NHTSA owner complaints about this part run furthest above the usual seasonal share in June: about 45% more of them name an incident that month than complaints about any part would predict. A complaint is a report, not a measured failure.
What it shows: June is the largest at 13% (all: 9%), followed by January at 6% (all: 9%); the smallest shown is October at 5% (all: 8%).
Data and chart by CalcScrape: Brake Fluid Flush Cost Calculator