The Testers manual is used by all Vehicle Testing stations in order that a standard is maintained, it will give you a precise guide to the principles involved in testing each item and all the criteria to enable you to make your own pass or fail decisions. 

This section allows you to read the complete Mot Testers Guide. You will notice that the manual is in sections ie Brakes, steering, lighting etc.

You will find the method of inspection for each particular item and the possible reasons for rejection of that item, there is also information about exhaust emissions and the limits that apply for each age of vehicle. 

It is worth noting that not everything constituting a motor vehicle is a testable item. It is fair to say that if the testers manual does not specifically mention an item it is not possible for an mot station to test it and fail it. Remember you have the right to appeal against any decisions that you do not believe to be correct and all mot stations provide a form to enable you to do so.