Side view mirrors are one of the key safety features of a car, but many drivers drive for years with improperly adjusted mirrors without even realizing it. According to research IIHS (Insurance Institute for Highway Safety), up to 30% accidents involving lane changes occur due to blind spots, which could be minimized by proper mirror adjustments. At the same time 9 out of 10 drivers adjust their mirrors so that part of the car body is visible in the reflection - this is a serious mistake, increasing the blind spot by 40%.
In this article you will not find template advice from the instruction manual, but practical recommendations, based on the physics of reflection, ergonomics and the experience of professional driving instructors. We'll look at how to adjust mirrors for different body types (sedan, hatchback, SUV), why standard adjustment is wrong, and how to check the result using a simple test. You will also find out what additional accessories (panoramic mirrors, cameras) really help, and some only create the illusion of safety.
Why standard mirror adjustment is dangerous
Most drivers adjust their side mirrors so that part of their car's rear wing is visible. This seems logical: "I have to see my car to understand its position." However, this setting creates critical blind spot the size of an entire car moving in the next lane.
The point is that viewing angle standard side mirror is approx. 15-18°, and when displaying a part of the body, you actually "cut" to 30% this angle. As a result:
- 🚗 Motorcycles and cyclists become invisible when driving in the adjacent lane
- 🚛 Trucks and buses “disappear” from view when overtaking on the highway
- 🔄 When changing lanes, you will not see a car coming from behind at an angle
20-40°
Research Society of Automotive Engineers (SAE) proved that correct adjustment of mirrors using the method "Blind zone" (Blind Zone) reduces the blind zone by 92% compared to the standard position. At the same time, the driver loses the opportunity to see his car in the mirrors - but this is the key to safety.
Preparing for adjustment: what needs to be done before adjustment
Before you begin making adjustments, complete a few required steps. It will take no more than 5 minutes, but guarantees an accurate result:
- Adjust the driver's seat to the correct position. Adjust the height, backrest angle and distance to the steering wheel so that your head is level
2/3windshield height. This ergonomic point, at which the viewing angles of the mirrors will be optimal. - Check the center mirror. It must be adjusted so that the rear window is completely visible. If your car has a function
automatic dimming(for example, in Toyota Camry or Volkswagen Passat), make sure it is disabled during setup. - Clean the mirrors. Dirt, water droplets or snow will distort the reflection and may cause incorrect adjustment. Use alcohol wipes — they don’t leave stains.
If your car has electric mirrors (adjustment button on the door), make sure the switch is in the position L (left mirror) or R (right). In some models (for example, Ford Focus or Hyundai Tucson) when the ignition is turned on, the mirrors automatically return to the “memorized” position - this must be taken into account.
☑️ Preparing to adjust the mirrors
Step-by-step instructions: Blind Zone method
This method was developed George Platzer (former president SAE) and is recommended by all leading driving schools in the world. Its essence is complete elimination of the blind spot due to the correct distribution of viewing angles between the central and side mirrors.
Step 1: Setting up the left mirror
- Sit in the driver's seat in a normal position (hands on the steering wheel in a
"9 and 3 o'clock"). - Tilt your head to the left until it touches the side window.
- Adjust the left mirror so that you can see minimal part of the rear wing (no more
2-3 cm).
Step 2: Adjusting the Right Mirror
- Return your head to the starting position.
- Tilt your head to the right so that it is above the center console (approximately where the gearshift lever is located).
- Adjust the right mirror so that you can see minimal body part (same as left).
Step 3. Checking the result
Return your head to normal position. Now in the side mirrors your car should not be visible. In this case:
- 👁️ B central mirror you can see the whole road behind you.
- 👉 B left side - the area on the left-back, which used to be blind.
- 👈 B right side - right-rear zone, including overtaking vehicles.
If, while driving on the highway, you see in the side mirror a car that has just overtaken you, and after a second it disappears from view, the setting is complete right. This means that the blind spot is minimal.
If after the adjustment you feel psychologically uncomfortable due to the lack of a view of your car, do a test: ask an assistant to walk around the car in a circle at a distance of 1.5-2 meters. You should see it in the mirrors all the way, without “failures”.
Adjustment features for different body types
The viewing angle and position of the mirrors depend on car design. What works for a sedan may be dangerous for an SUV. Let's look at the key differences:
| Body type | Adjustment features | Common mistakes |
|---|---|---|
| Sedan |
|
Too much downward tilt (“looks at the asphalt”) |
| Hatchback/station wagon |
|
Insufficient extension of the right mirror (cyclists are not visible) |
| SUV/SUV |
|
Angle too wide (too much sky visible) |
| Minivan |
|
Ignoring additional mirrors (risk of accidents when changing lanes) |
For pickups and cars with trailers separate rules apply. For example, when towing a trailer, the right mirror should be adjusted so that you can see trailer edge and the area behind it. In some countries (eg Germany) for towing trailers longer than 2.5 m are required mirror extensions.
How to adjust the mirrors when towing a trailer?
When towing a trailer, the right mirror must show at least 20% of the width of the trailer and the road behind it. If standard mirrors do not provide visibility, use extensions (for example, Thule Extend or Bosal Towing Mirrors). In some models (for example, Ford F-150) there is a "Trailer Tow" mode that automatically adjusts the angles of the mirrors.
