For 1990-2009 cars

The entire hydraulic system should be thoroughly flushed with clean brake fluid if there is any doubt as to the grade of fluid in the system, or if fluid has been used that contains the slightest trace of mineral oil.

All rubber parts which have been subjected to the contaminated fluid must be replaced before flushing the system.

Flushing is performed at each wheel in the same way that bleeding is done, except that new fluid must be forced through the system until it emerges clear in color. About one quart of new fluid is needed to flush the system.

After completing the flushing operation at all bleeder valves, check that the master cylinder is filled to the correct level.