The first ever car mod for GTA IV to have full tuning, the 2nd gen Coquette from GTA V with ALL tuning parts included and fully accessible, along with a moving steering wheel.
I've included the .max project file for anyone who wants to make their own fully tunable car.

REQUIRES v65.0 or newer of Zolika1351's Trainer/Mod Menu to work, otherwise the car is completely unusable. Using this car with v65.0 may be prone to crashing but it should get better in future versions.
PUT COQUETTETUNE.DAT INTO THE "carmods" FOLDER! (if it doesn't exist, create a folder called "carmods" in your game folder and put the .dat there)

Vehicles.ide:
coquettetune, coquettetune, car, COQUETTE, COQUETTE, VEH@LOW, VEH@LOW_HI4_HI4, 30, 999, 0.2417, 0.2417, 0, 5, 1.0 ,0, sports+wheelangle:-18.7+ext_conv+ext_strong

txdp
vehshareV, vehshare
coquettetune, vehshareV

Carcols.dat:
coquettetune, 0,0,50, 1,1,8, 11,11,92, 13,13,98, 33,33,89, 34,34,27, 49,49,53, 53,53,58, 57,57,60, 113,35,113, 74,74,63, 80,80,84, 2,2,63, 21,21,72, 22,22,72, 13,13,91, 19,19,93,