If the dealer had advertised 21,000 and you subsequently found out it had done a total of 44,000, you'd have a case against the dealer for misrepresentation, rightly so - but in this case the correct total mileage has been advertised and unless you bought the car "unseen" you should have noticed the mileage difference then.

As I (and RT, and palco) have said, if it was not falsely advertised, and the actual mileage the vehicle has covered was given to you, then you really haven't got any case for complaint.

As for the front bumper : The gap would have been clearly visible to you from looking around the car - you noticed that pretty soon once you'd got home, so it was obviously apparent. If you failed to see it and comment on it at the time of purchase, then only you are to blame.

Want a brand new car, with no nicks, bumps, etc ? You have to buy a brand new car, and pay a premium for doing so. Probably most cars have been in a bump (however minor), and a lot of them the damage is so minimal as to be ignored.

Used cars are precisely that : used

It is suprising how many cars do get speedo changes. I doubt there is a single Megane Scenic out there with the odo matching what mileage the car has actually done for example.

I expect some part of the display failed under warranty and was replaced by Toyota.

As long as it has been properly documented and the correct mileage can be proven with no question I doubt it will have much effect on the long term value.

I can see why you might not be pleased but I can't see there are any real grounds to reject the car. You also have no grounds for comeback on anything cosmetic (or non cosmetic for that matter) which would have been reasonable to spot on inspection prior to purchase as long as you had opportunity to inspect.

Edited by pd on 04/04/2016 at 20:07

I had a speedo changed on a used motorcycle by the dealer that sold it and they gve me a signed letter detailing the mileage, date etc.

It would have been good practice for the car dealer to have done this.