My kids have always complained how bouncy when they are seated at the rear of my Alza compared to my wife's Mazda 2. It could be due to Alza rear suspension design which is catered to carry a higher load since this is a 5+2 MPV and hence, a stiffer rear spring. Anyhow, as the car is more than 9 years old, it won't ride as good as when it was new.
At first, I changed the rear dampers to stock ones as the previous ones was Sachs damper, thinking that this could be the cause. I was wrong, the ride was almost the same and I have wasted almost RM300. That Sachs damper was only two years of use so it was unlikely the cause.
The next component could be the rear spring bushings. Rubber will naturally harden over time so this could be the cause. Spent RM80 to change both the top and bottom bushings for the rear spring and I have opted for a thicker 1 inch for the top bushing. The result was satisfying. From the front seat, I can feel there is a more cushy feel compared to before, not sure if it is due to the new rubber or thicker bushing but this is something you can consider if the ride got harsh overtime. That thicker bushing also did not increase the rear ride height significantly at all, almost unnoticeable.
Below are the photo showing the amount of gap increased before and after putting the thicker bushing:
Before:
At first, I changed the rear dampers to stock ones as the previous ones was Sachs damper, thinking that this could be the cause. I was wrong, the ride was almost the same and I have wasted almost RM300. That Sachs damper was only two years of use so it was unlikely the cause.
The next component could be the rear spring bushings. Rubber will naturally harden over time so this could be the cause. Spent RM80 to change both the top and bottom bushings for the rear spring and I have opted for a thicker 1 inch for the top bushing. The result was satisfying. From the front seat, I can feel there is a more cushy feel compared to before, not sure if it is due to the new rubber or thicker bushing but this is something you can consider if the ride got harsh overtime. That thicker bushing also did not increase the rear ride height significantly at all, almost unnoticeable.
Below are the photo showing the amount of gap increased before and after putting the thicker bushing:
Before:
After:
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