EMISSIONS SYSTEM CLASSIFICATIONS

Applicable Models

                                                                        
The emissions system classifications of MAZDA3 are varied.  See the     
following descriptions to clarify the differences.                      
                                                                        
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The 2.0L engines are only available on 4-door sedans.  There are two    
different emissions specifications.                                     
                                                                        
2.0L, FEDERAL                                                           
EPA classification is Tier 2 Bin 5 and applies to all states except CA, 
NY, MA, ME, and VT.                                                     
                                                                        
2.0L, CALIFORNIA                                                        
CARB (California Air Resources Board) classification is partial zero    
emissions vehicle (PZEV) and applies to CA, NY, MA, ME, and VT only.    
The PZEV classification means that it is classified as SULEV for exhaust
emissions and it also meets the zero evaporative emission requirements  
for emissions of fuel vapors from the fuel tank and evaporative emission
canister.  To achieve PZEV emissions, this vehicle comes with three O2  
sensors, and modified air cleaner, exhaust system, fuel tank, pistons,  
and piston rings                                                        
                                                                        
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The 2.3L engines are optional on 4-door sedans and standard on 5-door   
hatchbacks.  There are two different emissions specifications.          
                                                                        
2.3L, FEDERAL                                                           
EPA classification is Tier 2 Bin 5 and applies to all states except CA, 
NY, MA, ME, and VT.                                                     
                                                                        
2.3, CALIFORNIA                                                         
CARB classification is LEV, in the new for 2004 California LEV II       
emission program, and applies only to CA, NY, MA, ME, and VT.  The      
emission control hardware is the same, with the exception of additional 
OBD monitors for certification to California requirements.              
                                                                        
Note that for each emission type and transmission type, a different PCM 
is used.  Therefore, there are 8 different PCM part numbers that are    
available.