Features and Benefits:

• Precision M63 x 3 Buttress Threading: Provides a secure, tight seal required for accurate cooling system pressurization and testing.
• Extensive VW, Audi, Porsche, and Lamborghini Coverage: Applicable to Audi A3‐A8, Q3‐Q7, TT, Volkswagen Golf, Jetta, Atlas, Passat, Tiguan, Touareg, Porsche Cayenne, Macan, and Lamborghini Aventador and Gallardo models.
• Engineered for Professional Cooling System Diagnostics: Ideal for leak detection, system integrity checks, and pressurization of modern European cooling systems.
• Durable, Workshop-Grade Construction: Built to withstand repeated use in demanding automotive service environments
• Ensures Accurate, Repeatable Test Results: Maintains a stable seal during pressure testing to support precise diagnostics and efficient maintenance workflows.



The FZ41 cooling system tank adapter features an M63 x 3 buttress-threaded design engineered for accurate pressurization and diagnostic testing of modern cooling systems found in Volkswagen, Audi, Porsche, and select Lamborghini applications. Designed for models ranging from 1998 through 2021, including Audi A-series, Q-series, TT, Volkswagen Golf, Jetta, Tiguan, Touareg, and Porsche Cayenne and Macan, this adapter provides a secure and leak-free connection for cooling system pressure tests. Its durable construction and precise thread machining ensure reliable performance for technicians performing leak detection, coolant system servicing, and expansion tank diagnostics across a wide range of European vehicles.