Volkswagen Tiguan engine block porous casting causing oil leak, new engine needed on Volkswagen Tiguan

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Volkswagen Tiguan owners report experiencing serious oil leak issues due to porous engine block casting, which can lead to oil seepage and potential engine damage. This problem can result in low oil levels, engine overheating, and lubrication problems, ultimately risking engine failure if not addressed promptly. In severe cases, owners may find that replacing the engine is the most viable solution to ensure proper vehicle functioning and longevity. It is crucial for these owners to have a qualified mechanic inspect the vehicle to accurately diagnose the source of the oil leak and recommend the best course of action. Regular maintenance, such as monitoring oil levels and checking for leaks, is also advised to prevent major issues like engine block porous casting and to extend the vehicle's lifespan.

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