What is the reason for the standard reference values of car headlight height adjustment?
2 Answers
H1 height up to 62.5 mm, H3 not exceeding 42 mm, H4 not exceeding 92 mm, etc. More details are as follows: No adjustment needed: Vehicle lighting regulations usually apply to the left and right of the low beam, while the high beam generally does not require adjustment. The adjustment can be made via the knob at the rear of the headlight assembly, allowing owners to adjust the lights themselves with tools. Self-adjustment of headlights is not allowed: Generally, self-adjustment of headlights is not permitted. According to relevant automotive safety standards, headlights are adjusted to the optimal irradiation range and height before leaving the factory. It is generally recommended to have professionals or use professional equipment for adjustments. Individuals should not attempt adjustments lightly, as this may lead to unforeseen consequences, ultimately requiring the vehicle to be sent back to a 4S shop for repairs.
The standard reference values for adjusting vehicle headlight height are primarily designed to ensure driving safety, preventing lights from being too high and blinding oncoming drivers or too low to illuminate the road properly. As a long-haul truck driver, my vehicle often carries varying loads, which changes the front height, so adjustments must follow the manufacturer's standard values. These are usually marked on the trunk lid or in the manual, such as 70-85 cm above the ground. Failing to adhere to these standards can lead to accidents and may result in traffic police fines—I've seen drivers penalized for improper light adjustments. During annual maintenance, I also check the headlight angles to avoid misalignment affecting nighttime visibility. Safety comes first; no one wants to cause trouble on the road.
