Hi I have a 2003 Nissan 350z. I’ve been having this issue for some quite some time now and I’ve done everything possible I could even been to the mechanic I can’t figure it out. The car drives the way it’s supposed to when I’m going below 80-90km/h but once I go over 90km/h and change lanes or brake the car starts swaying it’s like the cars unstable unbalanced completely it’s not even possible to drive on the highway how unsafe it is.everything ive replaced since it started happening.
- Isr upper adjustable control arms
- rear adjustable toe arms
-rear wheel bearing
-new rims
- new tires
-balance
​​​​​​-alignment
first time it happen right after I did a pull. I also am lowered on tien mono flex coilovers. Please if anyone has any idea what it can be, thank you 🙏