Adjusting Nissan Sunny headlights: step-by-step guide with expert tips

Nissan Sunny is a legendary car that still remains popular due to its reliability and ease of maintenance. However, even with such a proven model, over time, the headlight settings get lost: one headlight shines higher than the other, the low beam blinds oncoming drivers, or the road is not well lit. If you notice that the light beam went up, down or to the side, don’t rush to go to the service station - you can adjust the headlights yourself in 20-30 minutes.

In this article you will find step-by-step instructions with photos, detailed adjustment diagrams for models B13, B14 And B15, as well as tips on how to avoid common mistakes. We'll look at what tools you'll need, how to prepare the car, and what to do if the adjusting screws become sour or won't turn. And at the end - answers to frequently asked questions and life hacks from auto electricians.

Why does the headlight adjustment on a Nissan Sunny go wrong?

Even if you operate your car carefully, over time the headlight settings may become unbalanced. Here are the main reasons:

• 🚗 Replacing lamps or headlights. New lamps (especially halogen or LED) may have a different center of light output, which requires adjustment.
• 💥 Shock or vibration. Driving on bad roads, even small accidents or hitting a curb often disturbs the position of the reflector inside the headlight.
• 🔧 Replacing springs or shock absorbers. Changing the vehicle's ground clearance automatically changes the headlight angle.
• ⚙️ Wear of adjusting mechanisms. Over time, the plastic screw gears wear out and the headlight “sags.”
• 🌡️ Temperature difference. In winter, the plastic of the headlight housing can become deformed, which affects the direction of the light.

If you have recently installed fog lights (PTF) or replaced the standard headlights with LED analogues, adjustment is required! LED lights often have a different focus and, without adjustment, will blind oncoming drivers.

⚠️ Attention: On Nissan Sunny B15 (2000-2006) there is often a problem with “fatigue” of the metal of the headlight mounts. If, after adjustment, the light goes out again after a week, check the play of the fasteners and, if necessary, strengthen them with additional washers.

Preparing for adjustment: tools and conditions

Before you start setting up, you need to properly prepare the car and workplace. Here's what you'll need:

Tool/material	Purpose	Note
Phillips screwdriver (PH2)	For adjusting screws	Some models may require Torx T20
Tape measure or ruler	Markings on the wall	Minimum length - 2 meters
Masking tape	Fixing the markings	Don't use regular tape - it leaves marks.
Level (bubble or laser)	Checking body levelness	You can use the level app on your smartphone
WD-40 or similar lubricant	If the screws are soured	Apply 10-15 minutes before adjustment

It is also important to choose the correct location for adjustment:

• 📏 Level ground no slope (check with a level!).
• 🧱 Wall or gate at a distance 5-7 meters from the car.
• 🌓 Twilight or night time - this way the light beam is better visible.
• 🚫 Lack of lighting from the side (lights, headlights of other cars).

⚠️ Attention: If you adjust the headlights to Nissan Sunny with gas shock absorbers, pre-pump the suspension - press firmly on each corner of the body several times to stabilize the ground clearance.

Nissan Sunny headlight adjustment diagram: step-by-step algorithm

On all generations Sunny (B13, B14, B15) the adjustment process is almost identical. The only difference is the location of the adjustment screws. Here is a universal algorithm:

Fill a full tank of fuel|Check the tire pressure (2.0-2.2 bar)|Place the car perpendicular to the wall (distance 5 m)|Load the car (driver + 1 passenger or 70 kg in the trunk)|Clean the headlights from dirt and dust-->

Step 1. Marking on the wall

Using a tape measure and masking tape, apply the following markings to the wall (see diagram below):

• 📍 Vertical lines - in the center of each headlight (the distance between them = the distance between the centers of the headlights on the car).
• 📍 Horizontal line — at the level of the center of the headlights (measured from the ground to the middle of the headlight glass).
• 📍 Additional horizontal line - on 5-7 cm below main (for low beam).

Step 2: Adjusting the Vertical Angle (Light Height)

On the back of the headlight, find upper adjustment screw (usually it is located closer to the radiator). Rotate it with a screwdriver:

• ⬆️ Clockwise — the light rises.
• ⬇️ Counterclockwise — the light goes down.

The border of the light spot must touch bottom horizontal line (see diagram). For Nissan Sunny B15 with halogen headlights, a slight excess (up to 1 cm) is allowed for better illumination of the roadside.

Step 3: Adjusting the Horizontal Angle (Light Direction)

The side screw (located closer to the wing) is responsible for shifting the light beam left and right. Adjust it so that break in the cut-off line (the corner of the “tick”) was at 1-2 cm to the left vertical line of the center of the headlight. This will prevent oncoming drivers from being dazzled.

Features of adjustment for different generations of Sunny

Although the setup principle is the same, there are nuances for each generation:

Nissan Sunny B13 (1986-1990)

On this model, the adjustment screws are often sour due to lack of protection from moisture. Be sure to treat them before adjusting WD-40 and let stand for 10-15 minutes. Also on B13 headlights meet plastic gears in the adjustment mechanism - they are easy to break, so turn the screws smoothly, without effort.

