Engine Wiring Harness for 7.3L Powerstroke 1999-2001 Ford F250
EGR Performance Engine Wiring Harness 7.3L Powerstroke F350 2001
1999-2001 Ford 7.3L Powerstroke Engine Wiring Harness (F81Z-12B637-EA)
Premium Engine Wiring Harness for Ford F250 F350 7.3L 1999-2001
EGR Direct Replacement Wiring Harness 7.3L Powerstroke 1999-2001 Ford
Engine Wiring Harness for 7.3L Powerstroke 1999-2001 Ford F250
EGR Performance Engine Wiring Harness 7.3L Powerstroke F350 2001
1999-2001 Ford 7.3L Powerstroke Engine Wiring Harness (F81Z-12B637-EA)
Premium Engine Wiring Harness for Ford F250 F350 7.3L 1999-2001
EGR Direct Replacement Wiring Harness 7.3L Powerstroke 1999-2001 Ford

Engine Wiring Harness for 7.3L Powerstroke Ford F250 F350 (1999-2001) Replace F81Z-12B637-EA

$137.89
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Details
Model Year
Vehicle Model
Engine
Transmission Type
Replacement Part Number
Fitment Type
1999-2001
Ford F-250 Super Duty
7.3L V8 Diesel Engine
Automatic Transmission
F81Z-12B637-EA
Direct Replacement
1999-2001
Ford F-350 Super Duty
7.3L V8 Diesel Engine
Automatic Transmission
F81Z-12B637-EA
Direct Replacement
1999-2001
Ford F-450 Super Duty
7.3L V8 Diesel Engine
Automatic Transmission
F81Z-12B637-EA
Direct Replacement
1999-2001
Ford F-550 Super Duty
7.3L V8 Diesel Engine
Automatic Transmission
F81Z-12B637-EA
Direct Replacement
1999-2001
Ford Excursion
7.3L V8 Diesel Engine
Automatic Transmission
F81Z-12B637-EA
Direct Replacement
Engine Wiring Harness for 7.3L Powerstroke 1999-2001 Ford F250 F350 – Manufactured by EGR Performance, this direct replacement harness (replacing F81Z-12B637-EA) is 100% brand-new and high-quality. Backed by a 1-year warranty, it’s tailored for 1999-2001 Ford Super Duty and Excursion 7.3L diesel models with automatic transmission, with professional support available at service@egrperformance.com.

 
Shipping Details

Ontario CA / Springdale OH / Newark NJ
Package List
Delivery Time

2-5 working days inland in the United States

Product details

Product Overview

The EGR Performance Engine Wiring Harness is a model-specific direct replacement engineered exclusively for 1999-2001 Ford diesel vehicles equipped with the 7.3L V8 engine. Key highlights:

  • Directly replaces OEM part number: F81Z-12B637-EA
  • Compatible with 1999-2001 Ford F-250/F-350/F-450/F-550 Super Duty and Excursion
  • Critical fitment note: Exclusively for models with 7.3L V8 Diesel Engine and Automatic Transmission
  • 100% brand-new construction, free from wear, corrosion, or pre-existing electrical faults
  • Restores reliable electrical communication between engine components, resolving issues from worn or faulty OEM harnesses

This harness is designed to meet the exact electrical specifications of 1999-2001 7.3L Powerstroke automatic transmission models, ensuring seamless integration and long-term reliability for daily driving, heavy-duty hauling, or towing.

Ideal For

This Engine Wiring Harness is perfect for owners of 1999-2001 Ford 7.3L Diesel models who:

  • Need to replace a damaged, corroded, or malfunctioning OEM harness with part number F81Z-12B637-EA
  • Own 1999-2001 Ford F-250/F-350/F-450/F-550 Super Duty or Excursion with 7.3L V8 Diesel Engine
  • Have vehicles equipped with Automatic Transmission (not compatible with manual transmission models)
  • Seek a 100% brand-new, high-quality wiring solution for their diesel truck
  • Require a direct-fit replacement to avoid modification or wiring splicing
  • Want reliable engine electrical performance backed by a 1-year warranty from EGR Performance
  • Need assistance verifying part compatibility (we offer bill of material number checking service via service@egrperformance.com)

