
The method to adjust the headlights of a Excelle is as follows: There are two hex socket screws behind each headlight. Two of them face upward for adjusting the height, and the other two face inward for adjusting the left-right angle. Taking the 2021 Buick Excelle as an example, it is a compact car with body dimensions of 4609mm in length, 1798mm in width, 1486mm in height, and a wheelbase of 2640mm. The 2021 Buick Excelle features a MacPherson strut front suspension and a multi-link independent rear suspension. It is equipped with a 1.3T turbocharged engine, delivering a maximum horsepower of 163PS, a maximum torque of 230Nm, and a maximum power of 120kW, paired with a 6-speed automatic transmission.

My experience with adjusting the Excelle's headlights is to first locate the hood release handle inside the car, usually found under the steering wheel. Pull it to open the hood and secure it properly. Then, at the back of the headlight, you'll see a screw with a cross slot, typically used for adjusting the height—some cars also have screws for horizontal adjustment. I prepare a small Phillips screwdriver, insert it into the screw, and turn it counterclockwise to raise the beam or clockwise to lower it. This ensures the lights don't blind other drivers at night while still providing enough illumination to see the road clearly. It's best to adjust the lights in a garage or a dark area with the lights on, testing the beam position against a wall. The ideal height is when the center of the light spot at about 10 meters from the front of the car aligns with the height of the headlights. The first time I did this, I rushed and turned the screw too much, loosening it and causing the headlight to tilt. I had to re-secure it. I recommend turning the screw slowly and checking the adjustment multiple times—safety first to avoid accidents. After finishing, remember to close the hood and test the effect.

I believe adjusting headlights is crucial for safety, because misaligned beams on a Excelle could blind oncoming drivers at night and cause accidents. As a frequent driver, my method is: After opening the hood, locate the small adjustment screw near the headlight assembly inside the front bumper, then gently rotate it with a hand tool to alter the beam angle. Remember that vertical adjustment mainly prevents glare, while horizontal adjustment corrects the coverage range. I've tested this in a garage by turning on the low beams against a wall - the light pattern should align with a horizontal line. If set too high, it dazzles others; too low compromises your own visibility, which poses risks during long drives or in fog. Also, avoid excessive force to prevent damaging the screw mechanism - Buick parts can be troublesome to replace. For best results, perform adjustments on level ground when parked to ensure road safety without creating hazards.

The method I recommend is simple: open the hood, locate the adjustment screws near the headlights, and adjust the height direction with a regular screwdriver. After adjusting, drive the car to check the beam alignment.

I've adjusted the Excelle headlights myself a few times, and the key is using the right tools. The screws are located behind the headlight housing, somewhat hidden, just use a Phillips screwdriver to adjust the height. A common mistake is turning the screw too many times in haste, which can strip the threads - replacing it is troublesome, or causing uneven adjustment leading to scattered light. It's best to test adjustments in the dark against a wall, ensuring the beam's center points are symmetrical. If the car is old and the headlight bracket has aged, first check if the screws are tight, don't force it. The goal of adjustment is to keep the beam from exceeding the height of the front windshield, avoiding glare risks and ensuring stable driving visibility.

When adjusting the headlights on my Excelle, I noticed some vehicles allow beam adjustment via in-car settings. However, manual adjustment is most reliable: open the hood, locate the screw position behind the headlight, and use a screwdriver to rotate for height/direction adjustment – for instance, to make the beam more concentrated at night without scattering. Before adjusting, park on level ground with headlights on to test the current position; aim for a clear horizontal light spot on a wall 10 meters away. For safety, avoid setting them too high to prevent blinding oncoming traffic, and ensure your own visibility to prevent accidents.