Nissan Sunny B14 (1990-1995)

Here the adjustment is simplified - the screws are located in more accessible places. However, on machines with electric headlight corrector (optional for European markets) Before manual adjustment, you must turn off the corrector (switch on the dashboard to position “0”).

Nissan Sunny B15 (1995-2006)

On B15 with rear drum brakes the adjustment often goes wrong due to rear suspension sagging. Before adjusting the headlights, check the condition of the springs and shock absorbers. Also on this model the adjustment screws can be hidden plastic plugs - they need to be carefully pryed off with a screwdriver.

How to check the operation of the electric headlight corrector?

If your Sunny B14/B15 equipped with an electrical corrector, turn on the ignition and turn the switch on the dashboard. In this case, clicks of the servos in the headlights should be heard. If there is no sound, check the fuse F10 (10A) in the block under the steering wheel or relay R7.

Common mistakes and how to avoid them

Even experienced car owners sometimes make adjustment mistakes. Here are the most common:

• ❌ Adjustment on uneven ground → the light will be directed crookedly, even if everything according to the markings is correct.
• ❌ Ignoring vehicle load → if adjusted with an empty trunk, the headlights will shine into the sky when loading.
• ❌ Using faulty lamps → a burnt out or cloudy lamp distorts the light beam.
• ❌ Adjustment of only one headlight → the difference in the light of the right and left blocks tires the eyes and impairs visibility.
• ❌ Tightening the screws too hard → the thread may be stripped or the plastic mechanism may be broken.

Critical error: adjusting headlights with broken glass or cracked reflectors. In this case, the light is scattered chaotically, and no adjustment will give the correct result - the headlight needs to be replaced or restored (polished, sealed).

Adjusting fog lights (FTL) on Nissan Sunny

Fog lights on Sunny regulated separately from the main ones. Their job is to light the way below fog level, so the light beam must be wide and flat.

Instructions:

1. Place the car at a distance 5 meters from the wall.
2. Apply markings: horizontal line on 10-12 cm below PTF center.
3. Turn on the fog lights (no low beams!).
4. Adjust the screws so that the upper limit of the light spot coincides with the line and the beam is symmetrical.

On Nissan Sunny B14/B15 PTFs are often installed in the bumper. Access to the adjustment screws may require Removing the protective cover (2-3 screws are unscrewed from the bottom of the bumper).

⚠️ Attention: If after adjusting the PTF lights shine too high, check whether they are installed high power lamps (For example, H11 100W instead of regular ones 55W). This not only blinds oncoming drivers, but also melts the plastic of the headlights!

What to do if the adjustment screws do not turn

Soured or rusted screws are a common problem on old Sunny. Here's how to deal with it:

1. Treatment with WD-40:

   Pour liquid into the screw mounting area and wait 10-15 minutes. Try gently turning the screw back and forth.

2. Heating:

   If the screw does not budge, heat it with a hair dryer (do not overheat the plastic of the headlight!). After heating, try cranking it.

3. Disassembling the headlight:

   If the screw breaks, you will have to remove the headlight and replace the adjusting mechanism. On Sunny B13/B14 this can be done without removing the bumper.

4. Alternative method:

   If the screw turns but does not lock, fix it temporarily nut with locknut or epoxy resin.

On Nissan Sunny B15 with plastic gears in the adjustment mechanism sometimes helps changing the lubricant. Disassemble the headlight, clean the gears from old grease and apply new one (for example, Litol-24).

FAQ: Frequently asked questions about adjusting Nissan Sunny headlights

Is it possible to adjust the headlights without markings on the wall?

Yes, but it's less accurate. Alternative method:

1. Park your car on a level area opposite a dark wall.
2. Turn on the low beam and mark the edge of the light spot with chalk.
3. Drive back 5 meters - the light should go down to 5-7 cm below the mark.

This method is suitable for rough adjustments, but for fine adjustments it is better to use markings.

How often should headlights be adjusted?

Recommended frequency:

• After replacing lamps or headlights.
• After replacing springs/shock absorbers.
• Once a year (spring or autumn).
• After strong impacts (for example, hitting a curb).

What to do if after adjusting the headlights the light is dim?

Possible reasons:

• The headlights are foggy (the sealant needs to be dried or replaced).
• The lamp is close to failure (check the voltage at the contacts).
• The contacts in the headlight unit have oxidized (clean with sandpaper).
• Problems with the generator (check the voltage at the battery terminals with the engine running - there should be 13.8-14.5 V).

Can headlights with LED bulbs be adjusted?

Yes, but with reservations:

• LED lamps have a different focus, so after installation adjustment is required.
• Some LED lamps (for example, those with a fan) may not fit into the standard headlight housing Sunny - check before purchasing.
• After replacing with LED it may be necessary additional adjustment of the corrector (if there is one).

On Nissan Sunny B15 with LED lamps it is often necessary disable automatic corrector, since it does not work correctly with LEDs.

Where are the headlight fuses on a Nissan Sunny?

The location of the fuses depends on the generation:

• B13/B14: fuse box under the steering wheel, F9 (10A) - low beam, F10 (10A) — high beam.
• B15: fuse box in the engine compartment (next to the battery), F30 (15A) - low beam, F31 (10A) — high beam.

If the headlight does not work after replacing the fuse, check light relay (on B15 this is a relay R7).