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Old September 25th, 2015, 09:45   #11
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Default EPA letter to manufacturers regarding future real-world emissions testing

CD-15-24 (LDV)
September 25, 2015

SUBJECT: EPA Conducted Confirmatory Testing

Dear Manufacturer:

Per the regulations of 40 CFR 86.1809, EPA may test or require testing on any vehicle at a designated location, using driving cycles and conditions that may reasonably be expected to be encountered in normal operation and use, for the purposes of investigating a potential defeat device. Such testing can be expected in addition to the standard emissions test cycles when Emissions Data Vehicles (EDV), and Fuel Economy Data Vehicles (FEDV) are tested by EPA.

Manufacturers should expect that this additional testing may add time to the confirmatory test process and that additional mileage may be accumulated on the EDVs and FEDVs.

The regulations of 40 CFR 86.1836 also require manufacturers to supply production vehicles for testing upon request.

If you have any questions, please contact your certification team representative or Linc Wehrly at 734-214-4286 or by email at

Byron J. Bunker, Director
Compliance Division
Office of Transportation and Air Quality
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