49 C.F.R. § 533.5

Current through September 30, 2024
Section 533.5 - Requirements
(a) Each manufacturer of light trucks shall comply with the following fleet average fuel economy standards, expressed in miles per gallon, in the model year (MY) specified as applicable:

Table 1 to § 533.5(a)

Model year2-wheel drive light trucks4-wheel drive light trucksLimited product line light trucks
Captive
imports
Other Captive
imports
Other
197917.215.8
198016.016.014.014.014.0
198116.716.715.015.014.5

Table 2 to § 533.5(a)

Model yearCombined standard2-wheel drive light trucks4-wheel drive light trucks
Captive
imports
Others Captive
imports
Others Captive
imports
Others
198217.517.518.018.016.016.0
198319.019.019.519.517.517.5
198420.020.020.320.318.518.5
198519.519.519.719.718.918.9
198620.020.020.520.519.519.5
198720.520.521.021.019.519.5
198820.520.521.021.019.519.5
198920.520.521.521.519.019.0
199020.020.020.520.519.019.0
199120.220.220.720.719.119.1

Table 3 to § 533.5(a)

Model yearCombined standard
Captive
imports
Other
199220.220.2
199320.420.4
199420.520.5
199520.620.6

Table 4 to § 533.5(a)

Model year Standard
200120.7
200220.7
200320.7
200420.7
200521.0
200621.6
200722.2
200822.5
200923.1
201023.5

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Where:

N is the total number (sum) of light trucks produced by a manufacturer;

Ni is the number (sum) of the ith light truck model type produced by a manufacturer; and

Ti is the fuel economy target of the ith light truck model type, which is determined according to the following formula, rounded to the nearest hundredth:

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Where:

Parameters a, b, c, and d are defined in Table 5 to this paragraph (a);

e = 2.718; and

x = footprint (in square feet, rounded to the nearest tenth) of the model type.

Table 5 to § 533.5(a) -Parameters for the Light Truck Fuel Economy Targets for MYs

[2008-2011]

Model year Parameters
a
(mpg)
b
(mpg)
c
(gal/mi/ft2)
d
(gal/mi)
200828.5619.9949.305.58
200930.0720.8748.005.81
201029.9621.2048.495.50
201127.1021.1056.414.28

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Where:

CAFErequired is the fleet average fuel economy standard for a given light truck fleet;

Subscript i is a designation of multiple groups of light trucks, where each group's designation, i.e., i = 1, 2, 3, etc., represents light trucks that share a unique model type and footprint within the applicable fleet;

Productioni is the number of light trucks produced for sale in the United States within eachith designation, i.e., which share the same model type and footprint; and

TARGETi is the fuel economy target in miles per gallon (mpg) applicable to the footprint of light trucks within each ith designation, i.e., which share the same model type and footprint, calculated according to either Figure 3 or 4 to this paragraph (a), as appropriate, and rounded to the nearest hundredth of a mpg, i.e., 35.455 = 35.46 mpg, and the summations in the numerator and denominator are both performed over all models in the fleet in question.

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Where:

TARGET is the fuel economy target (in mpg) applicable to vehicles of a given footprint (FOOTPRINT, in square feet);

Parameters a, b, c, and d are defined in Table 6 to this paragraph (a); and

The MIN and MAX functions take the minimum and maximum, respectively, of the included values.

Table 6 for § 533.5(a) -Parameters for the Light Truck Fuel Economy Targets for MYs

[2012-2016]

Model year Parameters
a
(mpg)
b
(mpg)
c
(gal/mi/ft2)
d
(gal/mi)
201229.8222.270.00045460.014900
201330.6722.740.00045460.013968
201431.3823.130.00045460.013225
201532.7223.850.00045460.011920
201634.4224.740.00045460.010413

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Where:

TARGET is the fuel economy target (in mpg) applicable to vehicles of a given footprint (FOOTPRINT, in square feet);

Parameters a, b, c, d, e, f, g, and h are defined in Table 7 to this paragraph (a); and

The MIN and MAX functions take the minimum and maximum, respectively, of the included values.

