT Replaces 579 Fuse Box Mn fits 2020

The **Peterbilt Model 2573873 P27-1223-0101 2020 579 Fuse Box** is a precision-engineered electrical component designed exclusively for the **Peterbilt Model 27 Series** trucks, specifically tailored to the **2020 model year** with a **579 fuse block configuration**. This high-quality fuse box is a critical component of the truck s electrical system, ensuring reliable power distribution to essential circuits while safeguarding sensitive electronics from overloads, short circuits, and voltage spikes. Manufactured to meet Peterbilt s stringent quality standards, this fuse box features a robust, corrosion-resistant construction, typically made from durable materials such as **polycarbonate or reinforced plastic**, which are engineered to withstand the harsh conditions of commercial trucking environments, including extreme temperatures, vibrations, and exposure to moisture and road debris. The **P27-1223-0101** designation indicates its compatibility with the **2020 P27 chassis**, where it integrates seamlessly into the truck s electrical architecture, housing a **579-position fuse panel** that accommodates a wide range of fuses, including standard blade fuses, high-capacity fuses, and relay modules, depending on the specific application. This fuse box is strategically positioned within the truck s cab or under the dashboard, often near the **instrument panel or driver s side**, to provide easy access for maintenance and troubleshooting while minimizing the risk of damage from mechanical interference. The design incorporates **clear, numbered labeling** and color-coded fuse slots to simplify identification and replacement, reducing downtime during routine inspections or repairs. Additionally, the fuse box is engineered to comply with **SAE (Society of Automotive Engineers) and industry safety standards**, ensuring that it meets or exceeds the electrical load requirements of the P27 s powertrain, lighting systems, diagnostic ports, and auxiliary equipment. Whether used in regional haulage, over-the-road freight, or specialized commercial applications, this fuse box plays a vital role in maintaining the truck s operational integrity, preventing electrical failures that could lead to costly repairs or operational disruptions. For fleet managers, mechanics, and truck owners, investing in an **OEM-spec fuse box like the P27-1223-0101** ensures long-term reliability, compatibility with aftermarket upgrades, and peace of mind knowing that the truck s electrical system is protected by a component built to the same exacting standards as the vehicle itself.

### **Pros and Cons of Buying a 2020 Peterbilt Model 257 (P27-1223-0101, 579 Fuse Box, MN)**

#### **Pros**

1. **Reliability and Build Quality** Peterbilt trucks are known for their durability, strong chassis, and high-quality manufacturing. The 2020 model benefits from recent refinements in engine and drivetrain components, reducing long-term failure risks.

2. **Modern Engine Options** The 2020 P27 was commonly paired with powerful engines like the **Cummins X15** (15-liter diesel) or **Detroit DD15**, which offer strong torque and fuel efficiency. These engines are designed for heavy-duty hauling with lower emissions compliance.

3. **Advanced Safety Features** The 2020 model likely includes **collision mitigation systems, blind-spot monitoring, lane departure warnings, and automatic emergency braking**, improving driver safety and reducing accident risks.

4. **Comfortable Cabin** Peterbilt s cab designs prioritize driver comfort with ergonomic seating, climate control, and noise reduction. The **Model 579 cab** (a mid-roof option) provides ample space for long hauls.

5. **Resale Value** Peterbilt retains strong resale value compared to some competitors, meaning you can recoup more of your investment if you sell or trade in the truck later.

6. **Customization Options** Buyers can often specify **payload capacity, axle configurations, and auxiliary equipment**, allowing for tailored performance based on freight type.

7. **Lower Maintenance Costs (Compared to Older Models)** With modern diagnostics and improved engine technology, maintenance intervals and part failures are generally reduced compared to pre-2010 trucks.

8. **Fuel Efficiency Improvements** The 2020 model benefits from **aerodynamic refinements, optimized transmissions (e.g., Allison Transmission), and advanced fuel injection systems**, improving MPG over older generations.

9. **Warranty Coverage** If purchased through a dealer or fleet, the truck may still have **remaining factory warranty coverage**, reducing upfront maintenance costs.

10. **Strong Aftermarket Support** Peterbilt has a vast network of **dealers, mechanics, and part suppliers**, ensuring easier repairs and part availability.

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#### **Cons**

1. **High Purchase Price** A 2020 Peterbilt P27 is a **premium truck**, often priced significantly higher than used Freightliners or Kenworths of similar age. The **579 cab and 1223 engine combo** (likely a Cummins X15) will increase the cost further.

