Mishimoto Engine Oil Cooler Kit

2007–2011 Jeep Wrangler JK 3.8L V6

Part #: MMOC-WRA-07

Overview

The Mishimoto Non-Thermostatic Engine Oil Cooler Kit is a precision-engineered cooling solution designed specifically for Jeep Wrangler JK models equipped with the 3.8L V6 engine from 2007 to 2011. Built to withstand the rigors of off-road adventures, towing, and high-performance driving, this oil cooler kit helps maintain optimal engine oil temperatures, reducing the risk of premature oil breakdown and engine wear.

By lowering oil temperatures by up to 40°F, this kit enhances engine reliability and longevity, ensuring your Jeep’s powertrain stays protected under extreme conditions. It is an essential upgrade for Jeep enthusiasts who demand consistent performance and durability from their Wrangler JK during intense driving scenarios.

Key Features

Combining durable materials with a direct-fit design, the Mishimoto Oil Cooler Kit delivers superior cooling efficiency and straightforward installation. Key features include:

• Direct-fit compatibility for 2007–2011 Jeep Wrangler JK 3.8L V6 engines
• Pre-made braided stainless steel oil lines with high-quality -AN fittings for secure, leak-free connections
• Billet aluminum oil sandwich plate available in non-thermostatic or thermostatic versions for precise oil temperature management
• Application-specific mounting brackets engineered for a secure, no-modification installation
• Adds 0.65 quarts to total oil capacity, increasing thermal mass and cooling efficiency
• Reduces oil temperatures by up to 40°F while maintaining minimal pressure drop to protect engine components
• Compatible with Mishimoto Jeep JK transmission cooler kit and all-aluminum radiator for a comprehensive cooling system upgrade
• Includes all necessary hardware for a hassle-free installation
• Backed by Mishimoto’s lifetime warranty for long-term peace of mind

Construction & Design

The Mishimoto Oil Cooler Kit is constructed from high-grade billet aluminum and stainless steel to ensure exceptional durability and corrosion resistance in harsh off-road environments. The oil sandwich plate is precision-machined to provide a perfect seal and optimized oil flow, while the braided stainless steel lines offer excellent flexibility and protection against abrasion and heat.

Custom-designed mounting brackets fit the Jeep Wrangler JK chassis precisely, enabling a direct-fit installation without the need for cutting or welding. This thoughtful engineering guarantees a secure fit and reliable performance even under the most demanding driving conditions.

Installation & Fitment

Installation is straightforward thanks to the vehicle-specific design and inclusion of all necessary hardware. The direct-fit mounting brackets and pre-made oil lines simplify the upgrade process, allowing most users to complete installation with basic hand tools. No modifications to the vehicle are required, preserving the integrity of your Jeep.

This oil cooler kit fits the following Jeep Wrangler JK models with the 3.8L V6 engine:

• Jeep Wrangler 3.8L 42RLE (2007–2011)
• Jeep Wrangler 3.8L NSG370 (2007–2011)
• Jeep Wrangler 70th Anniversary (2011)
• Jeep Wrangler Rubicon (2007–2011)
• Jeep Wrangler Sahara (2007–2011)
• Jeep Wrangler Sport (2010–2011)
• Jeep Wrangler Unlimited 70th Anniversary (2011)
• Jeep Wrangler Unlimited Rubicon (2007–2011)
• Jeep Wrangler Unlimited Sahara (2007–2011)
• Jeep Wrangler Unlimited Sport (2010–2011)
• Jeep Wrangler Unlimited X (2007–2010)
• Jeep Wrangler X (2007–2010)

What's Included

• Billet aluminum oil sandwich plate (non-thermostatic version)
• Pre-made braided stainless steel oil lines with durable -AN fittings
• Application-specific mounting brackets
• All necessary installation hardware
• Detailed installation instructions

Ideal For

This Mishimoto Oil Cooler Kit is ideal for Jeep Wrangler JK owners who frequently engage in off-road driving, towing, or high-performance use where engine oil temperatures can rise rapidly. It is also an excellent choice for those upgrading their cooling system alongside Mishimoto’s transmission cooler and all-aluminum radiator to achieve comprehensive thermal management and enhanced engine protection.

Mishimoto is a performance cooling brand offering aluminum radiators, intercoolers, oil coolers, hoses, and supporting hardware built to manage heat on hard-driven street and track vehicles. For boosted setups and towing/off-road rigs alike, Mishimoto upgrades are designed to increase cooling capacity and reliability where factory systems can become a limitation.