Build 25254921

This Hotfix contains some fixes and updates for the 2026 Season 4 Release.

You can find the Release Notes for this Hotfix below, or on the iRacing Forums here: https://forums.iracing.com/discussion/100023/2026-season-4-hotfix-1-release-notes-2026-09-10-02/p1?new=1

2026 Season 4 Hotfix 1 Release Notes [2026.09.10.02]

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Patch Release:

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• This downtime was planned and is required for fixing an issue with both Caterham cars, as well as two crashes with iRacing.

iRacing Simulator
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User Interface

• Fixed a crash that could occur when minimizing the SIM window.

• Fixed a crash that could occur when using the VCR controls while viewing a replay.

Cars

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Caterham 420R

• Adjusted the damage properties on the rear suspension that allows the rear axle to translate fully.

  • This resolves an issue that could make it impossible for drivers to exit their pit stall.

  • This will fundamentally improve the handling of the car.

Caterham Academy

• Adjusted the damage properties on the rear suspension that allows the rear axle to translate fully.

  • This resolves an issue that could make it impossible for drivers to exit their pit stall.

  • This will fundamentally improve the handling of the car.