In most places you should have two exterior wing mirrors, and driving with only one is often illegal or considered unsafe. Check your local laws for the exact rule where you drive.
What the law typically says
Regulations vary by country and province/state. The most common requirement for passenger cars is two external mirrors (one on each side) alongside an interior rear-view mirror. Some jurisdictions may allow driving with only one exterior mirror if it provides adequate rear visibility, but this is increasingly rare for modern road vehicles. If a mirror is damaged or missing, many authorities treat the vehicle as not roadworthy until it is repaired.
Regional variations
United Kingdom and the European Union
In the UK and EU, passenger cars are generally expected to be fitted with two external rear-view mirrors in addition to the interior mirror. A missing or damaged wing mirror can be treated as a safety defect or a roadworthiness issue, potentially failing an MOT in the UK or triggering enforcement in others. Always replace a broken or missing mirror before continuing to drive.
United States
In the United States, rules vary by state. Most states require at least a rear-view mirror and at least one side mirror; many also require a second exterior mirror (on the driver’s or passenger’s side) for certain vehicle classes or when the original is damaged. To be sure, check the vehicle code or department of motor vehicles for your state.
Australia and New Zealand
Australia and New Zealand generally expect two exterior mirrors on passenger vehicles, with the exact requirements defined by national and state/territory regulations. If a mirror is missing or broken, the vehicle may be considered unsafe to drive until repaired, and you could be fined or face inspection issues.
Other regions
Outside these areas, requirements vary widely. If you regularly drive across borders or in a different country, verify the local rules before you drive with a single wing mirror.
Checklist: use this quick guide to determine the legality in your area before driving with only one wing mirror.
- Consult your country’s or state/province’s official transport or motor vehicle authority to confirm whether two exterior mirrors are required for your vehicle class.
- Check whether your vehicle is considered roadworthy with a missing or damaged mirror and what penalties or inspection consequences apply (for example, fines or MOT/inspection failures in some jurisdictions).
- If a mirror is missing or damaged, arrange an immediate repair or replacement before driving long distances or in heavy traffic.
Concluding: In practice, the safest and most compliant approach is to have two exterior mirrors in good condition and an interior mirror. If your area allows a single exterior mirror, ensure you are extra cautious and fix the missing mirror as soon as possible.
Safety considerations
Even where one mirror is legally permissible, having only a single wing mirror reduces your visibility to the side and rear. Blind spots increase the risk of lane-change collisions, and judging gaps when merging becomes harder. If you must drive with one mirror for a short period, drive cautiously and plan longer gaps and slower speeds where possible.
Safety-oriented tips to mitigate reduced visibility if you currently have only one mirror:
- Maximize your seating position to optimize the view out of the available mirror and through the side window.
- Rely more on the interior rear-view mirror, but supplement with frequent head checks before lane changes.
- Signal clearly and early when turning or changing lanes; avoid cutting in closely behind other vehicles.
- Increase following distance and reduce speed in traffic, especially in urban environments with many merging lanes.
- Avoid driving in heavy traffic, bad weather, or at night if possible until the mirror can be repaired.
Concluding: A single wing mirror is not a substitute for two mirrors. Prioritize repair or replacement as soon as feasible.
What to do if you must drive with one mirror for a short period
If you find yourself with only one functional wing mirror, here are practical steps to reduce risk while you arrange a repair:
- Limit driving to essential trips and avoid high-speed or highway driving if possible.
- Schedule a repair or replacement as soon as you can and avoid long journeys until it’s fixed.
- Before each trip, re-check the visibility through the remaining mirror and rely on additional shoulder checks when changing lanes.
Bottom line: Many regions require two exterior mirrors for passenger vehicles. If your mirror is missing or damaged, address it promptly to stay compliant and safer on the road.
Summary
Driveability with only one wing mirror depends on where you are. The prevailing expectation in many jurisdictions is two exterior mirrors plus an interior mirror, with missing mirrors often treated as a road safety defect. Always verify the precise requirements with your local transport authority, repair or replace a missing mirror promptly, and exercise heightened caution if you must drive with only one mirror for any period.
Is it illegal to have only one wing mirror?
The mirrors known as wing mirrors are illegal to be without one on the driver's side and either a central one or a passenger side one if no centre mirror/no rearward visibility (vans etc) UNLESS the vehicle is fitted with cameras to do the job formally carried out by the wing mirrors.
Can I drive my car with only one wing mirror?
However, naturally, your visibility — and therefore safety — will be reduced. It is advised, then, that you take it to get repaired as soon as you can. That said, if your wing mirror is missing entirely then it is an offence to drive and you should have it replaced immediately.
Can I legally drive with one side mirror?
California: If the vehicle is registered in this state then left side mirror is required and either a center mirror or right side mirror. If view from the center mirror is obstructed (this does not include passengers) then the vehicle must have a right side mirror.
Can I drive if my side mirror broke off?
Drive. If your near side rear view mirror that is the one on the passenger. Side is damaged or broken. Off you can still legally drive your car provided the other two mirrors are intact.