In all models and versions of the VW Vanagon, the rear suspension arms are attached to the body using 12 mm thin metric bolts and large washers.
These are not universal washers, but washers specially developed by Volkswagen, which may not be replaced by different washers.
It's not only the dimensions that are important, but also the hardness of the washers, they must not be deformed when tightened.
In the event of excessive rust or deformation, they must be replaced.
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