OMIX Coolant Overflow Bottle

2007–2011 Jeep Wrangler JK 3.8L V6

Part #: 17103.06

Overview

The OMIX Coolant Overflow Bottle is a direct replacement part designed specifically for Jeep Wrangler JK models from 2007 to 2011 equipped with the 3.8-liter V6 engine. Engineered to meet or exceed factory specifications, this coolant reservoir ensures your vehicle’s cooling system maintains optimal fluid levels and pressure. Whether you’re performing routine maintenance or repairing a damaged overflow bottle, this OEM-quality replacement helps keep your Jeep running reliably and efficiently.

Built for Jeep enthusiasts and professional mechanics alike, the OMIX coolant overflow bottle offers a hassle-free solution to coolant system issues caused by cracks, leaks, or wear. Its precise fitment guarantees seamless integration with your Wrangler’s existing cooling components, preserving the integrity and performance of your engine’s thermal management system.

Key Features

This replacement coolant overflow bottle combines durability and functionality to support your Jeep’s cooling system:

• Exact fit for 2007–2011 Jeep Wrangler JK models with 3.8L V6 engines
• Meets or exceeds original equipment (OE) quality standards for reliable performance
• Includes tethered cap to prevent loss and ensure secure sealing
• Comes with inlet hose for easy connection to the cooling system
• Constructed from high-quality, heat-resistant plastic to withstand engine bay conditions
• Replaces OE part number 55056542AE for guaranteed compatibility
• Prevents coolant loss and helps maintain proper engine temperature
• Designed for straightforward installation without modifications

Construction & Design

The OMIX coolant overflow bottle is crafted from durable, heat-resistant plastic engineered to endure the high temperatures and pressures typical of an engine’s cooling system. Its robust construction resists cracking and warping over time, ensuring long-lasting service life. The tethered cap design provides convenience and security, preventing accidental loss during maintenance. The included inlet hose is designed for a tight, leak-free connection, maintaining system integrity and preventing coolant contamination.

Installation & Fitment

Installation of the OMIX coolant overflow bottle is straightforward and requires no special tools or modifications. It is designed as a direct replacement for the factory reservoir on 2007–2011 Jeep Wrangler JK models with the 3.8L V6 engine. Simply remove the old reservoir and install the new bottle using the existing mounting points and hoses. The included tethered cap and inlet hose simplify the process, allowing you to restore your cooling system quickly and efficiently.

What's Included

• Coolant overflow bottle
• Tethered cap
• Inlet hose

Ideal For

This OMIX coolant overflow bottle is ideal for Jeep Wrangler JK owners seeking a reliable, OEM-quality replacement part to maintain or restore their vehicle’s cooling system. It is perfect for those performing routine maintenance, repairing leaks, or upgrading worn components to ensure optimal engine temperature control and prevent overheating. Whether you use your Wrangler for daily driving, off-road adventures, or weekend cruising, this replacement reservoir helps keep your engine running cool and protected.

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.