Cars have become markedly safer and collisions less frequent, yet insurance costs have not fallen in proportion. The explanation lies in what a repair now involves rather than in how often one is needed.
A premium prices frequency multiplied by severity
Insurers estimate how often a claim is likely to occur and how much it will cost when it does. The premium reflects the product of those two figures plus expenses.
Safety technology has reduced frequency, particularly for low-speed collisions, because automatic braking intervenes in exactly the situations that generate the most claims.
Severity has moved in the opposite direction and by a larger factor, so the product has risen even as the roads have become safer.
Sensors live where damage happens
Radar units, cameras and ultrasonic sensors are mounted in bumpers, grilles, windscreens and door mirrors, which are precisely the components damaged in minor impacts.
A bumper that once required a paint and refit now requires replacement of the components behind it, each of which is an electronic assembly rather than a moulding.
Even a windscreen replacement has become a more involved job, because a forward-facing camera mounted behind it must be recalibrated afterwards.
Calibration is a cost with no visible result
Driver assistance systems must be aimed precisely, and after any repair affecting their mounting the vehicle must undergo a defined calibration procedure.
That procedure may require a level floor, specific targets at measured distances, and manufacturer software, which many general repairers do not have.
The result is invisible to the owner, who sees a bill including labour for work that produced no change they can perceive.
Materials narrowed the repair options
Aluminium panels, high-strength steels and composite structures cannot be repaired with the techniques used on mild steel, and some sections must be replaced rather than straightened.
Manufacturers specify repair methods, and departing from them can invalidate the structural integrity of the vehicle, so bodyshops follow them closely.
Investment in equipment and training concentrates this work in fewer approved shops, which reduces competitive pressure on labour rates.
Where the pressure shows up first
Vehicles with expensive sensor arrays and specialised materials see the effect most strongly, which is why premiums for otherwise similar cars can diverge sharply.
Parts availability affects cost as well, since a vehicle waiting for a component accumulates a replacement vehicle cost that the insurer bears.
Insurers publish group ratings based on repair testing, and those ratings are why an apparently modest car can attract a surprisingly high premium.