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ECE R-145
ISOFIX Anchorage Systems and i-Size Seating Positions
Applies to
M
Topic
Occupant safety
Framework
UN ECE
Velocert services
European
Overview
UN Regulation No 145 lays down uniform provisions for the approval of vehicles with regard to ISOFIX anchorage systems, ISOFIX top tether anchorages and i-Size seating positions. Its annexes cover determining the 'H' point, ISOFIX anchorage systems and the i-Size seating position.
Current series: 01 series, Supplement 1 (in force 12 June 2025); this summary is based on the version published on EUR-Lex, the original version (2018). GlobalAutoRegs also lists Supplements 2 and 3 with no entry-into-force date. Checked on GlobalAutoRegs, 1 November 2026. For the current text, see the UN (UNECE) page.
Scope
It applies to vehicles of category M1 with regard to ISOFIX anchorage systems and top tether anchorages; other categories fitted with ISOFIX anchorages must also comply. It applies to vehicles of any category with regard to i-Size seating positions, if the manufacturer defines any.
The regulation applies to the following vehicle categories:
M
Passenger vehicles
Official source
For the requirements of this regulation, refer to the official text in force and its amendments.
Official UNECE text