Why does Volkswagen require replacing the oil drain plug when changing oil?

1 Answers
Marty
07/30/25 1:23am
Here are the reasons why Volkswagen requires replacing the oil drain plug during oil changes: The oil pan plug gasket in Volkswagen models is made of aluminum. Although it provides good sealing, it is prone to deformation and lacks durability, so it's recommended to replace it during every maintenance service. The reasons for replacing the oil pan plug are as follows: 1. Excessive tightening force can cause deformation of the screw threads, making it impossible for the oil pan plug to tightly engage during subsequent removal and installation, leading to oil leakage. 2. If the oil pan plug is overtightened, the root of the screw may stretch and deform. While the plug may feel tight, the thinned root section can allow oil to seep through. 3. Damage to the oil pan plug gasket. There are generally three types of oil pan plug gaskets: The first type is similar to Ford Focus's rubber gasket, which is recessed inside the oil pan plug and therefore rarely deforms or gets damaged in most cases. The second type is the metal gasket used in Chery Tiggo, which has high strength and basically doesn't deform. The third type is Volkswagen's aluminum gasket, which can deform and leak if excessive installation force is applied.
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