A good car in terms of modeling and design. But the balance is not good.
Unstable on the track, difficult to control. I thought the balance issue was due to the frame, so I examined the frame of the car and modified the frame a bit. I took the weight balance lower than before. I hope it works for you.
The car you modded is Tofaş Doğan SLX. These 2 sources clearly show this.
All you do is change the engine type and traction system and stream the mod. I also ask you to do this correctly. In addition, the chassis of the car is weak, it will be very good if you check the chassis.
This car is not a Jetta, this car is the Tofaş Doğan SLX specially produced for the Turkish domestic market. It is the version of the Fiat Regata vehicle produced in Turkey under license. It is a RWD car. It is a vehicle with an inline engine system.