Mercedes Reliability Issue Halts Kimi Antonelli During Final Test Day
Mercedes faced a reliability setback on the final testing morning in Bahrain when Kimi Antonelli’s W17 stalled after Turn 10, prompting a red flag. Antonelli’s 1:33.916 lap kept him second overall, while his earlier 1:32.803 remains the fastest of the weekend. The issue raises concerns over Mercedes’ new high‑compression engine as the team prepares for the season opener.
Mercedes reliability issue halts Kimi Antonelli during final test day
Reliability issues snagged Mercedes on the last morning of pre‑season testing in Bahrain when 19‑year‑old Kimi Antonelli’s W17 stalled after Turn 10, prompting a red‑flag stoppage.
Why it matters:
The incident comes at a critical juncture for a team that entered the 2026 season as the clear favorite. A power‑unit hiccup not only jeopardises Antonelli’s final lap count but also raises questions about the new compression‑ratio design that has already drawn scrutiny from rivals and the FIA. Early‑season reliability will be a decisive factor in Mercedes’ bid to reclaim the championship.
The details:
- Red‑flag trigger – Antonelli’s car lost apparent power deployment just past Turn 10, forcing officials to stop the session.
- Lap count – He completed 49 laps before the stoppage.
- Timing – A best lap of 1:33.916 placed him second on the overall time sheets at the moment.
- Benchmark – Charles Leclerc leads the session with 1:33.689, a narrow two‑tenths of a second ahead.
- Fastest overall – Antonelli posted 1:32.803 on the previous evening, the quickest time across both official test days.
- Power‑unit controversy – The W17 runs a new, higher compression‑ratio engine, a feature under the microscope after rival teams raised concerns.
- Team outlook – Mercedes remains the pre‑season favorite, but the reliability glitch underscores the need for rigorous validation before the season opener.
What’s next:
Antonelli will hand the car to teammate George Russell at lunchtime, giving the experienced driver the final minutes to log data. Mercedes will likely devote the remaining testing window to diagnosing the loss‑of‑power issue and confirming the durability of the new engine spec. A swift fix could preserve their early‑season momentum; lingering problems may force a more conservative race‑strategy as the championship kicks off in Bahrain.