OMIX Heater Core Replacement

1999–2004 Jeep Grand Cherokee WJ

Part #: 17901.10

Overview

The OMIX Heater Core Replacement is a direct-fit solution designed specifically for 1999 to 2004 Jeep Grand Cherokee WJ models, including the Laredo, Limited, and Overland trims. This high-quality heater core restores the vehicle’s heating system to optimal performance, ensuring a comfortable cabin environment during cold weather conditions. Built to meet or exceed original equipment standards, it offers a reliable and durable replacement option for worn or leaking heater cores.

Ideal for Jeep owners seeking a dependable and efficient heating system repair, this heater core replacement helps maintain proper engine temperature regulation and passenger comfort. Its compatibility with OE part number 5012691AB guarantees seamless integration without the need for modifications.

Key Features

Engineered to deliver consistent heating performance and long-lasting durability, the OMIX heater core replacement includes the following key features:

• Direct fit for 1999–2004 Jeep Grand Cherokee WJ models (Laredo, Limited, Overland)
• Durable aluminum core and tanks for enhanced heat transfer and corrosion resistance
• Meets or exceeds factory specifications for reliable performance
• Replaces OE part number 5012691AB for guaranteed compatibility
• Restores efficient cabin heating and defrosting capabilities
• Backed by a limited 5-year warranty for peace of mind
• Designed for easy installation with no special tools required
• Helps maintain proper engine cooling system function

Construction & Design

The OMIX heater core features a robust aluminum construction, including both the core and end tanks. Aluminum is chosen for its excellent thermal conductivity, allowing rapid and efficient heat transfer from the engine coolant to the vehicle’s interior. This material also provides superior resistance to corrosion and wear compared to traditional copper or brass cores, extending the service life of the component.

Precision manufacturing ensures that the heater core maintains the exact dimensions and hose connections required for a direct replacement, eliminating fitment issues and reducing installation time. The design supports optimal coolant flow and heat exchange, contributing to consistent cabin warmth and reliable defrost performance.

Installation & Fitment

This heater core replacement is engineered for a straightforward installation process on all 1999–2004 Jeep Grand Cherokee WJ models, including Laredo, Limited, and Overland trims. It fits directly in place of the original heater core without the need for modifications or additional parts. Installation typically involves removing the dashboard or access panels to reach the heater core housing, draining the cooling system, and swapping the old core with the OMIX unit.

Following OEM procedures and recommended safety precautions will ensure a successful installation and restore your vehicle’s heating system to full functionality.

What's Included

• OMIX Heater Core Replacement (Aluminum Core and Tanks)
• Installation instructions (where applicable)

Ideal For

This heater core replacement is ideal for Jeep Grand Cherokee owners experiencing reduced heating performance, coolant leaks inside the cabin, or heater core failure symptoms. It is perfect for those who want a reliable, long-lasting solution that restores factory-level heating efficiency without costly dealership repairs. Whether you drive your Jeep daily or use it for off-road adventures, this heater core ensures comfort and dependable climate control throughout the colder months.

OMIX specializes in replacement and restoration parts for Jeep and Willys platforms, covering everything from body and electrical components to suspension and drivetrain hardware. It’s a go-to source for keeping older Jeeps on the road (and on the trail), especially when you need dependable fitment for repairs, rebuilds, or refresh projects.