FORD EU5T14D231 Lariat Front Left Seat Harness J4CP7

( Manufacturer Part Number: EU5T14D231 ), ( Part Type: Seat Harness ), ( Oe/oem Part Number: Eu5t14d231, J4cp7, Eu5t14d231j4cp7 ), ( Headrest Type: Detachable ), ( Universal Fitment: No ), ( Placement On Vehicle: Front, Left )

Review FORD Lariat Front Left Side Seat Harness Oem fits F150 2015–2020

The **Ford EU5T14D231 J4CP7 (2015 2020 F-150 Lariat Front Left Seat Harness)** is a high-performance, OE-quality seat belt assembly designed exclusively for the premium Lariat trim level of Ford s iconic F-150 pickup trucks from the 2015 through 2020 model years. Crafted to meet or exceed the stringent safety and durability standards set by Ford s original equipment specifications, this harness features a robust, three-point shoulder belt system engineered for both passenger comfort and crash protection. The belt itself is constructed from a blend of high-strength polyester webbing, reinforced with durable nylon stitching to ensure longevity and resistance to wear, tear, and environmental degradation whether from exposure to UV rays, moisture, or the rigors of daily use in a work truck. The **J4CP7** designation indicates a specific part variant tailored for the front left passenger seat, ensuring a precise fit with the truck s integrated seat frame and retractor mechanism, which is calibrated to deploy smoothly during an impact while maintaining optimal tension to secure the occupant. The harness is anchored to the vehicle s structural components via corrosion-resistant steel buckles and mounting hardware, designed to withstand repeated loading cycles without compromising integrity. For added convenience and safety, the retractor mechanism is equipped with a **locking retractable feature**, ensuring the belt remains taut during sudden stops or collisions, while also allowing for easy adjustment and recline when the vehicle is stationary. This harness is a direct replacement for the factory-installed component, making it an ideal choice for owners seeking to restore or upgrade their F-150 s safety features after an accident, during a customization project, or as part of a routine maintenance swap. Whether installed in a daily driver, a towing rig, or a performance-oriented truck, this harness delivers the reliability and performance expected from Ford s original equipment, ensuring both compliance with safety regulations and peace of mind for the driver and passenger.

### **Pros and Cons of Buying a Used Ford F-150 Lariat (2015 2020) Front Left Seat Harness (EU5T14D231 J4CP7)**

1. **Reliability and Durability** The Ford F-150, especially in the Lariat trim, is known for its robust build quality and strong engine options (including the 3.5L EcoBoost V6 and 5.0L V8). With proper maintenance, these trucks are built to last well beyond 200,000 miles.

2. **Strong Resale Value** The F-150 holds its value better than many competitors, meaning you can resell it at a reasonable price later if needed.

- Leather-appointed seating (though the harness itself is likely standard fabric or cloth).

- Power-adjustable driver s seat (though the harness is for the front left passenger seat).

- Uconnect 4.2 infotainment system with Bluetooth, USB, and available navigation.

- Improved interior materials and sound insulation compared to base trims.

- The **3.5L EcoBoost V6** (turbocharged, fuel-efficient, strong towing capacity).

- The **5.0L Coyote V8** (powerful, reliable, great for towing and hauling).

- The **6.2L Power Stroke V8** (if it s a Super Duty, but this is less common in F-150s of this era).

5. **Aftermarket and Customization Support** The F-150 has a large aftermarket following, making it easy to find parts, upgrades, and modifications.

- Ford Co-Pilot360 (adaptive cruise control, blind-spot monitoring, rear cross-traffic alert).

- Stability control and multiple airbag options.

7. **Availability of Parts and Mechanics** Ford dealerships and independent mechanics are widely available, ensuring easy access to repairs and maintenance.

---

1. **Potential Transmission Issues (2015 2017 Models)**

- Some early **6R80 8-speed automatic transmissions** (especially in V6 models) have had reports of rough shifting, delayed engagement, or failure.

- The **5R110 6-speed automatic** (in V8 models) is generally more reliable but may still require attention to fluid changes.

2. **Rust Concerns (Especially in Snowy Regions)**

- Older F-150s (pre-2017) were prone to rust, particularly in the wheel wells, rocker panels, and undercarriage. Always inspect for rust before purchasing.

