| UN R13 Heavy-Duty Braking | Heavy-Duty Vehicle Braking | Uniform Provisions Concerning the Approval of Vehicles of Categories M, N and O with regard to Braking Heavy-Duty Braking Heavy-Duty Vehicle Braking UN Regulation No. 13 UN R13 | UNR | 13 | |
| UN R13-H Light Vehicle Braking | Light-Duty Vehicle Braking | Uniform Provisions Concerning the Approval of Passenger Cars with regard to Braking Light Vehicle Braking Light-Duty Vehicle Braking UN Regulation No. 13-H UN R13-H | UNR | 13 | |
| UN R79 Steering Equipment | Steering Equipment | Uniform Provisions Concerning the Approval of Vehicles with regard to Steering Equipment Steering Equipment Steering Equipment UN Regulation No. 79 UN R79 | UNR | 79 | |
| UN R89 Speed Limitation Devices | Speed Limitation Devices | Uniform Provisions Concerning the Approval of: I. Vehicles with regard to Limitation of their Maximum Speed II. Vehicles with regard to the Installation of a Speed Limitation Device (SLD) of an Approved Type III. Speed Limitation Devices (SLD) Speed Limitation Devices Speed Limitation Devices UN Regulation No. 89 UN R89 | UNR | 89 | |
| UN R90 Replacement Brake Components | Replacement Brake Linings, Discs, and Drums | Uniform provisions concerning the approval of replacement brake lining assemblies, drum brake linings and discs and drums for power-driven vehicles and their trailers <p>UNECE R90, covering key replacement components for brakes, is closely tied to UNECE R13/R13-H and R78 governing brake systems for commercial/passenger vehicles and motorcycles, respectively. The drum-brake lining provisions apply specifically to medium and heavy vehicles and trailers.</p> <p>While this rule addresses situations specific to replacement brake linings, these products may alternatively be approved through UNECE R13/13-H or R78. Consequently, products approved under the above rules do not require subsequent reapproval under UNECE R90 for use in vehicle maintenance.</p> <p>However, such brake components that have not been approved under UNECE R13 or R78 and which are intended for vehicles approved under those rules must comply with UNECE R90.</p> Replacement Brake Components Replacement Brake Linings, Discs, and Drums UN Regulation No. 90 UN R90 | UNR | 90 | |
| UN R139 Brake Assist Systems | Brake Assist Systems | Uniform provisions concerning the approval of passenger cars with regard to brake assist systems Project to separate brake assist systems provisions from UN R13-H and into a new UN Regulation. Brake Assist Systems Brake Assist Systems UN Regulation No. 139 UN R139 | UNR | 139 | |
| UN R140 ESC Systems | Electronic Stability Control Systems | Uniform provisions concerning the approval of passenger cars with regard to electronic stability control systems This regulation was established through the extraction of ESC provisions from UN Regulation 13-H. ESC Systems Electronic Stability Control Systems UN Regulation No. 140 UN R140 | UNR | 140 |