MOPAR 04578243AC Emission Label

( Manufacturer Part Number: 04578243AC ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Universal Fitment: Direct Replacement ), ( Make: Chrysler ), ( Parts Included: Only Part Reference 1 On The Diagram Is Included ), ( Replaces Part Number: 4578243ab )

Review MOPAR Genuine Emission Label 4578243ac fits 300M 2003

The **Mopar 04578243AC Emission Label** is a precision-engineered, high-quality adhesive-backed label designed specifically for compliance with emissions regulations on Mopar-equipped vehicles, particularly those manufactured for the North American market. This label is a critical component of vehicle certification, ensuring that the engine meets the stringent environmental standards set by agencies such as the Environmental Protection Agency (EPA) and the California Air Resources Board (CARB). Crafted from durable, weather-resistant materials, the label features a clear, tamper-evident adhesive that maintains its integrity under varying temperature conditions, from extreme heat to freezing cold, without peeling, bubbling, or degrading over time. The label is printed with high-resolution, UV-resistant ink that guarantees long-lasting readability, even after prolonged exposure to sunlight or harsh outdoor elements. Its compact yet robust design allows for easy installation on engine compartments, fuel tanks, or other designated areas as required by manufacturer specifications. Beyond its functional purpose, the label also serves as a visual indicator of the vehicle s compliance, providing peace of mind to both consumers and regulatory authorities. Whether applied during original equipment manufacturing (OEM) or aftermarket modifications, this label ensures that the vehicle adheres to emissions standards, helping to reduce harmful pollutants and contribute to cleaner air. Its seamless integration with Mopar s engineering standards makes it an indispensable part of modern automotive compliance, bridging the gap between performance and environmental responsibility.

The **Mopar 04578243AC** (also known as the **4578243AC**) is an emission control component, specifically a **PCV (Positive Crankcase Ventilation) valve** or a related emissions-related part for certain Chrysler, Dodge, Jeep, and Ram vehicles from the late 1990s to early 2010s. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

---

### **Pros of buying a Mopar 04578243AC**

1. **OEM Quality and Reliability**

- Mopar is Chrysler s official aftermarket brand, meaning this part is designed to meet or exceed the original equipment manufacturer (OEM) specifications. It should fit and function identically to the factory part, reducing the risk of compatibility issues or premature failure.

2. **Warranty Coverage**

- Mopar parts often come with a warranty (typically 1 2 years), providing peace of mind against defects. This is especially useful if the part fails shortly after installation.

3. **Ease of Installation**

- As an OEM replacement, the part is designed to be straightforward to install, requiring minimal tools and expertise. Many users report that it drops right into place without modifications.

4. **Compatibility with Emissions Systems**

- The PCV valve (or similar emissions component) plays a critical role in maintaining proper crankcase ventilation and reducing harmful emissions. A high-quality replacement ensures the vehicle continues to pass emissions tests and avoids check engine lights (CEL) related to PCV or EVAP system issues.

5. **Cost-Effective for Long-Term Use**

- While the upfront cost may be slightly higher than aftermarket alternatives, the longevity and reliability of Mopar parts often make them a cost-effective choice over time. Cheaper knockoffs may fail sooner, leading to repeated replacements.

6. **Support for Vintage and Classic Vehicles**

- For older vehicles (especially those from the late '90s to mid-2000s), finding genuine OEM parts can be challenging. Mopar provides a reliable source for these hard-to-find components.

7. **Consistency in Performance**

- Unlike aftermarket parts that may vary in quality, Mopar parts are manufactured to consistent standards. This ensures predictable performance, which is critical for emissions-related components that affect engine efficiency and drivability.

---

### **Cons of buying a Mopar 04578243AC**

1. **Higher Upfront Cost**

- Mopar parts are generally more expensive than generic aftermarket alternatives. For budget-conscious buyers, this can be a significant drawback, especially if the part is not readily available elsewhere at a lower price.

2. **Limited Availability for Very Old or Niche Models**

- While Mopar serves a wide range of Chrysler/Dodge/Jeep/Ram vehicles, some older or less common models may not have this specific part listed in their catalog. In such cases, you may need to order it directly from Mopar or a dealer, which could delay repairs.

3. **Potential for Overkill on Newer Vehicles**

- If your vehicle is relatively new (post-2010s) or uses a different emissions system (e.g., modern turbocharged engines with advanced PCV systems), this older-style part may not be the best fit. It could lead to compatibility issues or reduced efficiency.

4. **No Significant Performance Advantage**

- Unlike performance parts (e.g., high-flow air filters or exhaust systems), this PCV valve does not improve engine performance. It is purely a maintenance or emissions-related component. Buyers should not expect any power or efficiency gains.

5. **Dependence on Dealer or Authorized Sellers**

- Mopar parts are often sold through dealerships or authorized distributors, which may limit your purchasing options compared to aftermarket parts available at auto parts stores (e.g., AutoZone, O Reilly, RockAuto).

6. **Possible Misidentification**

- If the part number is misidentified (e.g., confusing it with a different PCV valve or emissions sensor), you may end up with the wrong component. Always double-check the application before purchasing to ensure it matches your vehicle s year, make, and engine.

7. **Environmental and Regulatory Considerations**

- Emissions-related parts are subject to strict regulations. If the vehicle is in a state with stringent emissions testing (e.g., California), using a non-OEM or incorrect part could cause it to fail inspections. Mopar parts mitigate this risk but do not guarantee compliance if installed incorrectly.

