The particular demands of Mexico City and the Autódromo Hermanos Rodríguez give rise to the lion’s share of the updates brought by teams to the 2023 FIA Formula 1 Mexico City Grand Prix. 

At more than 2,200 metres above sea level Mexico City’s high altitude means thin air, poorer than normal heat dissipation from elements such as power units (which are already working harder in the low density air) and brakes. 

In light of this deficiency, teams have focused on improving cooling for this weekend’s event, with Red Bull Racing, Ferrari, Alpine, McLaren, Haas and Williams all bringing either revised cooling louvres or brake ducts to Mexico. 

Red Bull’s circuit-specific update features enlarged forward exit louvres for the right side to improve cooling, while Ferrari add cooling exit gurneys. Alpine’s A523 gets deeper mid louvres than the previous maximum cooling louvres seen on the car, as well as a bigger Mexico-specific engine cover on which the panel exit at the rear of the car provides higher cooling levels.  

McLaren, too, have changed the geometry of MCL60’s engine cover to allow for increased mass flow through the radiators. McLaren have also brought a Mexico-spec new front brake duct with a larger scoop to improve brake cooling. 

Haas bring cooling-related changes to the louvres and engine covers seen on their updated car in Austin and like McLaren, the US squad have revised the front brake duct scoop for better cooling. AlphaTauri also bring circuit-specific front brake ducts and a larger engine cover exit, which increases mass flow through the central radiator cores. 

It’s a similar story at Williams, with the Grove outfit also bringing a new engine cover – "to better cool the PU and gearbox fluids" – and altered louvred, although Williams say that it will only be used if required. 

Alfa Romeo are the only team to bring a general performance enhancing update to Mexico, with the Swiss team debuting revised rear brake ducts to work in conjunction with the floor introduced in Austin. The new parts are designed to improve the aerodynamic efficiency of the car and generate downforce. 

There are no changes at Mercedes or Aston Martin. 

You can see the full list of changes below as submitted by the teams below: