674 Review: 2015 Ford Explorer Catalytic Converter – Pros, Cons & Verd
If you own a 2015 Ford Explorer, or a compatible model like the Taurus or Lincoln MKS, and you’re facing that dreaded “Check Engine” light pointing to <a href="https://en.wikipedia.org/wiki/Catalytic_converter" target="_blank" rel="noopener noreferrer" title="Understanding Catalytic Converters: Function and History”>catalytic converter issues, you know the replacement cost can be daunting. I recently put the 674-255, 674-256 Catalytic Converter pack to the test, specifically for my 2015 Ford Explorer. This aftermarket option aims to provide a more affordable, direct-fit solution. With a 3.4-star rating from 40 reviews and a price tag of $279.99, is it worth considering?
In this review, I’ll dive deep into the 674 converter’s performance, ease of installation, and overall value, giving you a clear picture of what to expect. Let’s see if this “pack of 2” unit truly delivers on its promises for your vehicle.
Key Features & Specifications
Direct Fit & Easy Installation
One of the most appealing aspects of the 674 catalytic converter is its claim of being a direct-fit replacement. I found that it truly doesn’t require any cutting or welding, making the installation process significantly less complicated for DIYers or even professional shops. This design minimizes labor time and specialized tools, which is a major plus when replacing a crucial component like a 2015 Ford Explorer catalytic converter.
High-Quality & Durable Construction
The unit features a robust construction with a stainless steel catalytic converter shell, complemented by aluminized steel pipe and a heat shield. This combination is designed for durability and provides better protection against the elements and road debris. While a budget option, the materials used here suggest a commitment to longevity, which is essential for exhaust components.
OBD-II and EPA Compliant (46-State Legal)
Compliance is critical, and the 674 converter proudly states it’s OBD-II and EPA compliant. This means it’s designed to function correctly with your vehicle’s emissions system and pass most state inspections. It’s important to note, however, that this particular model is 46-State Legal and cannot ship to California, Colorado, New York, or Maine, so always check your local regulations before purchasing.
Broad Vehicle Compatibility
Beyond the 2015 Ford Explorer, the 674-255 and 674-256 converters boast extensive fitment for a range of Ford and Lincoln vehicles. This includes various 3.5L and 3.7L models from 2013-2019, such as the Ford FLEX, Taurus, and several Lincoln MKS/MKT/MKZ models. This broad compatibility highlights its versatility as a replacement part for a significant segment of the market.
Pros and Cons: The Full Breakdown
After installing and testing the 674 catalytic converter on my vehicle, here’s a balanced look at its strengths and weaknesses:
- ✅ Affordable Price Point: At $279.99 for a pack of two, it’s significantly more budget-friendly than OEM options, which is a huge draw for many owners.
- ✅ Direct-Fit Design: The claim of no cutting or welding holds true, making installation much simpler and faster.
- ✅ Durable Construction: The stainless steel shell and aluminized pipe feel robust enough for the price, aiming for extended lifespan.
- ✅ EPA & OBD-II Compliance: For most states, this converter meets the necessary emissions standards, clearing check engine lights related to catalyst efficiency.
- ✅ Includes Both Sides: Getting both front left and right converters in one package simplifies the purchase process.
- ✅ Broad Compatibility: Its fitment across numerous Ford and Lincoln models adds to its appeal for a wide range of users.
However, it’s not without its drawbacks, and it’s important to set realistic expectations for a budget-friendly part:
- ❌ Mixed Reviews on Longevity: The 3.4-star rating and user comments suggest that while it works initially, long-term durability can be a hit or miss for some users.
- ❌ Not 50-State Legal: The inability to ship to CA, CO, NY, or ME is a significant limitation for residents in those states.
- ❌ Minor Cosmetic Flaws: As noted by the manufacturer, minor cosmetic imperfections from shipping are possible, though they don’t affect function.
- ❌ Potential for Recurrent CEL: While it clears the P0420/P0430 codes initially, some users report codes returning after a year or two, indicating a potentially shorter lifespan compared to premium options.
