BMW 320i Sedan 3 Series 2002 Owner's Manual
![BMW 320i Sedan 3 Series 2002 manual cover](/images/3871606ef89a764de9336f65/thumbs/thumb175x175.webp)
The recommended engine oil for the 2002 BMW 320i is synthetic 5W-30 or 5W-40, meeting BMW Longlife-01 specifications.
It is recommended to change the oil every 7,500 to 10,000 miles, or at least once a year for optimal engine performance.
Use a phosphate-free, nitrate-free ethylene glycol-based coolant, preferably BMW’s own brand or one that meets BMW's GS 94000 specifications.
To reset the service light, insert the key, turn it to position 2 (do not start the engine), press and hold the trip odometer reset button until the service message appears, then release and press the button again until “Reset” appears.
The recommended tire pressure is approximately 30 psi for the front tires and 35 psi for the rear tires, but always check the driver's side door jamb for specific recommendations.
First, check the fuse for the A/C system. If the fuse is fine, inspect the refrigerant levels and look for leaks. If these are not the issue, the problem may lie with the A/C compressor or electrical connections, requiring professional diagnostics.
Common signs include coolant leaks, overheating, a whining noise from the engine area, and a noticeable drop in coolant level.
To improve fuel efficiency, ensure regular maintenance, keep tires properly inflated, reduce unnecessary weight, drive smoothly, and use high-quality fuel.
If the Check Engine light is on, check the gas cap first to ensure it is tight. If the light persists, use an OBD-II scanner to read the trouble codes, or take the vehicle to a professional mechanic for diagnosis.
To replace the cabin air filter, locate the filter housing under the passenger side dashboard, remove the cover, take out the old filter, and insert the new filter, ensuring the airflow direction is correct. Reattach the cover securely.