StacksVerified U.S. regulatory reference

40 CFR §85.2118

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The aftermarket part manufacturer shall be required to recertify any part which:
  1. (a)Was certified pursuant to § 85.2114(b) and to which modifications are subsequently made which could affect the results of any test or judgment made that the part meets all of the applicable Emission-Critical Parameters;
  2. (b)Was certified pursuant to § 85.2114(c) and to which modifications are made which are likely to affect emissions or the capability of the part to meet any other requirement of this subpart; or
  3. (c)Was certified and is subsequently modified in a manner affecting the durability of the part or any emission control device, engine or the vehicle upon which such part is installed.