I suspect it’s an inadvertent error such as a mechanic doing some work and then forgetting to take the exact mileage but remembering an approximate figure. Has 15k got a significance in Toyota servicing, could it just be a description of the 15k service, not the recorded miles. It’s speculation of course but certainly way too late to go back to the dealer.

Its an issue for sale and you could stay quiet and rely on a private buyer not picking it up. As long as you don’t actively lie the buyer has limited rights. Personally I wouldn’t want to deceive any buyer by keeping quiet on sale day nor have the nagging worry that they might come back in future on the issue. I would give them the known facts.

If trading it in it’s easier as the trader will make their own enquiries and draw their own conclusions.

in any advert, or verbally, keep to the facts. Let the buyer draw their own conclusions.

It is a lazy person entering an approx mileage to get a valuation or HPI check.

What people don't realise is that the HPI record actually uses mileages entered by people doing a check. So, if you punt your car around to get a px for example and the first dealer does a check on it and enters 16788 it records that. If the next one can't be bothered to go and look at an odo and just someone just says "it's done 16k" they might enter 16000 as the mileage. Both are liable to be recorded on the record.

These things have to be taken with a huge pinch of salt and use common sense rather than random numbers on a computer record.

I am sure this is what has happened here and I am sure your car is quite genuine and not been clocked. Just because some random commercial database with no official status has a random reading means little.

This is probably the NMR. The NMR is useful but the "National Mileage Register" has about as much status as the "National Accident Helpline". It is just a database run for profit.

Edited by pd on 28/05/2023 at 12:42