Brazil: Heavy-duty: Emissions


PROCONVE P7 standards, which are based on Euro V and are detailed in the tables below, have applied to all new diesel and gas engines since 2012.

Standard type
Conventional pollutant emission limits

Maximum total weight greater than 3,856 kg or vehicle in running weight greater than 2,720 kg, designed for the transportation of passengers and/or goods


The motor vehicle emission control program in Brazil is known as Programa de Controle da Poluição do Ar por Veículos Automotores (PROCONVE). Heavy-duty vehicle emission standards (“P” standards) generally follow the European precedent for numerical emission limits and certification test cycle. Important regulatory steps in Brazil are summarized in the following table:

Implementation dates
Standard Resolution Euro Equivalent Implementation date
PROCONVE P-1 Conama 18/1986 1987 (Urban buses)
1989 (100%)
PROCONVE P-2 Conama 08/1993 Euro 0 1994 (80%)
1996 (100%)
PROCONVE P-3 Euro I 1994 (Urban buses)
1996 (80%)
2000 (100%)
PROCONVE P-4 Euro II 1998 (Urban buses)
2000 (80%)
2002 (100%)
PROCONVE P-5 Conama 315/2002 Euro III 2004 (Urban buses)
2005 (Micro buses)
2005 (40%)
2006 (100%)
PROCONVE P-6 Conama 315/2002 Euro IV Never implemented because the ULSD would not be available;
P-5 was continued through 2011
PROCONVE P-7 Conama 403/2008 Euro V January 2012 (100%)

Technical Standards

MY 1994-2002

Emissions standards for new MY 1994-2002 diesel fueled trucks and buses in Brazil are summarized below. The same standards also applied to light-duty trucks. All truck and bus engines, including those used in light trucks, are certified on an engine dynamometer (test cycle ECE R-49).

Emission Standards for MY 1994-2002 Diesel-Fueled Trucks and Buses
Standard Euro Equivalent Yeare Vehicle Category CO HC NOx PM
P-2 Euro 0 1994 Allb 11.2 2.45 14.4
P-3 Euro Ia 1994 Urban buses 4.9 1.23 9.0
1996 Allb 4.9 1.23 9.0 0.4c
P-4 Euro II 1998 Urban buses 4.0 1.1 7.0 0.15b
2000 Allb 4.0 1.1 7.0 0.15b
a. production conformity limit
b. Except buses as noted
c. multiply by a factor of 1.7 for engines below 85 kW
d. 0.25 g/kWh for engines up to 0.7 liter, rated speed above 3000 rpm
e. Year indicates beginning of phase-in period except for buses

In addition to the above standards, new engines must meet the following free acceleration smoke limits (effective March 1994):

  • 0.83/m (30 HSU) for naturally aspirated engines
  • 1.19/m (40 HSU) for turbocharged engines

MY 2006 and Later

More stringent standards applicable to heavy-duty engines effective 2006 are summarized below. Diesel engines are tested over both the ESC and ETC tests, while gas engines are tested over the ETC test only (see also EU regulations). The P7 stage also introduces a 25 ppm limit for ammonia (NH3) to be met over both test cycles.

Emission Standards for HD Diesel And Gas Engines
(Durability: 160,000 km/5 years)
Tier Date Test CO THC NMHC NOx PM† Smoke
g/kWh m-1
PROCONVE P5 1 January 20061,2,3 ESC/ELR 2.1 0.66 5.0 0.10 or 0.135 0.8
ETC4 5.45 0.78 5.0 0.16 or 0.215
PROCONVE P6 1 January 20096 ESC/ELR 1.5 0.46 3.5 0.02 0.5
ETC 4.0 0.55 3.5 0.03
PROCONVE P7 1 January 2012 ESC/ELR 1.5 0.46 2.0 0.02 0.5
ETC 4.0 0.55 2.0 0.03
† Applicable to diesel engines only
1. 1 January 2004 for urban buses or 60% of annual production of urban buses (100% by 01/01/2005); in that case, manufacturers must produce at least 60% observing PROCONVE P5 for the non-urban bus HD annual production
2. 1 January 2005 for micro-buses
3. 1 January 2005 40% of production/year of HD (except urban bus and micro-bus) per manufacturer
4. Diesel vehicles without catalysts or particulate filters can be tested over ESC cycle only
5. For engines of less than 0.75 dm3 swept volume per cylinder and a rated power speed of more than 3000 rpm
6. PROCONVE P6 standards were never implemented, P5 standards remain in effect through the end of 2011

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