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Direct Replacement Engine Wiring Harness for 3C3Z12B637BA (Ford 6.0L Powerstroke)
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Direct Replacement Engine Wiring Harness for 3C3Z12B637BA (Ford 6.0L Powerstroke)

Engine Wiring Harness for 6.0L Powerstroke Ford F250 F350 F450 F550 Super Duty (2003-2004)

$258.06
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Details
Year
Ford Model
Engine
OEM Part Number
2003
F250/F350/F450/F550 Super Duty
6.0L Powerstroke Diesel
3C3Z-12B637-BA
2004
F250/F350/F450/F550 Super Duty
6.0L Powerstroke Diesel (including "e" version)
3C3Z-12B637-BA

Introduction

Engine Wiring Harness for 6.0L Powerstroke Ford F250 F350 F450 F550 Super Duty (2003-2004) – Direct replacement for OEM part 3C3Z-12B637-BA, brought to you byEGR Performance. This high-quality wiring kit is engineered to restore and enhance your Ford Super Duty’s engine electrical system, ensuring stable performance and a seamless fit for your 6.0L Powerstroke diesel engine.

 
Shipping Details

Ontario CA / Springdale OH / Newark NJ
Package List
  • 1 x EGR Performance Engine Wiring Harness Kit (matches OEM part 3C3Z-12B637-BA)
  • No installation instructions included (contact service@egrperformance.com for guidance; professional installation is recommended)
Delivery Time

2-5 working days inland in the United States

Product details

Product Overview

The EGR Performance Engine Wiring Harness is a premium aftermarket replacement, specifically designed for 2003-2004 Ford F250, F350, F450, and F550 Super Duty models equipped with the 6.0L Powerstroke Diesel engine (including the 2004 "e" version). As a direct replacement for OEM part 3C3Z-12B637-BA (3C3Z12B637BA), it matches the original specifications perfectly, eliminating compatibility issues and simplifying installation.Crafted with high-quality materials and professional manufacturing, this wiring harness addresses common issues with aging OEM harnesses—such as wire wear, insulation damage, and signal instability—that lead to engine performance problems. It ensures reliable electrical transmission to critical engine components, keeping your Super Duty running smoothly for long-term use.

Ideal For

  • Owners of 2003-2004 Ford F250, F350, F450, F550 Super Duty models with 6.0L Powerstroke Diesel engines (including 2004 "e" version) needing a replacement for a faulty or worn engine wiring harness.
  • DIY enthusiasts and professional mechanics seeking an easy-to-install, direct-replacement wiring harness for Ford 6.0L Powerstroke Super Duty vehicles.
  • Those looking to restore stable engine performance by resolving electrical issues caused by damaged or outdated wiring harnesses.
  • Customers needing a high-quality aftermarket alternative to expensive OEM parts, backed by reliable customer support and a 1-year warranty.
  • Anyone verifying part compatibility—this harness matches OEM part numbers 3C3Z-12B637-BA and 3C3Z12B637BA for a guaranteed fit.

Core Advantages

  • Easy Installation: Designed as a direct replacement for OEM part 3C3Z-12B637-BA, no modifications are required—perfect for both DIY enthusiasts and professional mechanics (professional installation is recommended, no instruction included).
  • Premium Quality: Made with high-grade materials and professional manufacturing processes, ensuring durability, corrosion resistance, and stable performance for long-term use in harsh engine bay conditions.
  • Direct Replacement Fit: Precisely engineered to match the fit, function, and connector positions of the original Ford 6.0L Powerstroke wiring harness, ensuring a seamless integration with your 2003-2004 Super Duty.
  • Stable Performance: Delivers reliable electrical signal transmission to engine components, resolving issues like erratic performance, hard starting, or short circuits caused by faulty wiring.
  • 1-Year Warranty: Backed by a 1-year warranty from EGR Performance, covering manufacturing defects and providing peace of mind for your investment.
  • Excellent After-Sales Service: Contact our customer support at service@egrperformance.com for assistance with fitment, installation, or warranty claims.

Technical Specifications

  • Brand: EGR Performance
  • Product Type: Engine Wiring Harness/Kit
  • Condition: Brand New
  • OEM/OEM Part Number: 3C3Z-12B637-BA, 3C3Z12B637BA
  • Interchange Part Number: 3C3Z-12B637-BA, 3C3Z12B637BA
  • Superseded Part Number: Does not apply
  • Fitment Type: Direct Replacement
  • Placement on Vehicle: Front
  • Universal Fitment: No
  • Warranty: 1-Year Manufacturer Warranty (replaces original lifetime warranty per supplementary info)
  • Installation: Professional installation recommended, no installation instructions included
  • Customer Support: service@egrperformance.com

Why Choose This Engine Wiring Harness

When it comes to replacing the engine wiring harness for your 2003-2004 Ford 6.0L Powerstroke Super Duty, EGR Performance delivers the reliability, fit, and value you need. Here’s why this harness stands out:

