Just got my car yesterday. So far no knocking sound when going over bump or cruising on uneven roads.

im wondering, can the mazda 6 rear spoiler fit mazda 3 ?

Today I drove the car to Ipoh from KL.
Based on my observation, here are the things that I found.

1. Tyre noise very noisy ( the noise from the front tyre)
2. Dashboard got rattling sound when going through rough road. Like driving kancil.
3. Got sound coming from glove box. It sound like it's very loose.
4. No wind noise. Cruising at 120 - 130
5. Thanks to lumbar seat. Very comfortable throughout the journey.

Regarding the dashboard ( driver side ) rattling sound, I adjust the steering height by lowering it, the rattling sound reduced a lot. Not sure if that really help or not.