One Stop Solutions 13188 Radiator - Main

OE-Style Radiator for Audi Cooling Systems

One Stop Solutions Part Number 13188 is a premium replacement radiator built for OE form and function. It is engineered for Audi applications that need dependable engine cooling and, where equipped, transmission fluid cooling in a direct-fit design.

Key Features

• Premium aluminum radiator construction with plastic tanks
• Crossflow design with a 1-row core
• Core dimensions: 28 3/8 in. height, 18 7/16 in. width, 7/8 in. thickness
• 1 1/4 in. inlet and 1 1/4 in. outlet diameters
• Transmission oil cooler included; engine oil cooler not included
• Plated transmission cooler design with 11 13/16 in. fitting spacing
• Individually pressure tested during production
• Die-cut gasket design for leak resistance

Detailed Description

This One Stop Solutions radiator is built to match OE-style fit and function for select Audi A4, A4 Quattro, A4 allroad, A5, A5 Quattro, A6, A6 Quattro, allroad, and Q5 models. Part number 13188 uses premium-grade materials and a crossflow layout to support stable coolant flow, while the integrated transmission oil cooler helps maintain fluid temperature on applications that require it. The radiator is engineered with factory-style mounting and component placement for a clean installation and proper fit in the engine bay.

This part cross-references APDI 8013188 and Spectra Premium CU13188 for the same application.

Common Problems This Radiator Helps Address

• Overheating caused by a leaking or restricted radiator
• Coolant loss from cracked tanks or worn seals
• Transmission fluid temperature issues on vehicles with a built-in cooler
• Reduced cooling efficiency from aged core materials
• Fitment problems from non-OE-style replacement radiators

Installation Notes and Tips

Compatible With 2009-2016 Audi A4, N/A; 2009-2016 Audi A4 Quattro, N/A; 2013-2016 Audi A4 allroad, N/A; 2010 Audi A5, N/A; 2012-2017 Audi A6, w/TOC; 2013-2016 Audi A6 Quattro, w/TOC; 2013-2016 Audi allroad, N/A; 2010-2017 Audi Q5, N/A; 2013-2017 Audi A5 Quattro, N/A; 2012-2016 Audi A5, N/A; 2013-2016 Audi Q5, Main.

Verify inlet and outlet hose sizes, cooler line routing, and mounting points before installation. Flush the cooling system, inspect related hoses and clamps, and confirm the transmission cooler connections are clean and properly seated before filling and bleeding the system.

Quality Assurance

OSC radiators are produced with enhanced cooling components and are tested multiple times during manufacturing, including cooler testing before tank installation, core testing before assembly, and a final assembled-unit test. The design also incorporates improvements aimed at addressing common failure points in higher-mileage vehicles.