How to Change the Engine Oil and Filter on a BMW 3 Series E46

To change the engine oil and oil filter on a BMW 320d E46, work on a flat and safe surface, preferably with the engine warm. Turn off the engine, open the hood, and prepare a container for the used oil, gloves, and rags.

If you need to access from underneath, lift the car with a jack and jack stands before going under the vehicle. For draining, locate the oil pan drain plug and position the container under the drain point.

Loosen the plug with the appropriate tool and allow the oil to completely drain. During drainage, avoid spilling on components and shields, then reinstall the plug with its seal in good condition and tighten it without overdoing it. Next, move to the oil filter, which in this configuration is a cartridge located in the engine compartment.

Unscrew the filter housing cap with the correct socket, remove the old cartridge, and replace the cap seals (O-rings) if applicable, lightly lubricating them with clean oil before reassembly. Insert the new cartridge into the filter housing and screw the cap back on securely.

At this point, pour new oil into the filler neck, adding it gradually while checking the level. Start the engine for a few seconds, turn it off, and wait a few minutes, then recheck the level and top off if necessary.