Chassis leg damage: repairable or scrap?
Structural damage caps a deal grade outright in our scoring model. What chassis leg damage means, and when a bent shell is still worth bidding on.
REPAIR · 4 min read
What counts as chassis leg damage
The chassis legs are the structural rails that run under the engine bay and boot floor, the part of the shell that everything else bolts to. A hit hard enough to bend or crease one is a structural repair, not a cosmetic one, which is why our own repair model treats it as its own category, separate from panels, separate from mechanical, priced on its own tier.
Where the frame tier comes from, and why it is not a guess
Our Analyzer never invents a structural rating from a dent it happens to see. It reads the title status instead: a clean or unrecorded title carries zero frame damage in the model regardless of what the photos show, because a car that title-checked as non-structural was not classed as structural by the insurer. A Cat S, Cat A or Cat B title, or an explicit structural or non-repairable marking, is what actually sets the frame tier, at Minor pull, Moderate or Severe, priced from roughly £1,500 for a minor pull up to around £8,000 for a severe structural repair in the UK model. A full-height roof hit or the most severe damage tag also adds to this tier directly, on top of whatever the title implies.
The one damage type that caps your grade outright
Every other kind of damage on a lot just changes the repair bill. Severe structural damage is different: our own grading logic caps the deal grade at a C no matter how good the profit and ROI numbers look underneath it. That is a deliberate rule, not a bug, severe frame damage carries a repair-quality and resale-trust risk that a spreadsheet cannot fully price in, so the grade reflects that even when the raw numbers say A.
Repairable vs scrap, in practice
A minor pull, a shell that measures straight after a jig pull with no creasing at the rails themselves, is a normal structural repair that a competent bodyshop handles routinely and that a Cat S buyer market accepts. Severe structural damage, a genuinely creased or torn chassis rail, telescoped rails, or damage that reaches the firewall or scuttle, is a different proposition: the repair cost climbs fast, a buyer for the rebuilt car gets harder to find because private insurers and some buyers baulk at heavy structural history, and the margin for error on the repair itself shrinks. Treat severe structural as scrap-for-parts territory unless you already have a confirmed buyer and a bodyshop that will stand behind the work.
What to check before you trust the tag
Check the shut lines around the doors, bonnet and boot in the photos, uneven gaps mean the shell has moved. Look at the inner wings, slam panel and boot floor for creasing or fresh weld marks, not just the outer panel. Cross-reference the damage tag against the title status: a heavy front-end tag on a clean title usually means the impact stayed in the crumple zone and missed the rails, while the same tag on a Cat S title means it likely did not. Paste the lot into the Analyzer to get the frame tier priced from the title and photos together rather than eyeballing it.