1. The price is unusually low
A cheap car can be genuine, but the further the asking price sits below comparable cars, the more explanation you should demand. Condition, short MOT, cosmetic damage, missing history or a quick sale can all affect price. The important thing is whether the reason is visible and believable.
Treat a bargain as a reason to verify more, not less. Confirm the vehicle exists, match the VIN and registration, check the seller and address, and avoid paying a deposit purely to stop somebody else “getting there first”.
2. The seller is creating pressure
Urgency is common in scams and poor deals because it stops buyers checking properly. Be cautious when the seller repeatedly says there are many other buyers, refuses basic questions, pushes for an immediate bank transfer or changes the agreed viewing arrangements at short notice.
A genuine seller can still be busy or keen to sell quickly, but the purchase should remain verifiable. You should have time to inspect the documents, view the car, test drive it and understand exactly who is selling it.
3. The advert, paperwork and seller story do not match
Small mistakes happen, but important facts should stay consistent. Compare registration, VIN, colour, mileage, keeper story, service history, model specification and asking price across the advert, V5C, history evidence and the physical car.
One typo is not automatically sinister. Several inconsistencies — particularly around identity, mileage or ownership — should keep the deal unresolved until they are properly explained.
4. The same MOT problems keep returning
An MOT fail or advisory does not automatically make a car bad. Patterns are more useful. Repeated tyre, brake, suspension or corrosion wording can suggest repairs were delayed, only partly addressed or that the car has a recurring condition issue.
Read the history chronologically and ask what changed after each test. For significant repairs, invoices and inspection evidence are stronger than a seller simply saying “that was all sorted”.
5. The mileage timeline does not make sense
MOT mileages should normally form a broadly rising timeline. A backwards reading can be a data-entry error or a legitimate instrument-cluster issue, but it still needs an evidence-based explanation.
Compare MOT dates, current advertised mileage and service invoices. If the true mileage cannot be established confidently, that uncertainty can affect value and future resale as well as your buying decision.
6. The physical condition contradicts the advert
Freshly cleaned cars can still hide problems. Look for paint mismatch, overspray, uneven panel gaps, tyre wear, warning lights, fluid leaks and interior wear that deserves explanation. None of these proves a hidden history on its own, but they help test whether the advert is accurate.
When possible, see the engine from cold and inspect the car in good light. If the seller controls the viewing so tightly that basic checks are impossible, consider why.
7. The test drive exposes faults or is refused
Listen and feel for clutch slip, harsh gearbox behaviour, steering pull, suspension knocks, brake judder, warning messages, overheating or weak acceleration. A test drive is not a professional inspection, but it can reveal problems that no online history check can see.
If you are not confident assessing the car, an independent physical inspection can be a sensible next step before committing to an expensive purchase.
8. Important paperwork is missing or vague
“Full service history” should be backed by something you can actually inspect: a paper record, invoices, digital records or other dated maintenance evidence. Check mileages and dates rather than counting stamps.
Also confirm the V5C details and seller story. A V5C is not proof of ownership by itself, so identity and payment still need sensible verification.
When should a red flag make you walk away?
A red flag is a prompt to investigate. A cluster of unresolved red flags is different. If identity, provenance or mileage cannot be established, the seller prevents verification, or the physical car exposes serious problems, another example is often the simpler and safer purchase.
The aim is not to make every used car look frightening. It is to separate normal used-car imperfections from risks that could cost you far more than the price of checking properly.
CarSussed approach: use the available evidence to decide what is confirmed, what is a negotiation point and what still needs physical verification before money changes hands.
Turn the evidence into a decision.
CarSussed brings the available history, MOT, mileage, provenance and valuation evidence together and turns it into buyer-focused actions.