There is a simple answer to ‘How often should you check your mirrors on a driving test?’ – It’s that you should check them in just the same way that you have been doing during your driving lessons! But let’s go into a bit more detail.
How often should you check your mirrors on a driving test?
There is no hard and fast rule to the frequency of mirror checks. Although on average, around every 5 to 8 seconds is often recommended. It depends on what is happening around you at the time, how busy the road is, and what you are intending to do.
Regular mirror checks are always important. You need to be aware of what is around your car in case you need to take any action that may affect other road users. Sometimes other vehicles can disappear into blind spots. Regular mirror checks will ensure that you are still aware of them. A safe driver is always aware of where other people are, before they decide to do anything such as changing speed or position.
Your driving examiner will be watching you throughout your test, to make sure that you are using your mirrors regularly. But remember, it’s not just about looking in the mirrors, it’s about acting safely and sensibly on what you see. It doesn’t matter how many times you check a mirror, if you then change lanes unsafely. If someone has to take action to avoid you then your use of mirrors is not what it should be!
Which mirror should I use?
Generally, your interior mirror should be the one you use the most, particularly before changing speed. That way you will be aware of how close other drivers and riders are. You need to know whether what you are about to do will have any effect on them. You may for instance, need to slow down earlier if there is someone fairly close behind you. Regular use of the exterior door mirrors is also very important. You should use these in addition to the interior mirror, particularly before making a change of direction.

Checking blind spots
There may be occasions when you may need to take a quick glance to the side to cover any blind spots. Your mirrors don’t cover everything around the car. However, don’t make the mistake of twisting around to look behind the car, especially when you’re driving at speed. You may lose control of your steering if you do this, and you may not react in time to what is happening ahead.
Timing is also important when checking your mirrors. If you need to make a lane change, there is no point in leaving it to the last second before looking to see what may be behind or alongside you. You may not have enough time to react if you do this. Remember that you need to use your mirrors ‘well before’ you take any action.
Using mirrors on a driving test
Many people will fail a driving test because of not making ‘effective’ use of the mirrors. Your examiner will want to see regular use of them (but don’t try to overdo it!) In addition however, they will also want to see you using the correct mirror(s); and also that you demonstrate sound judgement. You must show an awareness of where other road users are, and ensure that whatever you do does not cause problems or safety concerns for others. And no… you do NOT need to exaggerate your head movement to convince the examiner that you are using your mirrors. Just use them normally, the way you have been taught!