The extension of UN R90 to include brake drums and discs introduced the concept of a part “identical” to the OE part. Because such parts would have been approved under UN R13/13-H, they were exempted from redundant approval under R90. This proposal would similarly define and exempt brake linings.

Proposal from the Federation of European Manufactures of Friction Materials (FEMFM) to align the requirements for chemically and physically identical brake lining assemblies or drum brake linings.

Text prepared by the Federation of European Manufacturers of Friction Materials (FEMFM) proposing to exclude brake linings and/or lining assemblies that are chemically and physically identical to the original part from the requirements (as is currently the practice for brake discs and drums).