UN R41 (2012)
14 Aug 2012 2012-08-17 06:59:37 UTC 03 series of amendments 03 series of amendments | Supplement 1 Corrigendum 1 to Revision 1 04 series of amendments Based upon the adopted proposal: WP.29/2011/62

Adopted proposal integrated into UN R41: Revision 2 on 14 August 2012.

UN R41 | Revision 2 | Amendment 1 (2014)
17 Oct 2014 2014-10-21 15:49:44 UTC 2 1 04 series of amendments | Supplement 1 Based upon the adopted proposal: WP.29/2014/2

Proposal approved by the GRB to update UN R41 with the latest amendment of ISO 5130:2012, to correct the typing error of the decibel unit dB(A) (corrected from db(A)) and delete the unnecessary unit, and to revise the current list in Annex 4 as an itemized list for greater clarity.

UN R41 | Revision 2 | Amendment 2 (2015)
9 Nov 2015 2015-11-26 14:58:58 UTC 2 2 04 series of amendments | Supplement 2 Based upon the adopted proposal: WP.29/2015/2

Proposal as approved by GRB to clarify certain terms and symbols used in Annex 7 (ASEP) of the regulation.

UN R41 | Revision 2 | Amendment 3 (2016)
5 Feb 2016 2016-02-10 10:35:06 UTC 2 3 04 series of amendments | Supplement 3 Based upon the adopted proposal: WP.29/2015/61

Proposal to introduce a calculated engine speed (in addition to measured engine speed) for MT vehicles and for continuously variable transmission (CVT)/automatic transmission (AT) with locked gear mechanism into UN Regulation No. 41 for the tests in Annex 3 and Annex 7 (Additional sound emission provisions – ASEP)

UN R41 | Revision 2 | Amendment 4 (2016)
28 Oct 2016 2016-11-02 14:50:02 UTC 2 4 04 series of amendments | Supplement 4 Based upon the adopted proposal: WP.29/2016/3

In response to concerns that approval agencies may not grant manufacturers the additional 1dB for L(wot) on conformity of production tests as changes had been made to Annex 6 of R41-04, GRB issued an interpretation recorded in the report of its 56th session. The proposal formalizes the interpretation as an explicit provision of the regulation.

UN R41 | Revision 2 | Amendment 5 (2017)
22 Feb 2017 2017-05-31 17:13:15 UTC 2 5 04 series of amendments | Supplement 5 Based upon the adopted proposal: WP.29/2016/46

Proposal to clarify the test procedure by explicitly excluding first gear where possible from the ASEP control range and to clarify that conditioning of a silencing system is necessary only in cases where exhaust gases come into contact with silencer fibrous materials.

UN R41 | Revision 2 | Amendment 6 (2018)
2 Nov 2018 2019-03-21 14:40:45 UTC 2 6 04 series of amendments | Supplement 6 Based upon the adopted proposal: WP.29/2018/6

Proposal to delete a description of the L4 vehicle category (motorcycles with a side car) from Annex 3 to Regulation No. 41. These vehicles fall under the scope of UN R9, having been removed from the scope of UN R41 as of the 04 series of amendments.

UN R41 | Revision 2 | Amendment 7 (2019)
8 Nov 2019 2019-12-30 12:20:12 UTC 2 7 04 series of amendments | Supplement 7 Based upon the adopted proposal: WP.29/2019/3

Proposal to require additional sound emission provisions (ASEP) testing under UN R41.

UN R41 | Revision 2 | Amendment 8 (2021)
2 Feb 2021 2021-02-25 15:27:23 UTC 2 8 04 series of amendments | Supplement 8 Based upon the adopted proposal: WP.29/2020/70

Proposal to introduce provisions for stationary noise measurements on a single-sided dual exhaust system, minimize proliferation of approval numbers from models with differences in vehicle exhaust and silencing systems, and correct an omission regarding the compensating resevoir fill time thereby aligning UN R41 with the other noise UN Regulations Nos. 9, 51 and 63.

Earlier texts may be available through the UN Official Document System.