I am writing to file a complaint regarding my 2023 Toyota GR Corolla Circuit Edition. The issue pertains to the ECU programming, which was not properly calibrated for the wheels that came with this model. Instead, the weight and dimensions from the Morizo Edition were utilized. This discrepancy causes the vehicle to inaccurately register speed, which is a significant safety concern. The malfunctioning component is the ECU, and it is available for inspection upon request. The inaccurate speedometer readings put my safety and the safety of others at risk by potentially causing unintentional speeding, which could lead to traffic violations and increased risk of accidents. Additionally, the inaccurate speed readings can affect other vehicle systems, such as collision alerts, adaptive cruise control, and braking systems, which rely on accurate speed data to function correctly. For example, collision alerts may not activate in time, adaptive cruise control may not maintain safe distances, and braking systems may not respond appropriately to speed changes. Furthermore, the driver display includes a light that indicates when the vehicle is exceeding the detected speed limit for the current area, which is rendered unreliable due to the inaccurate speedometer. Additionally, the console only displays speed in kilometers per hour (km/h) with no option to switch to miles per hour (mph), which is problematic for North American vehicles and other countries that use mph. The low fuel light also comes on with 20 miles left, which could be related to the same calibration issue affecting the speedometer and other systems. The problem has been reproduced and confirmed by an independent service center. However, the vehicle has not yet been inspected by the manufacturer, police, or insurance representatives. There were no warning lamps or messages indicating the problem prior to the failure, and the issue was first noticed shortly after taking delivery of the vehicle.

- Wamego, KS, USA

The 2024 whom are being sold at the same time as the 2023 GR Corollas have had improvements to both the front brake cooling with aluminum and have had the ducting reopened after the safety correction. To ensure the safety of the drivers and passengers, quality of the vehicle and its longevity. Recommend recalling all 2023 circuit editions to also adjust the from driver and passenger side brakes and their coolant ducting to be on par with the 2024 versions. The 2023 versions over have paid higher markups and have heavier rims due to inequality currently being provided by Toyota on the GR Corollas. We were originally informed that all ducting would be functional only to be missing parts due to shortages and now I am at risk of a flaw in the overheating of our front brakes. Request recall to modify the 2023 version before people start trying to fix it themselves as they were originally promised and could potentially cause major safety or fire hazards.

- Wamego, KS, USA