Agreed with the above. I don't drive much (<6Kmiles/yr), so aiming at the 2 yr flush cycle.
At 50K, it should of been done several times IMO.
I use the power bleeder from motive (
Motive Products #1 Selling DIY Brake Bleeder). Makes the job a simple one person operation. Make sure to use a DOT4 fluid, not DOT3. Also, this would be a good time to bleed/flush the clutch too.