Vehicle-Body Repair Standards and OEM Procedure Compliance
This domain is compliance. The exam tests whether you treat the OEM procedure as the sole authority for a repair and whether you can spot the shortcuts that void it.
The hierarchy
The OEM procedure governs weld type, count, spacing, wire, gas, sectioning location, adhesive, and corrosion protection. Industry training, I-CAR courses, and "common practice" do not override it. Position statements clarify specific topics but never expand what the procedure allows.
Sectioning and joining
Section only where the OEM permits, use the specified joint type, and reproduce the original weld count and spacing. Where a procedure calls for squeeze-type spot welds plus structural adhesive, both are required - adhesive is structure, not sealant. Replace welds with the same type; do not substitute plug welds for STRSW unless the procedure allows it.
Heat and corrosion protection
Boron and some UHSS parts carry heat restrictions; straightening with heat can destroy the microstructure. Coatings, sealers, and cavity wax must be restored after welding or the repair corrodes from the inside out.
Worked example
A procedure specifies 24 STRSW at 25 mm spacing plus adhesive on a quarter panel. A tech installs 12 welds and no adhesive. Reasoning: weld count and adhesive are a validated load path; halving the welds and deleting the adhesive reduces joint strength and fatigue life, and the repair is non-compliant even though it looks finished. Documented procedure compliance is the deliverable.
Traps
Using "industry standard" spacing instead of the OEM's; heating boron to straighten; skipping corrosion protection; assuming an updated procedure revision does not apply to the job in front of you.