Global Parts 2511235 Turbocharger

Turbocharger for Audi A4 and Passat

Restore boost response and turbo performance with this Global Parts turbocharger, part number 2511235. It is built with a cast iron housing, journal bearings, water-cooled center housing, and an included wastegate actuator for OE-style service on select Audi A4, Audi A4 Quattro, and Volkswagen Passat applications.

Fits 1997-2006 Audi A4, N/A. Fits 1997-2005 Audi A4 Quattro, N/A. Fits 1998-2005 Volkswagen Passat, N/A.

Key Features

• Cast iron construction with an uncoated finish
• Water-cooled center housing for thermal management
• Journal bearing design for standard turbocharger service
• Single turbocharger configuration
• Turbocharger model family: K03/K04
• Wastegate actuator included with vacuum-operated wastegate/blow-off valve
• Gasket or seal included
• Mounting hardware and mounting bracket not included

Detailed Description

Global Parts 2511235 is a replacement turbocharger for turbocharged Audi A4, Audi A4 Quattro, and Volkswagen Passat models listed in the fitment data. The cast iron housing and water-cooled center section support heat control in demanding engine bay conditions, while the journal bearing layout matches common OE-style turbo service requirements. The unit is identified as a K03/K04 model family turbocharger and includes a wastegate actuator for proper boost control. This part cross-references BorgWarner (e.g., 53039880005, 53039880029) for the same application.

Common Problems This Part Can Address

• Low boost or delayed boost response
• Turbo shaft wear or bearing noise
• Oil leakage from a worn turbocharger assembly
• Faulty wastegate operation affecting boost control
• Loss of power caused by turbocharger failure

Installation Notes and Tips

Before installation, change the engine oil as noted in the fitment data. Inspect oil supply and return lines, intercooler plumbing, and related seals for contamination or restriction before installing the new turbocharger. Verify actuator operation and confirm all mating surfaces are clean and free of debris. Because mounting hardware is not included, reuse or source the required fasteners as needed for the vehicle.

Quality Assurance

This Global Parts turbocharger is a regular-grade replacement component built to match the listed OE-style applications for Audi A4, Audi A4 Quattro, and Volkswagen Passat models. Part number 2511235 is intended for direct replacement use within the confirmed fitment range.