Update 5 includes:

Addition of the Ferrari 488 Challenge car, and liveries from all three regions in which the car competes in Ferrari's legendary racing championship. This is the latest Ferrari to feature in Maranello’s single-marque championship, and the most powerful car in the series’ 25-year history. It was also the first Ferrari road car to feature a turbocharged engine since the Ferrari F40 in 1987. You can read more about it here.[pcars.games]

Addition of two new layouts to the Porsche Leipzig on-road circuit which came with the “Porsche Legends” Pack―these now include the Mazda Laguna Seca-inspired Corkscrew turn, as well as the Nürburgring-inspired Karussell turn.

• Sound for the Porsche 911 RSR upgraded.
  
• Corrected a small number of turbo and suspension issues on various cars.
  
• Resolved an issue where some drivers would appear stuck on track during qualification or race session.
  
• Resolved an issue where the end of race results would display incorrectly.
  
• Resolved multiple ghost loading issues in time trial.
  
• Polished the Online Reputation calculations, including tweaks for when players retire due to excess damage.
  
• Corrected an occasional issue of players being taken to the wrong lobby if the host set up a new lobby whilst the old one was populated.
  
• Mechanical failures no longer include aerodynamic damage.
  
• Various improvements to the AI at a number of tracks and conditions.
  
• Solved an issue in career when, under certain circumstances, the standings would not display correctly.
  
• Multiple miscellaneous other fixes and optimisations.