The professionals at http://www.pmwltd.co.uk agree that the exhaust is one of the most important things to inspect before showing up for the regular MOT test. Make sure that the exhaust is not jiggling around. It should be properly mounted. It should not leak anything, not to mention about the so called sports exhausts. In other words, if it makes too much noise, you are very likely to end up with an expensive bill and a failed test. A few other common considerations to look for include tyres, light bulbs, windscreen wipers, windscreen, number plates, brake pads, rubber brake hoses or drive shaft boots.