German study: one in three cars has headlight faults
Headlight alignment faults found in 27.8% of cars
German study: one in three cars has headlight faults
ZDK and DVW tests show 27.8% of cars and 32.1% of commercial vehicles have lighting defects, with misaligned headlights most common. See why setup matters.
2025-12-04T11:23:30+03:00
2025-12-04T11:23:30+03:00
2025-12-04T11:23:30+03:00
According to the latest annual testing conducted jointly by the Central Association of the German Automotive Industry (ZDK) and the German Transport Service (DVW), roughly one in three passenger cars—27.8%—has faults in the lighting system.The most widespread issue is incorrect headlight alignment, which either fails to illuminate the road effectively or dazzles oncoming drivers. A seemingly minor deviation behind the lens turns into a major problem out on the road, where visibility and glare are two sides of the same safety coin.The picture looks even bleaker for commercial vehicles: 32.1% exhibit lighting defects. The figures leave little doubt that proper headlight setup belongs near the top of any maintenance checklist, because the payoff—clearer vision for one driver and less glare for another—is immediate.
headlight alignment, lighting system defects, misaligned headlights, German study, ZDK, DVW, vehicle safety, commercial vehicles, passenger cars, glare, maintenance checklist
ZDK and DVW tests show 27.8% of cars and 32.1% of commercial vehicles have lighting defects, with misaligned headlights most common. See why setup matters.
According to the latest annual testing conducted jointly by the Central Association of the German Automotive Industry (ZDK) and the German Transport Service (DVW), roughly one in three passenger cars—27.8%—has faults in the lighting system.
The most widespread issue is incorrect headlight alignment, which either fails to illuminate the road effectively or dazzles oncoming drivers. A seemingly minor deviation behind the lens turns into a major problem out on the road, where visibility and glare are two sides of the same safety coin.
The picture looks even bleaker for commercial vehicles: 32.1% exhibit lighting defects. The figures leave little doubt that proper headlight setup belongs near the top of any maintenance checklist, because the payoff—clearer vision for one driver and less glare for another—is immediate.
