Rocker Panel (Sill) Corrosion
Symptoms
The sills that run beneath the doors become perforated from the inside out. By the time external rust is visible, the inner structure is often severely compromised.
Cause
The rocker panels are double-skinned box sections that trap moisture between the inner and outer layers. Road spray, condensation, and water ingress from failed targa seals all contribute. The 914's low ride height means the sills take more road spray than most cars.
Fix
Full sill replacement involves cutting out the outer skin, assessing the inner structure, replacing corroded sections, and welding in new metal.
Complete sill repair panels are available.
Cost: $2,000-$5,000 per side.
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