Carlos Sainz’s Williams suffers a rear-brake fire in FP1 for the 2026 Azerbaijan Grand Prix in Baku, forcing an early return to the garage and spotlighting wider braking concerns.

Williams extinguishes and repairs the issue swiftly, yet multiple drivers report problems within the opening 15 minutes, indicating a pattern rather than isolated faults.

Red Bull returnee Isack Hadjar, back after a wrist injury layoff, experiences severe pulling under braking and narrowly avoids the barriers as the car veers unpredictably.

McLaren’s Oscar Piastri then reports significant vibration, calling it “twice as bad as anything I’ve ever had,” a level that clearly risks confidence and consistency over long runs.

Alex Albon also flags erratic brake pull and late engagement on his Williams, adding to a growing list of anomalies across the field.

With both Williams drivers compromised at times, the issues coincide with the team’s ongoing development push, including a recent Williams F1 upgrade and Sainz’s stated hopes for progress.

Baku’s layout combines long straights with heavy braking zones, amplifying heat management demands. Teams will examine duct sizing, blanking, pad glazing, and brake-by-wire tuning to stabilise performance.

With practice time limited, the priority is restoring predictability before qualifying. Changes remain permitted pre-parc fermé, so teams can refine cooling packages and bias maps without penalty.

Williams will also scrutinise whether set‑up direction suits ambient conditions, amid recent Baku upgrade concerns. Correlation, not causation, is assumed until data proves otherwise.

Despite the flash fire, Sainz returns to running after repairs, underlining Williams’ responsiveness and the urgency to bank laps for correlation and cooling validation.

The opening session sets an uneasy tone. Brake confidence often dictates overtaking risk and tyre life in Baku, so resolving these issues could shape strategy and race pace.

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Daniel Miller

Daniel Miller reports on Formula 1 Grand Prix weekends with race-day analysis, team-radio highlights, and point-standings updates. He explains power-unit upgrades, aerodynamic developments, and driver rivalries in straightforward, SEO-friendly language for a global F1 audience.