The definitions of Sec. 86.000-2 continue to apply to 2000 and later model year vehicles. The definitions listed in this section apply beginning with the 2001 model year.
Useful life means:
(1) For light-duty vehicles, and for light light-duty trucks not subject to the Tier 0 standards of Sec. 86.094-9(a), intermediate useful life and/or full useful life. Intermediate useful life is a period of use of 5 years or 50,000 miles, whichever occurs first. Full useful life is a period of use of 10 years or 100,000 miles, whichever occurs first, except as otherwise noted in Sec. 86.094-9. The useful life of evaporative and/or refueling emission control systems on the portion of these vehicles subject to the evaporative emission test requirements of Sec. 86.130-96, and/or the refueling emission test requirements of Sec. 86.151-2001, is defined as a period of use of 10 years or 100,000 miles, whichever occurs first.
(2) For light light-duty trucks subject to the Tier 0 standards of Sec. 86.094-9(a), and for heavy light-duty truck engine families, intermediate and/or full useful life. Intermediate useful life is a period of use of 5 years or 50,000 miles, whichever occurs first. Full useful life is a period of use of 11 years or 120,000 miles, whichever occurs first. The useful life of evaporative emission and/or refueling control systems on the portion of these vehicles subject to the evaporative emission test requirements of Sec. 86.130-96, and/or the refueling emission test requirements of Sec. 86.151-2001, is also defined as a period of 11 years or 120,000 miles, whichever occurs first.
(3) For an Otto-cycle heavy-duty engine family:
(i) For hydrocarbon and carbon monoxide standards, a period of use of 8 years or 110,000 miles, whichever first occurs.
(ii) For the oxides of nitrogen standard, a period of use of 10 years or 110,000 miles, whichever first occurs.
(iii) For the portion of evaporative emission control systems subject to the evaporative emission test requirements of Sec. 86.1230-96, a period of use of 10 years or 110,000 miles, whichever occurs first.
(4) For a diesel heavy-duty engine family:
(i) For light heavy-duty diesel engines, for hydrocarbon, carbon monoxide, and particulate standards, a period of use of 8 years or 110,000 miles, whichever first occurs.
(ii) For light heavy-duty diesel engines, for the oxides of nitrogen standard, a period of use of 10 years or 110,000 miles, whichever first occurs.
(iii) For medium heavy-duty diesel engines, for hydrocarbon, carbon monoxide, and particulate standards, a period of use of 8 years or 185,000 miles, whichever first occurs.
(iv) For medium heavy-duty diesel engines, for the oxides of nitrogen standard, a period of use of 10 years or 185,000 miles, whichever first occurs.
(v) For heavy heavy-duty diesel engines, for hydrocarbon, carbon monoxide, and particulate standards, a period of use of 8 years or 290,000 miles, whichever first occurs, except as provided in paragraph (4)(vii) of this definition.
(vi) For heavy heavy-duty diesel engines, for the oxides of nitrogen standard, a period of use of 10 years or 290,000 miles, whichever first occurs.
(vii) For heavy heavy-duty diesel engines used in urban buses, for the particulate standard, a period of use of 10 years or 290,000 miles, whichever first occurs. [59 FR 16281, Apr. 6, 1994, as amended at 61 FR 54886, Oct. 22, 1996]