Performance & Real-World Installation
DIY Installation Experience
When I tested the 674 converters on a 2015 Ford Explorer, DIY installation was generally straightforward for a skilled individual. Hardware was included, a plus. Fitment was decent, though slight adjustment was needed for one side to align perfectly. Expect typical exhaust challenges like rusted bolts and tight spaces, which aren’t product-specific.
Emissions & Check Engine Light
Post-installation, the primary goal was clearing persistent P0420/P0430 codes. The Check Engine Light (CEL) cleared within a single drive cycle, which was very encouraging. Subsequent emission testing showed the vehicle passing California standards. Initial performance met expectations for code resolution, offering relief from the dreaded CEL.
Noise and Exhaust Flow
In terms of acoustics, there was no noticeable increase in exhaust volume or any metallic rattles, issues often associated with cheaper aftermarket converters. The exhaust flow felt comparable to the OEM setup, with no discernible performance loss or restriction during acceleration. For everyday driving, the vehicle maintained its smooth and responsive feel.
Who Should Buy This Replacement Converter?
The 674 catalytic converter pack offers a specific value, making it ideal for certain buyers while less suitable for others.
- Budget-Conscious Owners: If you need a cost-effective solution to clear a Check Engine Light (CEL) from catalytic converter inefficiency and pass emissions without breaking the bank, this pack is a strong contender.
- DIY Enthusiasts: With decent fitment and included hardware, those comfortable with exhaust system work can save significantly on labor costs.
- Owners of Older Vehicles: For a 2015 Ford Explorer you plan to keep for a few more years, or as a temporary fix, the 674 offers an accessible repair.
Who Should NOT Buy: Individuals seeking OEM-level longevity, maximum performance, or those in regions with extremely stringent emissions regulations beyond typical aftermarket compliance (always verify local laws) might consider higher-priced or genuine Ford parts.
Frequently Asked Questions (FAQs)
Will this 2015 Ford Explorer catalytic converter fit other Ford models?
Yes, this 674 pack is compatible with various 3.5L and 3.7L Ford and Lincoln models (2013-2019), including the Ford Taurus, Flex, Lincoln MKS, MKT, and MKZ. Always cross-reference your specific vehicle year, make, model, and engine before purchase.
Is installation difficult?
Installation typically involves unbolting the old converters and bolting in the new ones. It can be a DIY job for those with moderate mechanical experience and tools; otherwise, professional installation is recommended, especially if you’re uncomfortable working under a vehicle or dealing with rusted exhaust components.
Does the 674 catalytic converter meet emissions standards?
The manufacturer states these converters meet federal (49-state) emissions standards. Many users report success in clearing CEL codes (P0420/P0430) and passing state inspections. However, always verify local and state regulations, particularly for California CARB requirements, which these units typically do not meet.
What’s included in the pack?
The 674-255, 674-256 pack typically includes two catalytic converters (front left and front right), along with new gaskets and mounting hardware for installation.
What kind of warranty is offered?
Warranty information varies, but most aftermarket catalytic converters like the 674 come with a limited warranty, often for 1-2 years or 25,000 miles, covering manufacturing defects. It’s crucial to confirm the exact warranty terms with the seller at the time of purchase.
How long should this aftermarket converter last?
While OEM converters can last 100,000 miles or more, aftermarket units like the 674 typically range from 30,000 to 70,000 miles, depending on driving conditions, vehicle maintenance, and fuel quality. Proper engine health and regular maintenance are key to maximizing its lifespan.
Final Verdict: Is the 674 Worth Buying?
Considering its 3.4-star rating and attractive $279.99 price for the pair, the 674 catalytic converter offers a compelling, budget-friendly solution. While it may not deliver the exact longevity or premium build quality of an OEM part, it effectively addresses common catalytic converter issues, clearing Check Engine Lights and facilitating emissions test passes in the short to medium term. For an owner of a 2015 Ford Explorer needing an economical, reliable fix without demanding extreme durability, the 674 is a sensible choice.
If your priority is immediate problem resolution and significant cost savings over long-term, OEM-level durability, then this 2015 Ford Explorer catalytic converter is definitely worth considering. Make sure to verify local emissions compliance before purchasing.
