One Stop Solutions 98031 HVAC Heater Core - Rear

Rear Heater Core for Toyota and Lexus

Restore rear cabin heat with this OSC Premium new HVAC heater core, part number 98031. It is built for direct OE-style replacement in select Toyota Land Cruiser, Lexus LX470, and Toyota 4Runner rear heater applications.

Key Features

• Premium aluminum construction for OE form and function
• Cadmium-plated tubes inside and out to help resist premature failure
• Individually pressure tested before release
• Foam and related accessories included as supplied by the manufacturer
• Direct replacement for copper-designed heater core applications

Detailed Description

OSC Premium heater core 98031 is engineered for rear HVAC service in 1996-2002 Toyota 4Runner, 1998-2007 Lexus LX470, and 1998-2008 Toyota Land Cruiser models. The aluminum core design follows original equipment form and function, while the plated tubes add corrosion resistance for long-term heating system service. This part cross-references 93031 and 399290 for the same application.

What It Helps Fix

• Weak or uneven rear heat output
• Coolant seepage from a failing rear heater core
• Fogging or sweet coolant odor inside the cabin
• Heating performance loss in rear HVAC systems
• Corrosion-related heater core failure

Installation Notes and Tips

Compatible With 1996-2002 Toyota 4Runner, rear; 1998-2007 Lexus LX470, rear; and 1998-2008 Toyota Land Cruiser, rear. Verify the rear HVAC layout and compare the original core before installation. Flush the cooling system and inspect hoses, seals, and clamps so the replacement heater core can operate with clean coolant flow.

Quality Assurance

Each OSC heater core is pressure tested individually before packaging. The aluminum construction and plated tubes are used to support OE-style durability in rear heater service.