Buying a used car without running checks is like buying a house without a survey. A full car check brings together data from multiple official and private sources to give you a comprehensive picture of a vehicle’s history, legal status and mechanical reliability. Some of this information is available for free; other parts require a paid service. This guide explains what each check covers, where the data comes from, and which checks are essential.
The Key Components of a Full Car Check
A thorough vehicle check covers several distinct areas. Here is what each one tells you and why it matters:
1. MOT History
The MOT history is the single most revealing dataset available for free. It shows every annual test result since the vehicle was first tested, including:
- Pass or fail result for each year
- All defects categorised as dangerous, major, minor or advisory
- Recorded odometer reading at each test
- The test station name and location
- Current MOT expiry date
By reviewing MOT history, you can spot recurring faults, identify potential clocking (via mileage inconsistencies), and gauge how well the car has been maintained over time. This data comes from the DVSA and is the same source used by the official GOV.UK MOT checker.
2. Mileage Verification
Odometer clocking — winding back the mileage display — is estimated to affect over 2 million vehicles in the UK. The MOT mileage trail provides a year-by-year record that should show steady, consistent increases. A drop in mileage between tests, unusual plateaus, or large unexplained jumps are all warning signs. Our free checker flags these automatically.
3. Vehicle Tax Status
The DVLA vehicle enquiry service confirms whether the car is currently taxed, when the tax expires, and whether the vehicle is declared SORN (Statutory Off Road Notification). Since 2014, tax does not transfer when a car is sold, so you will need to tax any vehicle you purchase before driving it away.
4. Outstanding Finance
Around one in three used cars sold in the UK has outstanding finance, according to industry estimates. If you buy a car with unpaid finance, the finance company can legally repossess it — even if you paid the seller in full and had no idea about the debt. Finance checks are not available for free; they require a paid HPI-style check from providers such as HPI, RAC, AA or Experian AutoCheck.
Important: Outstanding finance is one of the biggest financial risks when buying privately. A paid finance check typically costs £10–£20 and is strongly recommended for any vehicle over £3,000 in value.
5. Stolen Vehicle Check
A stolen vehicle check queries the Police National Computer (PNC) to see whether the car has been reported stolen. If a car you purchase turns out to be stolen, the police will seize it and you will lose both the car and the money you paid. Like finance checks, stolen checks are only available through paid services.
6. Insurance Write-Off History
If a vehicle has been declared a write-off by an insurance company, this is recorded on the MIAFTR (Motor Insurers Anti-Fraud and Theft Register) database. Write-off categories are:
| Category | Meaning | Can it return to the road? |
|---|---|---|
| A | Scrap only — must be crushed | No |
| B | Body shell must be crushed, but parts can be salvaged | No |
| S (formerly C) | Structurally damaged but repairable | Yes, after repair |
| N (formerly D) | Non-structural damage, repairable | Yes, after repair |
A Category S or N write-off can legally be repaired and returned to the road, but it should always be disclosed at sale. These vehicles are worth significantly less than non-written-off equivalents, even after professional repair. Always check whether the repair was carried out to a proper standard.
7. Number Plate Changes
Plate changes can be legitimate (personalised registrations) or can be used to disguise a vehicle’s identity. A paid check will show any previous registrations the car has been assigned, helping you confirm the vehicle’s identity matches across all records.
8. Recall Information
Manufacturers issue safety recalls when a batch defect is found. Recalls are repaired for free at any authorised franchised dealer. Our free checker cross-references your vehicle against known UK recalls and alerts you to any that may apply based on make, model and year.
Free vs Paid Checks: What’s the Difference?
| Check | Free? | Source |
|---|---|---|
| MOT history & defects | Yes | DVSA |
| Mileage verification | Yes | DVSA (MOT records) |
| Vehicle tax status | Yes | DVLA |
| Vehicle details (make, model, colour, engine) | Yes | DVLA |
| Recall alerts | Yes | Manufacturer data |
| Outstanding finance | No | Finance companies via HPI etc. |
| Stolen vehicle flag | No | Police National Computer |
| Insurance write-off | No | MIAFTR database |
| Plate change history | No | DVLA (via paid providers) |
When Should You Run a Full Check?
Run a free check on every vehicle you are seriously considering. If the MOT history and mileage look clean and you are ready to proceed, run a paid check before exchanging money — especially on higher-value vehicles or private sales where there is no dealer warranty safety net.
The cost of a paid check (£10–£30) is trivial compared to the potential loss of thousands of pounds on a car with hidden finance, stolen history or undisclosed write-off damage.
Start with a free full car check
Enter a registration to view MOT history, mileage, tax status, reliability score and recall alerts — completely free and with no sign-up required.
Run a free car checkFrequently Asked Questions
What does a full car check include?
A full car check typically covers MOT history, mileage verification, tax status, outstanding finance, stolen vehicle markers, insurance write-off records, plate changes, recall information, and key vehicle details such as make, model, colour and engine size.
Can I do a full car check for free?
You can get a substantial amount of information for free — MOT history, mileage records, tax status, vehicle details and recall alerts. For finance, stolen and write-off checks, you will need a paid provider.
Should I do a car check before buying a used car?
Absolutely. A vehicle check can reveal hidden problems such as outstanding finance, clocked mileage, major MOT defects, write-off history or recall notices that a seller may not disclose.
What is the difference between a free check and a paid HPI check?
Free checks use publicly available DVSA and DVLA data. Paid HPI-style checks also access private databases covering finance, stolen vehicles, insurance write-offs and plate changes.