Well I make my own list of cars with changed audio then.
Edit: Last updated the list on May 19th 2025
Update 20.1 Hotifx:
- Fixed an issue with low volume car audio for the 2005 Honda NSX-R when under 5k revs.
Update 20:
In addition, these previous Forza Motorsport cover cars featured in the 20th Anniversary Tour have received updated audio to coincide with their new events:
- 2005 Honda NSX-R
- 2003 Nissan Fairlady Z
- 2010 Audi R8 5.2 FSI quattro
- 2009 Ferrari 458 Italia
- 2013 McLaren P1
- 2017 Ford GT
- 2018 Porsche 911 GT2 RS
Update 19:
- Car audio for the 2016 Ford Shelby GT-350R, 2015 Jaguar F-Type R Coupé, and 2011 Mercedes-Benz SLS AMG has been updated based on community feedback.
Update 18:
- Audio changes for the 1998 Toyota Supra RZ and 2020 Toyota GR Supra intended for Update 17 are included in Update 18.
- For additional information on how we’re updating the car sounds of Forza Motorsport, check out this blog, adapted from a presentation and AMA (“ask me anything”) hosted in the Forza Official Discord with the Turn 10 audio team.
Update 17:
- Updated car audio for the following vehicles based on community feedback:
- 1998 Toyota Supra RZ
- 2020 Toyota GR Supra
- Fixed a bug in the updated 2019 Lamborghini Sian FKP 37 exhaust sound.
- Fixed a bug in the updated 2021 Porsche GT3 cockpit audio.
- Fixed a bug where opponent cars were not being attenuated correctly in cockpit view. [1909391]
Update 16:
- 2021 Porsche 911 GT3 (Cockpit audio only)
- 2002 Ferrari Enzo Ferrari
Update 15:
- 1991 BMW M3
- 1994 Ferrari F355 Berlinetta
- 2013 Ferrari La Ferrari
- 2015 Ferrari F12 TDF
- 2017 Ferrari 812 Superfast
- 2015 McLaren P1 GTR
Update 14:
- 2010 Lamborghini Murciélago LP 670-4 SV
- 2019 Lamborghini Sian FKP 37
- 2013 McLaren P1
Update 13:
- 2022 Pagani Huayra R
- 2014 Chevrolet #3 Corvette Racing Corvette C7.R
- 2001 Acura Integra Type R
Update 7:
- 2016 Lamborghini Aventador LP750-4 SV: We’ve updated the engine audio of this car based on community feedback. [1685647]
- 2018 Ferrari 812 Superfast: We’ve updated the engine audio of this car based on community feedback. [1685698]
- 2022 Porsche 718 Cayman GT4 RS: Fixed a bug where the car was loading the incorrect audio files. [1734939]
Update 5:
- 2010 Lexus LFA: Updated inaccurate car audio. [1653741]
- 2009 Ford Focus RS: Fixed an issue where the car’s audio sounds metallic and distorted. [1661365]
Update 4:
- 2019 Dodge #9 American V8 Road Racing TA Challenger: Fixed an issue where the car had no engine audio in gameplay. [1663644]
- 1989 Mercedes-Benz #63 Sauber-Mercedes C 9: Fixed issue where the V8 engine audio is inaccurate compared to its real-life counterpart. [1651824]
Update 3:
- 2020 KTM X-Bow GT2: Fixed an issue in which the car is using 4-cylinder engine audio while having a 5-cylinder engine. [1639286]
- 1991 Mazda 787B: Fixed issue that caused radiator texture to be stretched in multiple locations on the car and updated audio based on community feedback. [1642967]
- 2004 Mercedes-Benz C 32 AMG: Fixed an issue where the exhaust backfire has no audio after engine and supercharger upgrades have been installed. [1640303]
I maybe forgotten some. They don’t always differentiate between audio and other issues. I always searched for the word “Audio” in the patch notes.
Edit:
I will keep updating that list, everytime there are audio changes listed in patch notes for cars.