Repair wins for scuffs and small cracks; replace wins once tabs and structure are gone
The bumper you see is a painted plastic cover, and plastic repairs well when the damage is shallow. Scuffs from a parking pillar, a scrape from a snow windrow, a dent pushed in by a low-speed tap on the DVP, a crack a few centimetres long: all of these are sanded, plastic-welded or filled, re-textured where needed and painted, and the labour for that is usually less than the price of a new cover plus the labour to fit it.
The balance tips when the plastic is torn rather than cracked, when the crack runs through a sensor hole or a mounting point, or when more than a couple of the tabs that clip the cover to the fender and the lower valance are snapped. Tabs can be rebuilt, but past a certain count the rebuilding time exceeds the cost of a cover, and a cover that no longer sits flush is a repair nobody is happy with.
Then look behind the cover. If the impact bent the reinforcement bar or crushed the absorber, those parts are replaced regardless, and at that point the cover itself is usually replaced too, because the labour to remove it is already being spent.
Paint is the same either way, and it is often the biggest line
A new bumper cover arrives in black primer or raw plastic and has to be prepped and painted, just like a repaired one. On a metallic or pearl colour it also usually needs a blend into the fenders and the hood or trunk edge so the corners match. That means the refinish line on the estimate does not change much whether the cover is new or repaired, and it is often the largest single item.
What does change is the balance between labour and parts. A repair is mostly hours; a replacement is a part price plus fewer hours. On an older, common car with cheap covers on the shelf, replacement can beat repair even for moderate damage. On a newer vehicle with an expensive cover, or one with integrated trim, chrome inserts and sensor housings, repair earns its keep well past the point where it would on a base model.
Pre-painted aftermarket covers exist and some shops use them to skip the booth. The colour is close but not blended, so the corners show against the fenders, and we do not fit them where the customer wants a finish they cannot find.
One line that surprises people on a replacement estimate is the transfer work. A new cover arrives bare, so every grille, fog-light bezel, reflector, sensor, tow-hook cap and trim strip has to come off the old one and go onto the new, and the clips that break on the way are added as small parts. On a base-model cover that is a short job; on a cover with a full-width lower grille, a licence-plate bracket and six sensors it is an hour or two that a repair never spends. When a cover is only marginally past repair, that transfer time is sometimes what keeps the repair the cheaper route.
Sensors, cameras and availability can decide it for you
Many bumpers now carry parking sensors, a radar unit for adaptive cruise, blind-spot modules and sometimes a camera. A repaired cover has to keep every sensor in exactly its original position, and the plastic in front of a radar unit has to stay the right thickness, because filler or extra paint over it can throw off the reading. On a bumper with radar behind the repaired area, replacement is often the safer call, and recalibration may be required either way.
Parts availability cuts the other direction. If the cover for your car is on backorder for weeks, a good repair gets you back on the road now and looks the same when it is done. Recycled covers in the right colour from a salvage vehicle are a third option on common models, though they still need paint to match the car beside them.
The insurance company generally writes for repair when the shop judges it feasible, because it is cheaper for them. That is fine when the repair will be invisible and safe; where it will not be, we write up why and ask for the replacement.
How we decide on your bumper
Photograph the bumper, including one shot straight on at any sensor or grille near the damage. Our estimator will tell you, usually the day the pictures arrive, whether the cover is a repair or a replacement, what is likely behind it, and whether a blend into the fenders is needed. If the cover has to come off to be sure, that teardown is part of the repair when you stay with us.
For a cracked cover you are driving on now, the situation page on cracked bumpers covers whether it is safe to keep going and what to watch for.
Questions people ask
Can a cracked bumper be repaired or does it always need replacing?
Cracks up to roughly a hand-length in the body of the cover repair well with plastic welding and a backing mesh. Cracks at the corners, through mounting points or across sensor holes usually mean a new cover.
Will a repaired bumper look different from a new one?
Not when it is done properly. Both are painted and blended the same way, and the texture of any lower unpainted section is restored on a repair.
Is a used bumper cover a good option?
On a common model in the same colour it can be, and it is cheaper than new. It still needs to be painted to match your car, so the saving is in the part, not the paint.
Why did the shop replace the absorber when only the cover looked damaged?
The foam absorber behind the cover is a single-use part: it does its job by crushing. Once it is compressed or split it cannot absorb the next hit, so a crushed one is replaced even when the cover in front of it repairs cleanly.