Table 7 to Paragraph (a) -Parameters for the Light Truck Fuel Economy Targets for MYs, 2017-2031

Model year Parameters
a (mpg)b (mpg)c (gal/mi/ft2)d (gal/mi)e (mpg)f (mpg)g (gal/mi/ft2)h (gal/mi)
201736.2625.090.00054840.00509735.1025.090.00045460.009851
201837.3625.200.00053580.00479735.3125.200.00045460.009682
201938.1625.250.00052650.00462335.4125.250.00045460.009603
202039.1125.250.00051400.00449435.4125.250.00045460.009603
202139.7125.630.0005060.00443NANANANA
202240.3126.020.0004990.00436NANANANA
202340.9326.420.0004910.00429NANANANA
202444.4826.740.0004520.00395NANANANA
202548.3529.070.0004160.00364NANANANA
202653.7332.300.0003740.00327NANANANA
202753.7332.300.000374180.00327158NANANANA
202853.7332.300.000374180.00327158NANANANA
202954.8232.960.000366700.00320615NANANANA
203055.9433.630.000359360.00314202NANANANA
2031 57.08 34.32 0.00035218 0.00307918NANANANA

(b)
(1) For model year 1979, each manufacturer may:
(i) Combine its 2- and 4-wheel drive light trucks and comply with the average fuel economy standard in paragraph (a) of this section for 2-wheel drive light trucks; or
(ii) Comply separately with the two standards specified in paragraph (a) of this section.
(2) For model year 1979, the standard specified in paragraph (a) of this section for 4-wheel drive light trucks applies only to 4-wheel drive general utility vehicles. All other 4-wheel drive light trucks in that model year shall be included in the 2-wheel drive category for compliance purposes.
(c) For model years 1980 and 1981, manufacturers of limited product line light trucks may:
(1) Comply with the separate standard for limited product line light trucks in Table 1 to paragraph (a) of this section; or
(2) Comply with the other standards specified in paragraph (a) of this section, as applicable.
(d) For model years 1982-91, each manufacturer may:
(1) Combine its 2- and 4-wheel drive light trucks (segregating captive import and other light trucks) and comply with the combined average fuel economy standard specified in paragraph (a) of this section; or
(2) Comply separately with the 2-wheel drive standards and the 4-wheel drive standards (segregating captive import and other light trucks) specified in paragraph (a) of this section.
(e) For model year 1992, each manufacturer shall comply with the average fuel economy standard specified in paragraph (a) of this section (segregating captive import and other light trucks).
(f) For each model year 1996 and thereafter, each manufacturer shall combine its captive imports with its other light trucks and comply with the fleet average fuel economy standard in paragraph (a) of this section.
(g) For model years 2008-2010, at a manufacturer's option, a manufacturer's light truck fleet may comply with the fuel economy standard calculated for each model year according to Figure 1 to paragraph (a) of this section and the appropriate values in Table 5 to paragraph (a) of this section, with said option being irrevocably chosen for that model year and reported as specified in § 537.8 of this chapter.
(h) For model year 2011, a manufacturer's light truck fleet shall comply with the fleet average fuel economy standard calculated for that model year according to Figure 1 to paragraph (a) of this section and the appropriate values in Table 5 to paragraph (a) of this section.
(i) For model years 2012-2016, a manufacturer's light truck fleet shall comply with the fleet average fuel economy standard calculated for that model year according to Figures 2 and 3 to paragraph (a) of this section and the appropriate values in Table 6 to paragraph (a) of this section.
(j) For model years 2017-2031, a manufacturer's light truck fleet shall comply with the fleet average fuel economy standard calculated for that model year according to figures 2 and 4 to paragraph (a) of this section and the appropriate values in table 7 to paragraph (a) of this section.

49 C.F.R. §533.5

85 FR 25273, 6/29/2020; 87 FR 26070, 7/1/2022; 89 FR 52949, 8/23/2024