Sill Corrosion
Symptoms
The rocker panels soften, crumble, and lose structural integrity.
Cause
Box-section sills trap water when drain holes block. The corrosion process is identical to that described in British cars, though the Toyota steel generally resists longer.
Fix
Full sill replacement.
Repair panels may need to be fabricated as supply is limited.
Cost: $1,000--2,500 per side.
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