Quote:
Originally Posted by cRiPpLe_rOoStEr
Some modern bumpers may look undamaged, but the "crash box" covered by the plastic or rubber external lining won't flex back into place. Not sure if this also applies to US-spec variants of models available with different bumpers in other markets.
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No, the Styrofoam won't flex back after a 5 mph impact. That means the next 5 mph hit will flex the bumper again and farther and likely lead to more cosmetic damage.
The safety structures are deeper and very unlikely to be damaged in an impact that doesn't leave physical evidence.
Our 2005 Prius was hit from behind twice within a few months. Both times while my wife was sitting at a stop sign or traffic light. Both times we took it to a repair shop for the insurance estimate and the shop wanted to replace the foam and bumper cover for about $700. Both times we took the insurance money and put it in the bank. The second impact left some cracks in the paint but nothing structural.