One Stop Solutions 99086 HVAC Heater Core - Rear

Rear Heater Core for Toyota Highlander

This One Stop Solutions HVAC heater core is a direct replacement for the rear heating circuit in 2008-2013 Toyota Highlander models. Part number 99086 is built to OE form and function with aluminum construction and pressure testing for fit and leak control.

Key Features

• Fits 2008-2013 Toyota Highlander, rear
• One Stop Solutions part number 99086
• Aluminum heater core construction
• Cadmium-plated tubes inside and out to resist premature failure
• Individually pressure tested before release
• Includes foam and related accessories for installation
• Direct replacement for copper-designed heater core applications

Detailed Description

Designed for the rear HVAC system, this heater core restores heat transfer performance in Toyota Highlander vehicles from 2008 through 2013. The aluminum core is engineered to match original equipment form and function, while the plated tubes help reduce corrosion-related failure. If you need a rear heater core for a 2008-2013 Toyota Highlander, part number 99086 provides an OE-style replacement built for the application.

This part cross-references APDI 9010559 and Dorman - HELP 99378 for the same application.

Common Issues This Part Can Address

• Weak or inconsistent rear cabin heat
• Coolant odor inside the vehicle
• Coolant seepage from the heater core area
• Restricted heat output caused by internal core failure
• Need for a rear HVAC heater core replacement on a Toyota Highlander

Installation Notes and Tips

Verify rear HVAC fitment by year and position before installation. Inspect hoses, seals, and surrounding HVAC components for wear or contamination during replacement. Flush the cooling system if coolant condition indicates debris or corrosion, and confirm the system is properly bled after service.

Quality Assurance

Each heater core is individually pressure tested, and the unit includes foam and accessories specified by the manufacturer. OSC Premium heater cores are built from aluminum as a direct replacement for copper-designed heater core applications.