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Front End damage: what breaks behind the bumper and how to judge the depth

Front End is the most common damage label. We explain the order in which front-end parts fail, which components hide behind the bumper and how to judge the depth of an impact from photos.

VinWind · Updated · Illustration: 3D model, not a photo of a real car

A car's front end is built to absorb an impact: parts fail one after another, from the bumper to the firewall. A scratch on the outside can hide a whole cascade: reinforcement bar, radiators, headlight brackets, radar and frame rails. The key question is not what you can see, but which layer the force reached.

Front-end layers from a light to a heavy impact

Typical order for cars and crossovers; the exact parts depend on the model
DepthUsually damagedSigns on photos
1. CoverBumper cover, grille, plate holder, lower grille meshCracked or dented plastic, bumper gaps still even
2. AbsorbersFoam absorber, bumper reinforcement, bumper brackets, parking sensorsBumper shifted, metal reinforcement visible, uneven gaps to the fenders
3. Front panelRadiator support, headlights and their brackets, hood latch, adaptive cruise radarHeadlight knocked out or tilted, hood does not sit flush, hood buckled in the middle
4. CoolingA/C condenser, radiator, intercooler, fanCoolant traces under the car, crushed condenser visible through the grille
5. StructureFront frame rails, aprons, subframe mountsFender pushed back, door gap out of line, dent in the rail below the headlight
6. Cabin and powertrainAirbags, seat-belt pretensioners, engine mounts, firewallDeployed airbags on interior photos, SRS warning on the dashboard

What hides even behind a light impact

  • The adaptive cruise radar sits behind the badge or in the lower grille. Even with an intact mount its angle can shift, so it needs calibration after repair. More in Radars and ADAS cameras.
  • Headlight brackets: the headlight may be intact while its mounting tabs are broken. A new bracket is cheaper than a headlight, but without it the headlight will not sit right.
  • The A/C condenser is the first in the radiator stack and is the easiest to puncture. Signs: oil stains or a dent on the fins.
  • Parking sensors and headlight washers: small parts that are often forgotten in the estimate.

How to judge impact depth from photos

The best evidence is not the bumper itself but the geometry around it. Look at the gaps between hood and fenders, and between fender and front door. If the door gap at the pillar has widened at the top or bottom, the force reached the structure. Then check body geometry (see Body geometry).

  • Hood bent in the middle: a wide and strong impact; the radiator support is almost certainly damaged.
  • Wheel pushed back or turned out: a wheel impact. Add control arms, knuckle and tie rod (see Suspension after an impact).
  • Airbags deployed: the SRS module, belts and often the dashboard go into the estimate (see Airbags and SRS).
  • A puddle under the car: punctured radiator or oil pan. The engine may have run without cooling.

Full-width or offset impact

A full-width impact spreads the force over both frame rails, so the structure often survives and the front-end stack takes the damage. An offset corner impact (left or right) concentrates the force on one rail, one wheel and one pillar. It often looks lighter because half of the bumper is intact, but the repair costs more because of geometry and suspension work. Left and right in damage descriptions are always counted from the driver's seat.

What to put in the estimate

For an impact up to the second layer, cover parts, reinforcement and paint are usually enough. From the third layer you add headlights, radiator support, radar and calibration. From the fifth, a frame bench and geometry measurement. Repair components and parts prices in Ukraine are covered in Repair scope and components and Parts prices in Ukraine.