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What is your question?
Happens at 40 mph
What makes this problem better or worse?
Worse higher speed
How long has your 2003 Toyota MR2 Spyder had this problem?
Months
1 Reply
This sounds crazy dangerous; I'd recommend immediate evaluation by a professional - do not drive. I do not feel like a master cylinder would be the culprit for this, but other brake system components instead.