2. **Depreciation** While Peterbilt holds value well, a 2020 model has already lost a portion of its original value. If you plan to keep it long-term, depreciation is a factor.

3. **Potential Hidden Maintenance Issues** Even well-maintained trucks may have **unnoticed wear on suspension, drivetrain, or electrical components** (e.g., the **579 fuse box** may require inspection for corrosion or faulty relays). A thorough pre-purchase inspection is critical.

4. **Fuel Costs** Diesel prices fluctuate, and while newer engines are efficient, **operating a heavy-duty truck like this remains expensive** compared to lighter-duty vehicles.

5. **Driver Training & Certification** Operating a **Class 8 truck** requires a **CDL (Commercial Driver s License)**, and some drivers may need additional training for advanced features (e.g., automated braking systems).

6. **Insurance Costs** High-value trucks like this will have **elevated insurance premiums**, especially if used for long-haul or high-risk freight.

7. **Potential for Overbuilding** If the truck was **customized for a specific payload** (e.g., heavy construction hauling) but you need it for lighter freight, you may be paying for unnecessary weight and fuel consumption.

8. **Electrical System Complexity** The **579 fuse box** and modern electronics (e.g., telematics, diagnostics) can be **prone to software glitches or wiring issues**, requiring specialized diagnostics if problems arise.

9. **Limited Availability of Parts** While Peterbilt parts are widely available, **some aftermarket or rare components** (e.g., specific fuse box replacements) may take longer to source than on more common truck brands.

10. **Operator Skill Dependency** A poorly trained driver can **increase wear and tear**, leading to higher maintenance costs. Proper driver training is essential for maximizing longevity.

---

### **Conclusion**

A **2020 Peterbilt Model 257 (P27-1223-0101, 579 cab, 579 fuse box)** is an **excellent choice for buyers** who prioritize **reliability, safety, and long-term durability**. Its **modern engine, advanced safety features, and strong resale value** make it a **premium investment** for fleet operators or owner-operators running heavy-duty freight.

However, the **high upfront cost, potential maintenance risks, and operational expenses** (fuel, insurance, driver training) mean it is **not ideal for casual buyers or those on a tight budget**. If you **need a truck for high-mileage, long-haul, or heavy payload work**, this model is a **strong contender**, provided it undergoes a **comprehensive inspection** before purchase.

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### **Recommendation**

You are a **fleet owner or experienced owner-operator** with access to proper maintenance.

You need a **reliable, high-performance truck** for **heavy-duty hauling** (e.g., construction, oversized loads).

You can **afford the upfront cost** and **operating expenses** (fuel, insurance, potential repairs).

The **pre-purchase inspection confirms** no major electrical (fuse box), drivetrain, or structural issues.

You plan to **keep it for at least 5 7 years**, maximizing its value retention.

You are a **first-time buyer** without experience in commercial truck maintenance.

You **cannot afford** the **higher insurance, fuel, and repair costs** associated with a premium truck.

The **seller lacks maintenance records**, raising concerns about hidden damage.

You **do not need** the **extra payload capacity** and would be better suited with a lighter-duty model.

For the right buyer **someone who values durability, safety, and long-term performance** this **2020 Peterbilt P27 is a solid investment**. However, **due diligence is critical**, and **budgeting for potential repairs** should be part of the decision. If purchased wisely, it will serve as a **reliable workhorse** for years.

Details:

If not, let us know how to earn your 5-star rating. Replaces P27-1223-0101 2020 PETERBILT 579 FUSE BOX, MN: 'PACCAR FIRE WALL MOUNTED BOX.

part #: 2573873 prices

• $980.00-$3363.65

specifications tusilap:

• for makes: Peterbilt
• for years: 2020
• mpn: 2573873
• part type: Fuse Box
• oem part number: P27-1223-0101
• side: Left

seller tusilap:

• city: Wykoff, MN
• rating: 98.9%
• # reviews: 10218

returns tusilap:

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

shipping tusilap:

• service: UPS Ground
• class: Standard
• cost: $0.00
• transit: 4-6 Days
• carrier: UPS
• type: Fixed

general tusilap:

• Commercial Truck Parts > Lighting > Wiring Fuses
• condition: Used

offer tusilap:

• started: April 25, 2026
• availability: In Stock
• sold: 0
• quantity: 1
• options: Ship-to-home

payments tusilap:

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

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