Subaru OEM Oil Cooler Hose (15-19 WRX) | 99078AB490

Overview

The Genuine Subaru OEM Oil Cooler Hose (Part #99078AB490) is an exact-fit replacement hose designed specifically for the 2015–2019 Subaru WRX. As a factory-original component, this hose ensures proper oil temperature regulation by maintaining a secure, leak-free connection between the oil cooler and engine — protecting your WRX's engine from heat-related wear and maintaining peak performance.

Key Features & Benefits

• Genuine Subaru OEM Quality — Manufactured to factory specifications for guaranteed fit, function, and durability — no modifications required.
• Exact-Fit Replacement — Engineered exclusively for the 2015–2019 WRX, ensuring a perfect drop-in installation with OEM mounting points and hose dimensions.
• Heat & Pressure Resistant Construction — Built to withstand the high-temperature and high-pressure demands of the WRX's turbocharged engine oil cooling system.
• Leak-Free Reliability — OEM sealing surfaces and hose material prevent oil leaks that can result from worn or aftermarket hoses.
• Maintains Engine Longevity — Proper oil cooling is critical to protecting turbocharger and engine bearings; a failed hose can lead to costly engine damage.
• Factory Warranty Backed — Covered under Subaru's genuine parts warranty for added peace of mind.

What's Included

• 1x Genuine Subaru Oil Cooler Hose (Part #99078AB490)

Specifications

Fitment & Compatibility

This oil cooler hose is designed for the following Subaru vehicles:

Always verify your vehicle's VIN and existing part number before ordering to confirm compatibility. If you are unsure whether your specific WRX trim is equipped with an oil cooler, consult your owner's manual or a Subaru dealer.

Installation

This is a direct OEM replacement hose and installs in the factory location without any cutting, splicing, or modification. Basic mechanical experience and standard hand tools are sufficient for most installations; however, it is recommended to allow the engine to cool completely before beginning work and to have the oil system inspected for additional wear during the replacement. Consult a certified Subaru technician if you are unfamiliar with oil system servicing.