Mazda 3 Owners Manual: Emission Control System

Mazda 3 Owners Manual / Before Driving / Fuel and Emission / Fuel and Engine Exhaust Precautions / Emission Control System

This vehicle is equipped with an emission control system (the catalytic converter is part of this system) that enables the vehicle to comply with existing exhaust emissions requirements.

WARNING Never park over or near anything fl ammable: Parking over or near anything fl ammable, such as dry grass, is dangerous. Even with the engine turned off , the exhaust system remains very hot after normal use and could ignite anything fl ammable. A resulting fi re could cause serious injury or death.

CAUTION Ignoring the following precautions could cause lead to accumulate on the catalyst inside the converter or cause the converter to get very hot. Either condition will damage the converter and cause poor performance.

USE ONLY UNLEADED FUEL.
Do not drive your Mazda with any sign of engine malfunction.
Do not coast with the ignition switched off .
Do not descend steep grades in gear with the ignition switched off .
Do not operate the engine at high idle for more than 2 minutes.
Do not tamper with the emission control system. All inspections and adjustments must be made by a qualifi ed technician.
Do not push-start or pull-start your vehicle.

NOTE

Under U.S. federal law, any modification to the original-equipment emission control system before the first sale and registration of a vehicle is subject to penalties. In some states, such modification made on a used vehicle is also subject to penalties.
While the engine is off, the sound of a valve opening and closing can be heard at the rear of the vehicle, however this does not indicate an abnormality. The vehicle has a selfchecking device and it operates while the engine is off.

Fuel Requirements

Vehicles with catalytic converters or oxygen sensors must use ONLY UNLEADED FUEL, which will reduce exhaust emissions and keep spark plug fouling to a minimum. This vehicle will perform best wit ...

Engine Exhaust (Carbon monoxide)

WARNING Do not drive your vehicle if you smell exhaust gas inside the vehicle: Engine exhaust gas is dangerous. This gas contains carbon monoxide (CO), which is colorless, odor ...

Other materials:

Active Adaptive Shift (AAS)
Active Adaptive Shift (AAS) automatically controls the transaxle shift points to best suit the road conditions and driver input. This improves driving feel. The transaxle may switch to AAS mode when driving up and down slopes, cornering, driving at high elevations, or depressing the accelerat ...

Clutch Fluid Inspection [C66 M R]
NOTE: A common reserve tank is used for the clutch system and brake system. 1. Verify that the clutch fluid is between the MIN mark and the MAX mark. Verify that there is no clutch fluid leakage then add clutch fluid to the level between the MIN mark and the MAX mark.. ...

Oil Control Valve (OCV) Removal/Installation [Mzr 2.0, Mzr 2.5]
1. Remove the battery cover.. 2. Disconnect the negative battery cable.. 3. Remove the plug hole plate.. 4. Disconnect the wiring harness. 5. Remove the ignition coils.. 6. Remove the ventilation hose. 7. Remove the oil level gauge. 8. Remove the cylinder head cover.. 9. Remove in th ...