Nothing has gone wrong mechanically, although the clutch will need doing soon at a relatively low 55000 miles.
The rear wheel arches are showing signs of corrosion.
Alloy wheels are corroded, a common problem I gather from reading other reviews on here.
The petrol Mazda 6 shares its engines with the Ford Mondeo; the 2.3 is just an enlarged version of the 2 litre found in both models, but I am happy that it does not share the rear subframe and poor rear brakes of the Mondeo.
The performance is OK, but I would expect a quicker 0-60 than 9 seconds from the alleged 164 bhp motor.
The Mazda has excellent handling for a car of this size, although I do find the power steering a bit light at higher speeds. And there is a lot of road noise.
The interior is a bit dark like most japanese motors, but I like the fact it has an electric sunroof and climate control, the Bose sound system with 6 in dash changer is very good also. I am not impressed with the fuel computer which only reads litres per 100 miles; what's wrong with mpg which we all understand.
Fuel consumption 25-27 urban 34-38 motorway, the car does seem to rev high at motorway speeds, but I understand the later versions have a 6 speed box, which will help quite a lot.
Overall I am very happy; it's just a shame about the minor corrosion issues.