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UN R39: Proposal for amendments
Document GRSG-127-12/Rev.1
11 April 2024

Proposal from the task force on UN R39 Mileage Accuracy to amend and supplement the existing requirements for odometers to include provision on:

  • accuracy of the on-board odometer mileage values,
  • anti-tampering of the on-board odometer mileage values,
  • accuracy and anti-tampering of the odometer mileage values displayed to the driver.

Status: Informal GR review
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Previous Documents, Discussions, and Outcomes
7. | UN Regulation No. 39 (Speedometer and Odometer)

23. The expert from the Netherlands, introduced the status report (GRSG-127-35) of the TF on UN Regulation No. 39 on Mile Age Values. He explained that TF had held three hybrid meetings and had collected information on relevant existing technologies, mileage fraud data and research, pre-existing standards and legislation. He added that the TF was ready to introduce a preliminary proposal of amendments to the UN Regulation (GRSG-127-12-Rev.1) and that the TF would work on finalising the proposal in order to prepare an official document for the October session of GRSG. The expert from the United Kingdom stated that the proposed tolerance of +/- 5 per cent was excessive and requested +/- 2.5 per cent. The expert from EC supported this last value. The expert from the Netherlands explained that +/- 2.5 per cent could be achieved in type approval by using new tyres as original equipment. The expert from OICA added that the tolerance of +/- 5 per cent stemmed from tires and the speedometer, and explained that manufacturers were not responsible for the accuracy since it depends on tires and wheel rims. She also argued that vehicle owners themselves sought to tamper with unlimited time and access to the vehicle and that its prevention would be very difficult by simply introducing technical requirements on the odometer. Moreover she added, the introduction of the proposed requirements would result in additional costs for consumers and fraud would continue. She stated that data were awaited on accuracy and related safety issues. Finally, she proposed the consideration of a proven viable solution to the problem of odometer tampering that had been adopted by countries, as presented to GRSG in the past, rather than introducing technical requirements to the UN Regulation. GRSG also noted GRSG-127-06, tabled by the experts from the Netherlands and the United Kingdom that received the support of the experts from Spain. The expert from IMMA requested to delete the first sentence of GRSG-127-06.

24. GRSG agreed to resume discussion on this subject based on a new proposal submitted by TF, incorporating the comments and GRSG-127-06.

Relates to UN R39 |