Hyundai Motor America Informative - 2008 Santa Fe Brake Problem Resolved
I have a 2008 Santa Fe, 3600 miles, brakes completely failed without warning 4 times.
I took it in to the dealer and same as the other folks, they couldn't replicate it. I told them to continue to drive it until they failed again, although why they couldn't take my word/description for it I don't know. Finally they failed for the mechanic and he was dumbfounded with the severity of the failure. He had to call Hyundai Techline, they said they've had a number of similar complaints but could never replicate and were anxious to solve the issue.
I just got it back after 5 days in the shop, here is what they did, verbatim from work order, so tell your Hyundai guy this is what Techline recommended and it appears to have worked (fingers crossed).
"Test drove car 120 miles, brakes at one point went to the floor when coming to an intersection. Called techline was advised this is the first case that has been able to duplicate. Was told to replace hecu and master cylinder and send back right away they want to test these parts. Replaced brake master cylinder and hecu unit. Test drove brakes are working as designed at this time. hecu abs module 58910r00 1.0 58910rp0 0.3 master cylinder 58510r00 0.8
Hope this helps!