Core Advantages

100% Brand-New & Premium Quality

  • High-Standard Construction: 100% brand-new components, manufactured to strict quality standards for reliable performance
  • Durable Materials: Crafted with high-quality insulating materials and conductive wires, resisting under-hood heat, vibration, and moisture
  • Stable Electrical Performance: Ensures consistent signal transmission between engine sensors, actuators, and control modules

Precision Fitment for 1999-2001 Automatic Transmission Models

  • Exact OEM Match: Designed to replace F81Z-12B637-EA exactly, matching the original harness’s connector positions and wiring layout
  • Transmission-Specific Design: Tailored for automatic transmission models, ensuring compatibility with the vehicle’s unique electrical system
  • Wide Model Coverage: Fits all 1999-2001 7.3L Diesel Super Duty (F250-F550) and Excursion, reducing fitment guesswork

Trusted After-Sales Service & Warranty

  • 1-Year Warranty: Backed by EGR Performance’s 1-year warranty, covering manufacturing defects and quality issues
  • Compatibility Verification Service: Provide your bill of material number via service@egrperformance.com for free fitment checking
  • Customer-Centric Support: Strive for 100% customer satisfaction with professional service for fitment, warranty, and installation guidance

Technical Specifications

  • Brand: EGR Performance
  • Product Name: Engine Wiring Harness
  • Replacement Part Number: F81Z-12B637-EA
  • Condition: 100% Brand New
  • Compatible Engine: 7.3L V8 Diesel Engine
  • Compatible Transmission: Automatic Transmission (not for manual)
  • Material: High-quality insulating materials + conductive copper wires
  • Warranty: 1-Year Warranty from EGR Performance
  • Installation Instructions: Not Included (support via service@egrperformance.com)
  • Compatibility Check Service: Available via service@egrperformance.com (provide bill of material number)

Why Choose This EGR Performance Engine Wiring Harness?

For owners of 1999-2001 Ford 7.3L Diesel Super Duty (F250-F550) and Excursion with automatic transmission, this harness is the top replacement choice – here’s why:

  • Targeted Fitment for Your Specific Truck: Exclusively engineered for 1999-2001 7.3L Diesel models with automatic transmission, avoiding universal fitment issues and ensuring seamless integration
  • Brand-New Quality You Can Trust: 100% new construction eliminates the risks of worn, refurbished, or faulty used harnesses, providing reliable performance from day one
  • Direct OEM Replacement Ease: Matches F81Z-12B637-EA exactly, with precise connector positions for hassle-free installation (no modifications needed)
  • Value-Added After-Sales Support: Free compatibility checking via bill of material number and 1-year warranty provide peace of mind for your investment
  • Durable Build for Heavy-Duty Use: Premium materials stand up to the rigors of diesel truck operation – heat, vibration, and moisture – making it ideal for work or daily use
  • Wide Model Coverage: Fits all 1999-2001 7.3L Diesel Super Duty (F250-F550) and Excursion, making it a versatile solution for multiple Ford models

Complete Package Contents

Included:

  • 1 x Complete EGR Performance Engine Wiring Harness

Not Included:

  • Installation instructions (support available at service@egrperformance.com)
  • Tools for harness removal/installation
  • Additional hardware or connectors (uses existing OEM mounting points and connectors)

Compatibility List

Compatible Vehicles (1999-2001, 7.3L V8 Diesel, Automatic Transmission):

  • 1999 Ford F-250 Super Duty 7.3L V8 Diesel Automatic Transmission
  • 1999 Ford F-350 Super Duty 7.3L V8 Diesel Automatic Transmission
  • 1999 Ford F-450 Super Duty 7.3L V8 Diesel Automatic Transmission
  • 1999 Ford F-550 Super Duty 7.3L V8 Diesel Automatic Transmission
  • 1999 Ford Excursion 7.3L V8 Diesel Automatic Transmission
  • 2000 Ford F-250 Super Duty 7.3L V8 Diesel Automatic Transmission
  • 2000 Ford F-350 Super Duty 7.3L V8 Diesel Automatic Transmission
  • 2000 Ford F-450 Super Duty 7.3L V8 Diesel Automatic Transmission
  • 2000 Ford F-550 Super Duty 7.3L V8 Diesel Automatic Transmission
  • 2000 Ford Excursion 7.3L V8 Diesel Automatic Transmission
  • 2001 Ford F-250 Super Duty 7.3L V8 Diesel Automatic Transmission
  • 2001 Ford F-350 Super Duty 7.3L V8 Diesel Automatic Transmission
  • 2001 Ford F-450 Super Duty 7.3L V8 Diesel Automatic Transmission
  • 2001 Ford F-550 Super Duty 7.3L V8 Diesel Automatic Transmission
  • 2001 Ford Excursion 7.3L V8 Diesel Automatic Transmission

