2 min read

Checking the VIN and engine number against the car#

The registration plate is the least permanent thing about a car - plates transfer, cherished numbers come and go, and criminals simply screw on a copied set. The Vehicle Identification Number (VIN) is the car's real identity: a 17-character code stamped into the body at manufacture. If the VIN doesn't match the paperwork, nothing else about the car can be trusted.

Where to find the VIN#

Base of the windscreen (visible from outside, driver's side on most cars)
Driver's door pillar sticker or plate
Under the bonnet on the chassis/firewall stamping
Under carpet or seats on some models

All of them should agree - with each other, and with the V5C.

Why checks show only the last few characters#

Industry rules stop a consumer report derived from a registration lookup from displaying the full VIN - it would hand cloners the exact identity they need. Instead, reports show the last five characters, which is exactly enough for the buyer's job: stand at the car, read the real VIN, and confirm it ends the same way. A mismatch between the car's VIN and the report's ending is a serious red flag - the car is not what its plate says it is.

The engine number#

The engine number appears on the V5C and is stamped on the engine block. Engines do get legitimately replaced, so a mismatch isn't automatically sinister - but an undocumented mismatch on an otherwise "original" car is another question the seller needs a good answer for.

Cloning and ringing, briefly#

Cloning copies the identity (plates, sometimes documents) of a legitimate car onto a stolen or written-off one. The giveaway is the physical car disagreeing with the recorded identity: wrong VIN ending, wrong colour history, wrong spec for the model year.
Ringing transfers the identity of a scrapped or written-off car onto a stolen one. A car whose report shows Cat A/Cat B scrapping but which is sitting in front of you, drivable, is the textbook case - see scrapped vehicles explained.

DVLA's Vehicle Identity Check (VIC) scheme existed for exactly this risk (it ended in 2015; older cars can still show VIC test records on a report).

The two-minute buyer routine#

Read the VIN at the windscreen and door pillar - do they match each other?
Compare against the V5C's VIN, character by character.
Compare the ending against the history check's "VIN ends" figure.
Check the engine number on the V5C against the block if accessible.
Any mismatch: stop, and don't hand over money until it's explained in writing.

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The Check The Reg full report shows the VIN's last five characters and the recorded engine number in its Registered specification section, so you can run this exact routine at the car.