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Daytime running lights (DRL) — retrofitting without registration

Verified 23 June 2026 · RoadLegal.cz editorial team

Under current regulations, cars and buses can be retrofitted with daytime running lights (DRL). For retrofitting, you must use lamps homologated as a daytime running light — marked (D)RL above the country's homologation mark per UNECE Regulation No. 87.

Placement requirements (UNECE Regulation No. 48)

  • Count — two lamps at the front of the vehicle
  • Width — inner edges of the lamps at least 600 mm apart
  • Height — from 250 mm to 1500 mm above the road surface

Wiring requirements

The wiring of daytime running lights must ensure that they:

  • light up independently, without the position lights,
  • turn on automatically when the engine starts and turn off when it stops,
  • turn off when the headlamps are switched on (main beam, dipped beam, or fog lights).

Assessing correct placement and wiring per UNECE Regulation No. 48 is a specialist matter that can't be reliably judged by eye alone. Given how demanding the requirements are, we recommend leaving installation to a specialist shop — for example, an authorized dealer workshop or a shop specializing in vehicle electrics.

Legal basis
  • UNECE Regulation No. 87 (DRL homologation — (D)RL mark)
  • UNECE Regulation No. 48 (installation and wiring of lamps)
Required paperwork
  • (D)RL homologation mark on the lamp per UNECE Regulation No. 87
Inspection/verification
STK / specialist shop performing the installation