Haas boss Guenther Steiner admits the team is considering switching brake suppliers after another failure led to a "bittersweet" home race at the U.S. Grand Prix.
Haas' recent brake issues continued in Austin as Esteban Gutierrez retired, prompting current supplier Brembo to promise it would "carefully investigate". Brembo's initial statement said: "it would seem that in correspondence with the front left wheel a problem in the dragging area of the disc has been identified."
Steiner says the failure overshadowed the team's return to points.
"We had a tough Friday and Saturday so it feels pretty good," he said after the race. "But it's bittersweet because, again with Esteban, a brake failure, it's nothing to be proud of. But Romain [Grosjean] getting into the points from 17th is an achievement and we're very happy with it and it shows that everyone didn't give up, they carried on pushing and we got the result for it."
Though the Brembo investigation is ongoing, Steiner confirmed the team is ready to test Carbon Industrie materials before the end of 2017.
"We will test other materials, we need to do something. We cannot keep on breaking them as Esteban was in a good position. It's the brakes. Brembo is doing their utmost to help find out but we need to as well and do what we need to do for ourselves."
When asked why the team has struggled so much with brakes this year, Steiner said: "I don't know, otherwise we wouldn't have it. Brembo is investigating, let's see if they find something wrong with it. We don't know what it is wrong."