Denso 221-0508 Radiator

Denso Radiator for Toyota 4Runner

The Denso 221-0508 radiator is built for 1996-2002 Toyota 4Runner applications and follows OE-style dimensions for proper cooling system fitment. With a 22.7500-inch core height, 25.0620-inch core width, and 1.2500-inch core thickness, it is sized to match the factory cooling layout while supporting dependable engine temperature control.

Key Features

• Fits 1996-2002 Toyota 4Runner, N/A
• Part number 221-0508 for direct catalog reference
• Transmission oil cooler included
• Core dimensions: 22.7500 in. height x 25.0620 in. width x 1.2500 in. thickness
• 1.3750 in. inlet and outlet diameters
• OE-based radiator configuration for fitment consistency

Detailed Description

Denso radiators are supplied to OE car makers worldwide, and this radiator reflects that engineering approach with factory-matched tank design, fin pitch, core sizing, and material selection. The 221-0508 is built for Toyota 4Runner cooling system service where correct fit, stable coolant flow, and heat transfer performance matter. This part cross-references Spectra Premium (e.g., CU1998) for the same application.

Common Cooling System Issues

• Overheating from a restricted or leaking radiator
• Coolant loss caused by cracked tanks or worn seams
• Poor heat rejection from a damaged or clogged core
• Transmission cooling concerns when the radiator cooler circuit is compromised
• Fitment problems after replacing an incorrect or non-OE-style unit

Installation Notes and Tips

Verify core dimensions, inlet and outlet size, and transmission cooler routing before installation. Flush the cooling system, inspect hoses and clamps, and confirm the radiator mounts and fan shroud alignment on the Toyota 4Runner before filling with the correct coolant mixture. After installation, bleed air from the system and check for leaks at all hose and cooler connections.

Quality Assurance

Denso states that its radiators are built to OE standards and undergo durability and function testing before release. That manufacturing approach supports consistent performance and fitment for 1996-2002 Toyota 4Runner cooling system service.