2003 Subaru Impreza Owner's Manual - Page 360
2003 Subaru Impreza Manual
Page 360 highlights
Maintenance and service Rear differential gear oil J Checking the gear oil level Your vehicle may be equipped with a rear differential protector. The differential protector provides protection to the rear differential assembly during off-road use. Removal of the rear differential protector is not required when checking the oil level. 1) Filler hole 2) Drain hole 3) Oil level Remove the plug from the filler hole and check the oil level. The oil level should be kept even with the bottom of the filler hole. If the oil level is below the bottom edge of the hole, add oil through the filler hole to raise the level. 1) Filler plug 2) Drain plug CAUTION If the vehicle requires frequent refilling, there may be an oil leak. If you suspect a problem, have the vehicle checked at your SUBARU dealer. - CONTINUED - 11-31