---

### **Conclusion**

The **Mopar 04578243AC** is a solid choice for replacing a PCV valve or similar emissions component in compatible Chrysler/Dodge/Jeep/Ram vehicles, particularly if you prioritize reliability, warranty coverage, and OEM compatibility. Its advantages in quality and ease of installation make it ideal for maintenance tasks where you want to avoid future issues. However, the higher cost and limited availability for niche models may deter some buyers, especially those working on a tight budget or repairing newer vehicles with different emissions systems.

For most owners of older vehicles (1990s early 2010s) experiencing PCV-related issues (e.g., oil leaks, check engine lights, or rough idle), the Mopar part is a practical and trustworthy option. If cost is a major concern, generic aftermarket alternatives (e.g., from brands like Fram or WIX) may suffice, but they lack the warranty and long-term reliability of Mopar.

---

### **Recommendation**

- You own a Chrysler/Dodge/Jeep/Ram vehicle from the late '90s to early 2010s with confirmed compatibility.

- You value OEM quality, warranty protection, and ease of installation.

- The vehicle is subject to emissions testing, and you want to ensure compliance.

- You are repairing a classic or high-mileage vehicle where reliability is critical.

- Your vehicle is newer (post-2010s) and may require a different emissions component.

- You are on a tight budget and can find a high-quality aftermarket PCV valve (e.g., from Fram, WIX, or ACDelco) at a lower price.

- The part is extremely hard to find, and you are willing to risk a generic replacement for cost savings.

- Verify the part number matches your vehicle s exact application (year, make, model, and engine code). Use resources like the **Mopar Parts Catalog**, **Chilton Manual**, or **Haynes Repair Manual** to confirm.

- Check for reviews or feedback from other owners of your vehicle model to ensure the part is widely recommended.

- If possible, test the current PCV valve for clogs or damage before replacing it sometimes cleaning the old part can resolve the issue without a full replacement.

In summary, the Mopar 04578243AC is a **reliable and recommended choice** for its intended application, but always weigh the pros and cons against your specific needs and budget.

Details:

Electrical parts are not returnable. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer. Parts must be resalable and in the original packaging. The OEM part number on packaging must not be damaged.

part #: 04578243ac prices

• $17.25-$35.69

specifications emissyste:

• for models: 300m
• for makes: Mopar
• for years: 2003
• mpn: 04578243ac
• genuine oem: Yes
• manufacturer warranty: 1 Year
• universal fitment: Direct Replacement
• make: Chrysler
• parts included: Only Part Reference 1 On The Diagram Is Included
• replaces part number: 4578243ab

offer emissyste:

• availability: In Stock
• quantity: 4
• options: Ship-to-home
• sold: 0
• started: May 3, 2026

returns emissyste:

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

shipping emissyste:

• class: Standard, Expedited
• service: UPS Ground, UPS 2nd Day Air
• cost: $0.00
• transit: 6-12 Days
• type: Fixed
• carrier: UPS

payments emissyste:

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

general emissyste:

• condition: New
• Car Truck Parts Accessories > Exhaust Emission Systems > Other Exhaust Emission Parts

seller emissyste:

• # reviews: 126
• rating: 98.7%
• city: Lewistown, Pennsylvania

Mopar 04578243AC Is Similar To:

• 04578209ad Mopar Fuel Evaporative Emission Control System Lines (41.1% similar) This part fits vehicles made in the following years 2003 , 2004 . 24 lb width : 10...(May 8th, 2018)
• 04581485ad Mopar Brand New Genuine (36.1% similar) Brand new genuine mopar oem vacuum pump 4581485AD in box...(December 16th, 2017)
• 04593884ag Mopar Chrysler Dodge Jeep Oem Vapor Canister Fuel Gas Emission (29.5% similar) ...(April 9th, 2018)
• 04861440aa Mopar New Genuine Oem Dodge Chrysler Jeep Vapor Canister Aa (35.3% similar) ...(October 22nd, 2018)
• 05085118ab Mopar Fuel Evaporative Emission Control System Lines (37.5% similar) ...(October 17th, 2018)
• 05147030ag Mopar Fuel Evaporative Emission Control System Lines (37.5% similar) In other part number: 05147030AF, 05147030AD, 05147030ACWEIGHT. This part fits vehicles made in the following years 2011 , 2012 , 2013 , 2014 . Superseded part numbers this item may have been from a different number manufacture...(May 8th, 2018)
• 05147085ac Mopar Fuel Evaporative Emission Control System Lines (37.5% similar) V6 gas naturally aspirated. 6 liter canister hose item specifics: height : 9 in length : 10 weight...(June 14th, 2018)
• 05147384ae Mopar Chrysler Dodge Jeep Vapor Canister Fuel Gas Emission (30.5% similar) Chrysler oem vapor canister fuel gas emission. 5147384AD 68000382AF...(October 24th, 2018)
• 05154322ab Chrysler Brand New Genuine Mopar Oem Vacuum Pump (35.2% similar) Manufacturer part number: 5154322AB identified in schematic if applicable: no available. All of Tosca's top quality oem replacement parts are backed by a 12 month 12,000 mile warranty...(October 23rd, 2018)
• 05175907aa Chrysler Brand New Genuine Mopar Oem Vacuum Pump (33.3% similar) All of Tosca's top quality oem replacement parts are backed by a 12 month 12,000 mile warranty. Manufacturer part number: 5175907AA identified in schematic if applicable: no available...(October 23rd, 2018)
• 3656855 Emission Nox Delay Vacuum Firewall Mounted Mopar Models (28.6% similar) Electrical switch panel switch, column electronic chassis control modules engine module parts, misc. Inches axle shaft spindle knuckle, stub, rear suspension strut back glass regulator backing plate, backup lamp bell housing belt pensioner blower motor body parts, misc. We gladly will accept ...(January 3rd, 2019)