Bumper repair means fixing scratches, dents, cracks and breaks in a plastic bumper cover so the original part can be reused. Because modern bumpers are plastic covers designed to flex on impact, a lot of damage can be repaired without replacement.
How a bumper is built
The bumper you see is a cover. Behind it sits an energy absorber made of foam or plastic, and a metal reinforcement bar fixed to the body. The cover is held on with clips, brackets and screws. In a light knock the cover can flex and spring back while the parts behind it are damaged — which is why the bumper should be removed and checked from behind before repair.
Damage that can be repaired
- Scratches and scuffs: fixed with surface preparation and paint.
- Dents: plastic can often be returned to shape with controlled heat.
- Cracks: the ends of the crack are stopped and the plastic is welded and reinforced from behind.
- Broken clips and mounts: can be repaired in suitable cases, or the mounting piece replaced.
Plastic welding and reinforcement
The aim of crack repair isn’t just to hide the surface but to restore the part’s strength. The crack line is prepared and joined using a method suited to the bumper material, with reinforcement on the back where needed. Filler on the surface alone isn’t enough — vibration and temperature changes can make the crack reappear.
Painting
Plastic needs different preparation from metal. Primers and products suited to plastic are used so the paint adheres, and because bumpers flex, the paint system needs to cope with that flexibility. See our car painting page for details of the paint stage.
Sensors and radar
Many bumpers carry parking sensors, and some cars have driver-assistance radar behind the bumper. Sensor housings must stay in the right position, and any paint over sensor surfaces should follow the manufacturer’s guidance. Some manufacturers set specific conditions for repairs and paint in front of the radar; radar calibration may also be needed.
When replacement is needed
- The bumper is shattered or large pieces are missing
- There are many long cracks
- Most of the mounting points are broken
- There is structural damage around the radar or sensors
We can give you a first view from photos of whether your bumper can be repaired. See our body repair and accident repair pages, or use the quote form.
