Romain Grosjean believes that the brake material used by Haas is the root cause of the multiple brake failures suffered by the Frenchman recently.
The problem came to a head last Friday when Grosjean endured another problem in free practice in Suzuka, subsequently saying that the issue was "unacceptable" and "dangerous."
While the Haas driver enjoyed a relatively trouble-free race on Sunday, he insisted the Brembo brakes remain a problem.
"I think it's a material issue, said Grosjean."
"I'm very sensitive to the brakes so they can improve and that would help everyone. They are going to work and hopefully they will find a solution."
Team boss Guenther Steiner also underlined the fact that the brakes were not consistent enough, which in turn has an impact on a driver's confidence.
"It's not good enough and the biggest thing is if they work, they work fine but they're not consistent so you assume they work badly," explained Steiner.
"It's a strange thing to explain. If you know they're working good then you can brake at the last centimetre.
"You have always a buffer in there and then you realise you could've braked later but you cannot because if they are inconsistent or they don't do what they should be doing, you are off like we had in practice.
"You keep on working, it keeps us in our jobs!"
Scene at the 2016 Japanese Grand Prix
Japanese Grand Prix - Quotes of the week
DRIVER RATINGS: Japanese Grand Prix
Breakfast with ... Tetsuo Tsugawa
FEATURE: Silbermann says... Snapchat and soap in Suzuka
Keep up to date with all the F1 news via Facebook and Twitter
Red Bull has opted for caution over urgency, confirming that Isack Hadjar will miss this…
Ferrari is turning up the volume for its homecoming at Monza, with the Scuderia confirming…
On this day in 2001, Michael Schumacher became the sole record holder of the greatest…
Haas has no intention of waving the white flag on its troubled 2026 Formula 1…
Red Bull has moved decisively to secure the man it believes can shape the next…
McLaren heads to Monza this week with momentum on its side and a fresh weapon…