Mazda 3 4-Door 2004 Maintenance Schedule Manual

To reset the tire pressure monitoring system, ensure all tires are inflated to the correct pressure. Turn the ignition to the "On" position without starting the engine, then press and hold the tire pressure monitoring system reset button until the TPMS indicator light blinks twice.
The recommended engine oil for a 2004 Mazda 3 4-Door is 5W-20 or 5W-30 viscosity grade, meeting the API SL or ILSAC GF-3 standards.
Start by checking the A/C fuse and relay in the fuse box. Ensure that the refrigerant level is adequate; if low, consider recharging it. Inspect the compressor and drive belt for any visible damage or wear. If the issue persists, consult a professional technician for a detailed diagnosis.
To replace the brake pads, first lift the vehicle and remove the wheels. Remove the caliper bolts and slide the caliper off the rotor. Take out the old brake pads and replace them with new ones. Reinstall the caliper and ensure everything is secured before putting the wheels back on.
Poor fuel economy can be caused by several factors, including under-inflated tires, dirty air filters, faulty spark plugs, or issues with the fuel injection system. Checking and maintaining these components can help improve fuel efficiency.
Open the hood and locate the back of the headlight assembly. Remove the power connector from the bulb, then take off the rubber cover. Release the metal clip holding the bulb in place and remove the old bulb. Insert the new bulb, secure the clip, replace the rubber cover, and reconnect the power connector.
If the check engine light illuminates, check for any loose or damaged gas cap as this is a common cause. If the cap is fine, use an OBD-II scanner to read the error codes for further diagnosis. It's advisable to consult a professional mechanic to address any serious issues indicated by the error codes.
It is generally recommended to change the transmission fluid every 30,000 to 60,000 miles under normal driving conditions. Refer to your owner's manual for the specific maintenance schedule for your vehicle.
Symptoms of a failing alternator include dimming headlights, a dead battery, unusual noises from the engine bay, and electrical issues such as malfunctioning accessories. If you experience these symptoms, have the alternator tested and replaced if necessary.
A basic tune-up includes replacing the spark plugs, inspecting and replacing the air filter, checking the ignition system, inspecting the belts and hoses, and ensuring the battery is in good condition. Regular maintenance like oil changes and checking fluid levels are also essential.