VW Beetle | Reinforcement inner fender under fuel tank, left

VW Beetle | Inner fender reinforcement under fuel tank, left

This reinforcement piece forms the base under your fuel tank and prevents the inner fender from sagging under its weight. Rust often occurs here, especially if the tank leaks and water remains trapped behind the lining. A new one is cheaper than having to replace the entire fender later. Combine this with the right-side piece and your inner walls will be strong again.