3. **Infotainment System Limitations**

- The **Uconnect 4.2 system** (2015 2017) can be slow and glitchy compared to newer models.

- Later models (2018 ) have an improved **Uconnect 5 system**, which is more user-friendly.

4. **Fuel Economy Trade-offs**

- The **EcoBoost V6** is fuel-efficient ( 18 20 MPG combined), but the **V8 models** (especially the 5.0L) drink more fuel ( 14 16 MPG combined).

- Diesel options (6.7L Power Stroke) are more efficient for heavy towing but require more maintenance.

5. **Possible Electrical Gremlins**

- Some owners report issues with **window regulators, door locks, or sensor malfunctions**, particularly in older models.

6. **Higher Maintenance Costs Over Time**

- While the F-150 is durable, **timing chain adjustments (on V6 models), transmission fluid changes, and suspension components** can add up in cost if neglected.

7. **Seat Harness-Specific Considerations**

- If the harness is worn or damaged, it may need replacement (costs $50 $150 depending on labor).

- Ensure the harness is **OEM or high-quality aftermarket** to avoid safety risks.

- If buying used, verify that the harness was **properly installed** and not tampered with.

8. **Depreciation**

- While the F-150 retains value well, used models in this range (2015 2020) may still have significant depreciation compared to newer trucks.

---

### **Conclusion**

The **2015 2020 Ford F-150 Lariat** is a solid choice for buyers who prioritize **reliability, towing capacity, and a comfortable interior**. The **front left seat harness (EU5T14D231 J4CP7)** is a standard, replaceable part, so its condition should be checked rather than being a dealbreaker. However, potential buyers should be aware of **transmission quirks, rust risks, and maintenance costs** especially if the truck lacks a full service history.

If you find a **well-maintained example with a reliable engine (preferably the 5.0L V8 or 3.5L EcoBoost), a properly serviced transmission, and no rust issues**, it can be an excellent used purchase. Conversely, if the truck has **neglected maintenance, rough shifting, or visible rust**, it may require significant investment to bring up to standard.

---

### **Recommendation**

- Check for **transmission smoothness** (test drive at different speeds).

- Look for **rust** in wheel wells, frame, and undercarriage.

- Verify **service records** (oil changes, timing chain adjustments, suspension work).

- Test the **seat harness** for wear, proper tension, and secure attachment.

- If possible, choose a **5.0L V8 or 3.5L EcoBoost** over a V6 with transmission concerns.

- Ensure the **transmission fluid is fresh** (6R80 models may need a flush).

- Allocate funds for **suspension components, exhaust, and minor electrical fixes** if needed.

- If the harness is damaged, factor in replacement cost ( $50 $150).

- A mechanic s evaluation ( $100 $200) can uncover hidden issues before purchase.

- **2017 2020 models** (improved Uconnect, better safety features, fewer early transmission issues).

- **2015 2016 V8 models** (if well-maintained, still reliable but watch for transmission quirks).

**Final Verdict:** A **2015 2020 Ford F-150 Lariat with a clean history, no major rust, and a reliable transmission** is a **strong used purchase** for those needing a durable, capable truck. However, buyers should be prepared for **potential maintenance costs** and **due diligence in inspection**. If you find a well-cared-for example, it can be an excellent long-term investment.

Details:

part #: eu5t14d231 prices

• $32.00-$40.00

specifications seainterio:

• for models: F150
• for makes: Ford
• for years: 2015-2020
• mpn: Eu5t14d231
• part type: Seat Harness
• oe/oem part number: Eu5t14d231, J4cp7, Eu5t14d231j4cp7
• headrest type: Detachable
• universal fitment: No
• placement on vehicle: Front, Left

offer seainterio:

• availability: In Stock
• started: May 11, 2026
• best offers: True
• sold: 0
• quantity: 1
• options: Ship-to-home

shipping seainterio:

• cost: $0.00
• transit: 3-9 Days
• class: Standard
• carrier: USPS
• type: Calculated
• service: USPS Ground Advantage

general seainterio:

• Interior Parts Accessories > Seats, Parts Accessories > Seats
• condition: Used

seller seainterio:

• # reviews: 318
• rating: 99.7%
• city: Strongsville, Ohio

returns seainterio:

• policy: Returns Accepted
• paid by: Buyer
• time: 14 Days

payments seainterio:

• credit card: Visa
• wallet: Paypal
• other

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