BYD Seagull Headlamp Aim: Don't Adjust It Yourself

BYD Seagull headlamp aim: don't compensate for load by turning the adjusters

Scope: China-mainland 2026 Seagull; official website file 260317; PDF pp. 310 and 321, "Headlamp aiming"

Working isn't the same as aimed correctly

The manual lists bulbs or LEDs lighting normally, checking the levelling function and calibrating the dipped-beam downward angle as separate items, and says re-aiming may be needed if heavy loads are often carried. Seeing both headlamps light up confirms only part of the lighting status; it does not prove the beam direction and coverage suit the car's actual load. ^[1]

Explain the background when reporting a change

If night-time lighting seems different, tell the workshop whether a lamp has been replaced, the car has had a collision, it often carries heavy loads, or one side looks clearly different. Don't estimate the angle against a wall and turn the adjusters yourself to change the lamp position. The manual recommends aiming by an authorised service centre; not adjusting without a proper basis is this article's safety advice, and an inspection interval in the owner's manual cannot replace measuring equipment and a repair procedure. ^[1]

Think about the part and the sign-off together

When buying a headlamp, check the specific configuration and the manufacturer's fitment, and ask the repairer to explain the levelling and checks needed after fitting. This article gives no bulb wattage upgrades, beam angle values or general aiming steps. If a lighting problem reduces how far you can see or dazzles others, stop the related driving and let professionals deal with it. ^[1]

Sources

[Source 1] BYD China official website: 2026 Seagull Owner's Manual (in Chinese) (public PDF on the official website)
https://www.byd.com/material/domestic-official/user-manual/ocean/2026%E6%AC%BE%E6%B5%B7%E9%B8%A5%E7%94%A8%E6%88%B7%E6%89%8B%E5%86%8C260317.pdf
Verified: 2026-10-03; page publication date not confirmed.

This article contains information-organising suggestions from the editorial team; it is not a manufacturer repair procedure.