- 10 or 12 mm socket wrench for drain and fill plugs.
Consumables and wear parts:
- BMW specification oil
- Two sealing rings, size A22x27.
Make a short trip to allow the oil in the rear axle differential gear to reach operating temperature.
Raise the vehicle horizontally.
Unscrew the oil filler plug 1. If some oil flows out, the oil level was correct and the gearbox has no leaks. Otherwise, use your finger to check if the oil reaches the lower edge of the hole.
Attention: If there is a large lack of oil, find and eliminate the cause.
Unscrew drain plug 2 and drain the oil into a vessel underneath.
Attention: Old oil is handed over to special waste collection points. Under no circumstances should the old oil be thrown out and disposed of with household waste.
The drain plug has a magnet that collects metal chips in the gearbox. Clean the cork from metal filings. After that, tighten the plug with a tightening torque of 55 Nm.
Pour oil from the oiler.