Common mistakes and how to avoid them
Even experienced drivers make mistakes when adjusting their mirrors. Here are the most common ones and how to fix them:
⚠️ Attention: If, after adjusting using the “Blind Zone” method, you feel discomfort when parking (you can’t see the curb), do not return the mirrors to their previous position! Instead use a rear view camera or tilt the mirrors down only when parking (in some cars, e.g. Kia Sorento, there is a function "Parking Mode" for mirrors).
- 🔄 "All-round view" - when the driver tries to adjust the mirrors so that he can see
360°around the car. This is physically impossible and leads to perspective distortion. - 👓 "Adjustment for the passenger" — Adjustment of mirrors from the “passenger seat” position. Mirrors should only be adjusted from the driver's seat!
- 🌧️ "Ignoring the Weather" — in rain or snow, viewing angles change. In some vehicles (eg Audi Q7) there is a function
"Automatic folding mirrors", which can disrupt settings when activated. - 🚗 "Copying someone else's settings" — mirror angles depend on the driver’s height, car model and even head shape. What works for your friend may be dangerous for you.
Another common mistake is using fisheye (wide-angle mirror stickers). They distort the distance to objects, which is why the driver may incorrectly estimate the approaching speed of the car when changing lanes. If you need additional overview, it is better to install original wide angle mirrors (for example, for Toyota RAV4 or Nissan Qashqai).
Additional accessories: what really helps
The car accessories market offers dozens of gadgets to improve visibility, but most of them are either useless or dangerous. We tested popular solutions and compiled a rating based on the criterion "benefit to risk ratio":
| Accessory | Benefit | Risks | Recommendation |
|---|---|---|---|
| Wide Angle Mirrors (OEM) | Increase your view by 20-30° no distortion |
Can create a “dead zone” below the car | ✅ Suitable for SUVs and minivans |
| Fisheye stickers | Cheap solution to improve visibility | They greatly distort the distance (dangerous when parking) | ❌ Not recommended |
| Rear view camera | Helps when parking and reversing | Does not replace mirrors when moving forward | ✅ Mandatory for cars without parking sensors |
| All-round viewing system (360°) | Full control over the space around the car | High price, difficult to install | ✅ Optimal for large vehicles (e.g. Mercedes V-Class) |
| Blind Spot Sensors (BLIS) | Warns of vehicles in the blind spot | May trigger false alarms in parking lots | ✅ Useful for beginners and taxi drivers |
If you decide to install additional mirrors, choose models with a certificate ECE R46 (European safety standard). For example, mirrors HELLA ComfortLine or Bosch Universal Passed crash tests and does not create additional blind spots.
No accessory can replace the correct adjustment of standard mirrors. Additional devices (cameras, sensors) should be used as auxiliary, and not the main means of monitoring the situation.
How to check if the adjustment is correct: parking test
To make sure your mirrors are adjusted correctly, perform a simple test on a level parking lot:
- Park your car next to another vehicle (at a distance
1.5-2 m). - Turn on the hazard lights on your car.
- Drive your car in a circle, stopping at the following points:
- 📍 Rear bumper (must be visible in the center mirror)
- 📍 Left rear fender (should appear in the left mirror upon approach)
- 📍 Right rear fender (same as right mirror)
- 📍 Front bumper (must be visible in peripheral vision)
Another way to check is "test on the track":
- Drive on a multi-lane road at speed
60-70 km/h. - Ask the passenger to note the times when the overtaking vehicle:
- 👉 Appears in central mirror
- 👉 Goes to left side mirror
- 👉 Disappears from sight (must coincide with the moment when the car catches up with your car)
If there are “gaps” between these stages (for example, the car has disappeared from the central mirror, but has not yet appeared in the side mirror), then the blind spot is too large.
FAQ: answers to frequently asked questions
❓ Do you need to adjust the mirrors every time you change drivers?
Yes, if the difference in height of the drivers exceeds 10 cm. Even with a slight difference in height, viewing angles change. In cars with settings memory (for example, BMW 5 Series or Lexus ES) mirrors automatically adjust to the saved driver profile.
❓ Is it possible to adjust the mirrors while driving?
No! This is dangerous and prohibited Traffic regulations (clause 2.7). Even if you have an electric drive, being distracted by adjusting the mirrors increases the risk of an accident in 3.5 times (data NIIAT). Stop on the side of the road or in a parking lot.
❓ Why do mirrors fold in some cars when driving backwards?
This is a function "Auto Tilt Down", which automatically tilts the mirrors down when reverse gear is engaged (available, for example, in Mazda CX-5 or Subaru Outback). It helps you see the curb when parking, but after completing the maneuver, the mirrors should automatically return to the starting position. If this does not happen, check the settings in the menu Vehicle Settings.
❓ How to adjust mirrors if the car has dark tinted windows?
Tinting does not affect the adjustment of the mirrors, but may impair visibility at night. In this case:
- Use anti-glare mirrors (with automatic dimming).
- Adjust the angle of your mirrors so that they do not reflect the headlights of vehicles behind you.
- In some models (for example, Volvo XC60) there are modes
"Day/Night"for mirrors - use them.
❓ What to do if the mirrors constantly get knocked down (for example, after washing)?
If electric mirrors change position spontaneously, the reasons may be as follows:
- 🔋 Dead battery — when the voltage is low, the electronics resets the settings.
- 🔧 Motor malfunction - diagnostics required (error code can be checked via
OBD-II). - 💦 Water ingress into the mechanism (often happens after high pressure washing).
Workaround: Disable the feature "Auto Fold" (automatic folding) in the car settings.