Quick answer: Yes — when the repair follows the manufacturer's procedures, uses computerized measuring, and replaces parts the automaker says must be replaced rather than straightened. Modern unibody vehicles are engineered to be repairable; the quality of the shop determines the outcome.
What "frame damage" means on a modern car
Almost every modern car and van is unibody: the “frame” is the whole welded structure of rails, pillars, and rockers, engineered with crush zones that absorb crash energy by design. (Full-frame construction survives mostly in trucks.) When a crash deforms that structure, a proper repair starts with a computerized three-dimensional measuring system that compares dozens of control points against the manufacturer's specifications — not an eyeball and a tape measure.
Pull what's pullable, replace what isn't
Sections bent within allowable limits are pulled back to spec on a frame machine; sections the manufacturer designates as replace-only (many high-strength and ultra-high-strength steels lose their engineered properties when heated or straightened) are cut out and new metal installed, using the exact welds, adhesives, rivets, and backing the OEM body repair manual specifies. Then the geometry is re-measured and documented, the suspension is aligned, and any ADAS sensors are recalibrated, since they assume the body sits exactly where the factory put it.
How to know it was done right
Done this way, the vehicle's crash structure performs as designed in a future collision. Done wrong — heated and yanked high-strength steel, skipped measuring, glued-on cosmetics over bent rails — the car may look perfect and be dangerous. So the real question isn't “is frame damage repairable?” but “is this shop equipped and trained to do it?” Ask to see measuring printouts (before and after), ask whether the shop follows OEM repair procedures, and ask about technician training such as I-CAR.
At Spark Collision Center in Fremont, structural work gets measured, pulled, welded, and documented to spec, and you get the printouts with your invoice. If a vehicle can't be brought back to specification safely, we'll tell you that too — a car we wouldn't put our own families in doesn't leave our shop.