I usually do a brake fluid replacement every 3 years or 50,000 miles. I do it much more frequently on cars I run on road circuits. This week my TCH reached 50,000 miles so I attempted to do a fluid change. I have a bleeder with check valve so it is usually easy to do. When I opened the right rear brake bleeder valve (pressure on the brake pedal), the bleeder hose stayed attached to the valve, but fluid came out at quite high pressure.. Pumping the brakes did not push fluid through the system and the brake, ABSand check VSC lights came on the dash. No air got in the system and the fluid reservoir was not low. The brake pedal feel was normal. I drove the car to the local Toyota dealer and requested they flush the system and reset the lights. After two days, the job was completed and the bill was $535!! They did have to use scan tools and two techs to do the system flush, but at this price I have to believe that Toyota does not have brake fluid replacement in the schedule. If they do, buyer beware of the cost! Since this was "elective" I would not have had the job done if they had told me the cost. The same day I replaced the two front calipers and did a fluid change on my F250 SD with 4-wheel ABS for $90.