After extensive research, Dishonest John presents the top tips for dodgy service managers who prefer to put profits before punters.

All sorts of criteria need to be tested at an MOT, but if you know what to look out for you can do a few preliminary checks yourself and hopefully avoid the cost of a retest.

When you see ‘Service due’ on the dashboard, what do you do? Ignore it for 2,000 miles? Top up the oil? This basic guide should help you ensure everything goes smoothly.