Incorrect mirror use is consistently among the top reasons people fail their driving test. It's not that learners don't look — it's that they check the wrong mirror at the wrong time, or look too late. This guide explains the Mirror-Signal-Manoeuvre routine (MSM) and when to use each mirror.
1The MSM routine
Before any change of speed or direction, always follow this sequence:
1. Mirrors — check what's behind and to the sides. 2. Signal — if needed, to warn other road users. 3. Manoeuvre — carry out the action (turning, changing lane, slowing etc.).
This applies every single time you change direction, change speed, move off, stop, or change lanes. Making it a habit is what separates confident, safe drivers from those who get caught out.
The most common mirror fault on the driving test is failing to check mirrors when changing direction — particularly at roundabouts and when exiting junctions.
2Which mirror to check — and when
Interior (rear-view) mirror: • Before slowing or stopping. • Before accelerating. • Regularly while driving (every 5–8 seconds on open roads).
Left door mirror: • Before turning left. • Before moving to the left. • When stopping on the left. • During left turns to check clearance. • When passing cyclists or pedestrians close to the kerb.
Right door mirror: • Before turning right. • Before moving to the right. • When pulling out to pass a parked vehicle. • Before opening your door after parking.
💡 Tips
- •Your examiner expects you to make obvious checks — a glance that's too quick to notice is almost as bad as not looking at all.
- •After every signal, check the mirror to confirm it's safe to proceed.
3Blind spots
Blind spots are areas your mirrors cannot show you — typically just behind and to each side of the car. You must check blind spots by looking over your shoulder:
• Moving off from the side of the road: look over your right shoulder before pulling away. • Changing lanes: look over your shoulder in the direction you're moving before steering. • Cycling — be especially aware: cyclists can appear very quickly in your blind spot.
A blind spot check takes one second but could prevent a serious collision.
💡 Tips
- •Make your blind spot check obvious and deliberate — examiners look for this.
- •Modern cars have door mirrors angled to reduce blind spots, but never rely on them entirely.
4Common mirror mistakes on the driving test
These are the mirror faults examiners see most frequently:
• Not checking the interior mirror before slowing for a hazard. • Forgetting to check door mirrors before turning. • Not checking mirrors when leaving a roundabout (left mirror before exiting). • Missing blind spot checks when moving off. • Checking mirrors after signalling, rather than before. • Not adjusting mirrors before the test drive begins (this gives a bad first impression).
💡 Tips
- •Build a habit: every time you see a hazard, check the mirror before you react.
- •Before leaving the test centre, adjust all three mirrors and make this visible to your examiner.