That seems a good deal on the BMW given that it was below average mileage (it’s usually estimated at 10,000 miles a year) and it’s coming with a one year guarantee. Plus £600 for your Toyota is a decent trade-in price as some garages won’t part exchange cars that are more than 10 years old. If you were to look for a similar car at a BMW garage you’d be unlikely to find a better deal unless you were very lucky. If anything, you’d probably end up paying more as they would be unlikely to offer you the same for your Toyota.

There are a few things to look out for on these BMWs. Many suffer premature front suspension balljoint failure. Bushes in front suspension wishbones often need replacing after three to four years which means new wishbones. A spate of snapping rear coil springs on four- to five-year-olds is increasingly common. The 17-inch wheels are easily damaged on the inner rims. Clonks from the rear either mean a coil has snapped or the diff has torn away from its mounting. It can also mean the rear suspension subframe has torn loose from the floorpan at its mounting points. Make sure the electric engine radiator fan works. Even if it does, a previous failure could have resulted in head gasket failure so check for the usual signs of this such as emulsified oil under the oil filler cap. MOT failure due to brake pipe corrosion is not unknown. There have been general warnings about BMW automatic gearboxes as these are sealed units and the fluid is never changed even when serviced. However, problems, if they do occur, tend to be after 120,000 to 150,000 miles, so you shouldn’t have anything to worry about.