Repair or replace: how the decision is made in a damage assessment

When a knock is assessed, one of the first decisions is what to do with each damaged part: repair it or replace it? It is not an arbitrary choice, nor is it purely about price. Safety, the type of material, the extent of the damage, labour time and, where insurance is involved, the loss adjuster's assessment all play a part. Understanding these criteria helps you see why one option or the other appears in your quote.

First of all: safety

Some parts exist mainly to protect the occupants in an accident. The crumple zone is designed to absorb the energy of a crash by deforming in a specific way. If a reinforcement or chassis rail of this kind has been bent, manufacturers usually state whether it can be repaired or must be replaced, and where it may be cut or joined. Following those instructions is not optional: they determine whether the car will behave as it should in a future impact.

In these cases the work is also carried out with the car on the chassis jig, checking reference measurements before and after, and reproducing the original joints, for example with spot welding or riveting as appropriate.

The damage: size, location and material

• Size and depth. A gentle dent in the middle of a door usually repairs well. A panel with sharp creases, stretched metal or several damaged areas may not recover its shape or strength.
• Location. Edges, swage lines and double-skinned areas are harder to repair than a flat surface.
• Material. Steel, aluminium and plastics are worked in different ways. Many plastic bumpers can have cracks and breaks repaired; other items, such as some brackets or mountings, cannot.
• Existing corrosion. If the part was already rusty, repairing it may not be the best option.

Time and cost

Repairing usually saves the cost of a new part but takes labour hours. Replacing means buying the part but may take less labour. When a repair needs so many hours that it costs more than replacement, the sensible choice is to replace. Insurers and loss adjusters use a repair time schedule with reference times that help make that comparison objectively.

Availability matters too: if a part takes a long time to reach the Canary Islands, it may make sense to repair it when that is technically possible and the result will be sound.

The quality of the result

The final decision must ensure the car is left right: with the shape, fit and protection it had before. A properly repaired part need not be any worse than a new one. But a forced repair, with too much filler or metal that has not regained its shape, can cause problems over time.

And the environment

Repairing, when it is safe and the result is good, produces less waste than replacing. It is one of the reasons why, at our workshop, we always consider repair as the first option when it is viable.

If you have had an accident and want a clear, well-reasoned assessment, bring your car to us in Las Chafiras. We take care of dealing with your insurer, and if you represent an insurer, you can see how we work on our page for insurers.