NHTSA Complaint #11467509 — 2009 MERCURY MILAN

Brake pedal going to floor extending stopping distance. Early in 2022 I took it in for recall S1954. HCU passed test and dealer replaced DOT3 brake fluid with DOt4. 5/24/2022 Brake pedal started going to floor again. Dealer performed self test of hcu and electronic bleed hcu and said pedal was somewhat better but needed $400 of brake work to for Brake pads, lining and turn rotors. Car functioned fine for a few days. In early June I was driving on a wet street and put on the brakes. It appeared the ABS system was trying to kick in and suddenly the pedal again went to the floor. I was barely able to miss rear-ending a city bus. I pulled into a gas station, turned the car off. When I started it again the brake pedal went to the floor. After pumping it a number of times it came back up and was again functioning. Took it to dealer on 6/1/22. Dealer again tested the hcu test which once again it passed. They could find no other problems. Dealers recommended replacing the abs modlule and master cylinder to the tune of $1,400. Seems like they can test and find out which part isn't malfunctioning (hcu which is under recall), but cant test to find out which part is malfunctioning (ABS module or master cylinder) There is obviously still serious issue with the brake system on these cars that is not being corrected by the initial hcu recall. It needs to be fixed before someone is killed. There were no warning lights or messages relating to the brakes.