One Stop Solutions 2590 Radiator

OE-Style Cooling Replacement for Audi

This OSC Premium New Automotive Radiator is built for OE form and function, with a crossflow design, plastic tanks, and a premium aluminum core. It is engineered for direct replacement service on select Audi A4, Audi A4 Quattro, and Audi A6 Quattro applications, including part number 2590.

• Fits 2002-2008 Audi A4
• Fits 2002-2009 Audi A4 Quattro
• Fits 2002-2004 Audi A6 Quattro
• Crossflow radiator design with 1-row core construction
• Core dimensions: 24 7/8 in. height, 17 1/4 in. width, 1-1/4 in. thickness
• 1 1/4 in. inlet and outlet diameters
• Transmission oil cooler included with plated cooler type
• Plastic tank construction with premium-grade aluminum core materials

Detailed Product Overview

Part number 2590 is designed as a direct-fit radiator replacement for Audi cooling systems that require OE-style fit, finish, and performance. The unit uses premium-grade aluminum construction with cadmium-plated tubes inside and out to help resist premature failure, while the die-cut gasket design supports a tighter seal at the tank-to-core interface. OSC also pressure tests each radiator during production and uses factory-spec component placement and torque procedures to help maintain consistent fitment.

This radiator includes a transmission oil cooler and is built to match original cooler design where equipped. For Audi A4, Audi A4 Quattro, and Audi A6 Quattro owners searching for a radiator replacement by part number 2590, this unit provides the dimensions and cooling layout needed for a straightforward service repair.

Common Problems This Radiator Can Address

• Coolant leaks from a cracked or aging radiator tank
• Overheating caused by restricted or inefficient heat transfer
• Transmission fluid temperature concerns related to a failing cooler circuit
• Corrosion or internal wear in the original radiator core
• Poor sealing at the tank-to-core connection

Installation Notes and Tips

Verify core dimensions, inlet and outlet sizes, and cooler layout before installation. This radiator is a crossflow design with 1 1/4 in. inlet and outlet connections, so matching hose routing and cooler line placement is important during replacement. Inspect related hoses, clamps, and coolant condition before installing the new unit to reduce repeat service.

For fitment confirmation, use the vehicle listing exactly as shown: Fits 2002-2008 Audi A4, Fits 2002-2009 Audi A4 Quattro, and Fits 2002-2004 Audi A6 Quattro. Part number 2590 is also cross-referenced to APDI 8012590 for the same application.

Quality Assurance

OSC states that each complete radiator is tested multiple times during production, including cooler testing before tank installation, core testing before assembly, and final assembly testing. The design also incorporates engineering updates aimed at improving durability and cooling performance in higher-mileage vehicles.