Blog · Collision
Side Impact Damage: Doors, Pillars and Rockers
A hit to the side of a vehicle is often deeper than the door. What we look for behind the panels, when a door is repaired or replaced, and why gaps matter.
A side impact is the collision that most often looks smaller than it is. The door takes the visible damage, but the door is bolted to a pillar, the pillar is welded to the rocker and the roof, and all of that can move without leaving much of a mark on the outside. Here is what we look for on a side hit, how a door gets repaired or replaced, and why the gaps are the first thing we check.
The gaps tell the story
Before we look at the dent, we look at the seams around it. The gap between the door and the fender, the door and the quarter panel, the door and the rocker, and the two doors on a four-door. On an undamaged vehicle they are even from top to bottom and match the other side. After a side hit, a gap that has closed at the top and opened at the bottom, or a door that sits proud of the panel behind it, means the door is not the only thing that moved.
That is the difference between a door repair and a structural repair, and it is why we will not quote a side hit off a close-up of the dent. Send the whole side of the vehicle in the photo; here is what we need.
The door itself
A door is a shell with a skin on the outside. Damage to the skin, a dent or crease in the flat, is a repair: metal work, filler where needed, primer and refinish. Damage that has pushed the skin into the intrusion beam inside the door, or bent the door frame around the window, is usually a door replacement. A replacement can be a new door shell or a recycled one from the same model, refinished and fitted with your original glass, latch, handle and interior parts moved over.
A door that will not close properly, or closes with more effort than before, is telling you the frame is bent or the pillar has moved. Do not force it.
Behind the door
When the door comes off at teardown, we look at:
- The B-pillar between the front and rear doors. It carries the door latch and the seat belt anchor, and if it has moved the rear door will never line up.
- The rocker panel below the doors. It is structural, and a rocker that has been pushed in changes how the whole side sits.
- The hinge pillar at the front. A bent hinge pillar means the door hangs wrong no matter how it is adjusted.
- The floor and the seat mounts on a hard hit.
- Side airbag and seat belt components, which may need replacement after a deployment or a hard impact.
Anything found here goes on a supplement to the carrier with photos, and nothing is ordered until it is approved.
Structural work
If the pillar or the rocker has moved, the vehicle gets measured and pulled back to specification before any panel goes on. This is not the glamorous part of the repair, and it is the part that decides whether the doors close right and the tires wear evenly for the rest of the vehicle's life. A shop that skips it and hangs a new door on a bent pillar has produced a vehicle that looks fixed and is not. It is one of the things we do under one roof.
Paint
Side hits usually involve the longest panels on the vehicle, and the door sits between two others. Refinishing a door means blending into the fender and the quarter panel, or into the adjacent door on a four-door, so there is no edge. On a truck, a rear door blends into the bedside. The color is matched off a spray-out card against the vehicle, not just off the code. Here is how the matching works.
Side impacts on work trucks
Crew cabs get side hits at gates, from equipment, and from other trucks in a yard. A door that is dented but works may be left alone on a unit that is staying in service; a door that binds or leaks is fixed. Rockers on lease-road trucks are often already chipped to bare metal, and a side hit on top of that is a good time to do the rocker properly. Fleet work, collision and maintenance together, keeps the unit down once.
Safety
If a side airbag deployed, or the door will not close, the vehicle should not be driven. Call for the tow. If the door closes and the gaps look right, it is usually fine to drive carefully to the shop for an estimate.
FAQ
The door closes but it takes a slam now. What does that mean?
The latch or the striker has moved, or the door frame is slightly bent. Bring it in; it is often adjustable, but it can be the first sign of a moved pillar.
Can you replace just the door skin?
On some vehicles, yes. Skins are available for many models and it is cheaper than a full door when the frame is straight. We will say which applies.
Is a used door a good option?
A recycled OEM door from the same model, refinished and fitted with your parts, is often the best value. See OEM vs aftermarket parts.
How do I get a straight answer on how bad it is?
Drive in to 7033 W 24th St, or text the whole side of the vehicle, the damage close up, and the VIN to (432) 220-3243. The estimate is free.