Non-Compatible Vehicles:

  • 1999-2001 Ford 7.3L Diesel models with Manual Transmission
  • Ford models outside 1999-2001
  • Non-7.3L Diesel engine configurations
  • Ford trucks not listed in the compatible vehicles section (e.g., F-150, Ranger)
  • Vehicles requiring different OEM part numbers (not F81Z-12B637-EA)
  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).

Does this harness fit my 2000 Ford F-350 Super Duty 7.3L Diesel with automatic transmission?

Yes. This EGR Performance Engine Wiring Harness is specifically designed for 1999-2001 Ford F-350 Super Duty models equipped with the 7.3L V8 Diesel Engine and Automatic Transmission. It’s a direct replacement for OEM part number F81Z-12B637-EA, ensuring perfect fit and functionality.

Will this harness work with a 1999 Ford Excursion 7.3L Diesel with manual transmission?

No. This harness is exclusively compatible with 1999-2001 Ford 7.3L Diesel models with Automatic Transmission. It will not fit models with manual transmission – please confirm your vehicle’s transmission type before purchase.

Can this harness replace OEM part number F81Z-12B637-EA?

Yes. This wiring harness is a direct replacement for OEM part number F81Z-12B637-EA. It matches the original part’s specifications exactly, making it a seamless swap for the factory harness.

How can I verify if this harness fits my truck? I have the bill of material number.

We offer free compatibility checking service! Simply email your bill of material number to service@egrperformance.com, and our team will confirm if this F81Z-12B637-EA replacement harness is suitable for your 1999-2001 Ford 7.3L Diesel model.

Is this engine wiring harness brand-new?

Yes. This EGR Performance Engine Wiring Harness is 100% brand-new. It is not refurbished or used – you’ll receive a fresh, unused part free from wear, corrosion, or pre-existing electrical faults.

Does the package include installation instructions?

No. Installation instructions are not included with the package. However, our dedicated customer service team is available to provide installation guidance and answer any fitment questions. For assistance, please contact us at service@egrperformance.com.

What is covered by the 1-Year Warranty from EGR Performance?

The 1-Year Warranty covers manufacturing defects and quality issues for the 7.3L Powerstroke Engine Wiring Harness. It ensures the harness meets EGR Performance’s high standards for fitment, durability, and electrical performance. The warranty does NOT cover damage from improper installation, misuse, accidental damage, or normal wear and tear. For warranty claims, contact service@egrperformance.com.

Will this harness fit my 2001 Ford F-550 Super Duty 7.3L Diesel?

Yes, as long as your 2001 Ford F-550 Super Duty 7.3L Diesel is equipped with Automatic Transmission. This harness is fully compatible with 1999-2001 F-550 Super Duty 7.3L Diesel automatic transmission models and replaces F81Z-12B637-EA.

Can I install this harness myself, or do I need a professional?

While this is a direct-fit replacement, we recommend professional installation. Engine wiring harness installation involves disconnecting the battery, removing old harness fasteners, and ensuring all new connectors are properly seated – tasks that require specialized knowledge of 7.3L Powerstroke electrical systems. Our team can provide guidance via service@egrperformance.com if needed.

Does this harness fit 1998 Ford F-250 7.3L Diesel models?

No. This harness is exclusively engineered for1999-2001 Ford 7.3L Diesel models. 1998 models have different wiring specifications and require a year-specific harness. Please select the correct harness for your vehicle’s model year.

Warranty & Support

All EGR Performance Engine Wiring Harnesses for 1999-2001 Ford 7.3L Diesel (Automatic Transmission) come with a 1-Year Warranty covering manufacturing defects and quality issues. We strive for 100% customer satisfaction – if you’re unsure about fitment, email your bill of material number to service@egrperformance.com for free compatibility checking. Please note: This product does NOT include installation instructions. For installation guidance, product support, or warranty claims, contact our customer service team at service@egrperformance.com.