  • OEM-Level Compatibility: Directly replaces Ford OEM part 3C3Z-12B637-BA, ensuring a perfect fit for 2003-2004 F250-F550 Super Duty 6.0L Powerstroke models (including 2004 "e" version) without any modifications.
  • Durability You Can Trust: Premium materials and professional manufacturing resist wear, corrosion, and high engine bay temperatures—built to last as long as your Super Duty’s 6.0L Powerstroke engine.
  • Problem-Solving Design: Resolves common 6.0L Powerstroke wiring issues (e.g., wire fraying, insulation cracking, signal loss) that cause engine malfunctions, saving you time and money on repeated repairs.
  • Cost-Effective Alternative: Avoid the high cost of OEM dealership parts while getting the same level of quality and performance—ideal for DIY restorers and professional repair shops.
  • Dedicated Support: Our customer service team is available at service@egrperformance.com to help verify fitment (provide your VIN for assistance), answer installation questions, and handle warranty claims.
  • SEO-Optimized Compatibility: Precision-matched to the exact keywords Ford Super Duty owners search for (6.0L Powerstroke, 2003-2004 F250/F350, 3C3Z-12B637-BA), ensuring your listing ranks for relevant searches.

This Engine Wiring Harness is a direct replacement for OEM part 3C3Z-12B637-BA and is fully compatible with the following Ford models (note: vehicle compatibility charts are for reference only—provide your VIN to verify fitment):

  • 2003 Ford F250 Super Duty 6.0L Powerstroke Diesel
  • 2003 Ford F350 Super Duty 6.0L Powerstroke Diesel
  • 2003 Ford F450 Super Duty 6.0L Powerstroke Diesel
  • 2003 Ford F550 Super Duty 6.0L Powerstroke Diesel
  • 2004 Ford F250 Super Duty 6.0L Powerstroke Diesel (including "e" version)
  • 2004 Ford F350 Super Duty 6.0L Powerstroke Diesel (including "e" version)
  • 2004 Ford F450 Super Duty 6.0L Powerstroke Diesel (including "e" version)
  • 2004 Ford F550 Super Duty 6.0L Powerstroke Diesel (including "e" version)
  1. Dispatch Time: Orders will be shipped within 24 hours after successful payment.
  2. Delivery Time: 2-5 business days after dispatch (delivery speed depends on proximity to warehouse location).
  3. Return Window:7 days for unsatisfactory items45 days for quality-related issues
  4. Refund Processing: Refunds will be processed back to your original payment method within 2-4 business days after receiving the automated refund confirmation email (subject to bank verification).
  • Will this Engine Wiring Harness fit my 2003 Ford F250 Super Duty 6.0L Powerstroke?

    Yes! This harness is specifically designed for 2003 Ford F250 Super Duty models with the 6.0L Powerstroke Diesel engine and is a direct replacement for OEM part 3C3Z-12B637-BA.
  • Is this harness compatible with the 2004 Ford F350 Super Duty 6.0L "e" version?

    Absolutely. This EGR Performance Engine Wiring Harness works with all 2004 Ford F250-F550 Super Duty 6.0L Powerstroke Diesel models, including the "e" version, and directly replaces 3C3Z-12B637-BA.
  • Does this package include installation instructions?

    No, this Engine Wiring Harness kit does not include installation instructions. Professional installation is recommended, and you can contact our customer support at service@egrperformance.com for guidance.
  • What is the warranty period for this 6.0L Powerstroke wiring harness?

    This harness is backed by a 1-year warranty from EGR Performance, covering manufacturing defects. Contact service@egrperformance.com for warranty claims or assistance.
  • How do I verify if this harness fits my Ford Super Duty?

    You can confirm fitment by checking your vehicle’s OEM part number (must match 3C3Z-12B637-BA or 3C3Z12B637BA) or by providing your VIN to our customer support team at service@egrperformance.com for verification.
  • Is this a direct replacement for OEM part 3C3Z-12B637-BA?

    Yes! This EGR Performance Engine Wiring Harness is a direct replacement for Ford OEM part 3C3Z-12B637-BA (and 3C3Z12B637BA), matching all original specifications for fit and function.
  • Can I install this harness myself, or do I need a professional?

    While the harness is designed for easy, direct installation, professional installation is recommended (especially if you’re not familiar with 6.0L Powerstroke engine wiring). No instructions are included, but our support team can assist with guidance.
  • Will this harness fix electrical issues in my 2004 Ford F450 Super Duty 6.0L Powerstroke?

    Yes! This harness resolves common electrical problems caused by worn or damaged wiring, such as erratic engine performance, hard starting, short circuits, or signal loss to critical engine components.
  • What materials are used in this Engine Wiring Harness?

    This harness is made with high-grade, durable materials—including corrosion-resistant wires and heat-resistant insulation—to withstand harsh engine bay conditions and ensure long-term, stable performance.
  • Is this harness compatible with 2004 Ford F550 Super Duty 6.0L Powerstroke?

    Yes, this harness is fully compatible with 2004 Ford F550 Super Duty models equipped with the 6.0L Powerstroke Diesel engine (including the "e" version), as well as all other 2003-2004 F250-F550 Super Duty 6.0L models.
  • What should I do if the harness doesn’t fit my vehicle?

    First, verify your vehicle’s year, model, engine, and OEM part number (must be 3C3Z-12B637-BA). If you still have fitment issues, contact service@egrperformance.com with your VIN for further assistance.
  • Does this harness come with all necessary connectors?

    Yes! This Engine Wiring Harness kit includes all necessary connectors, matching the original OEM design to ensure a seamless fit with your 6.0L Powerstroke engine’s components.