So since we got the car, (2010 vellfire 2.4) the front left and front right makes a knocking sound when going over bumps, sometimes once or twice and sometimes several in very quick succession, the vehicle has air suspension, and this sound doesn't really change in pitch or how often it happens regardless of how high or low the car is set up, I had initially thought drop links because the noise I hear sounds all the world like a worn droplink, so I installed new ones and the sound didn't really change, inspected the sway bar bushings and they didn't look massively worn but I've replaced those with new OEM bushings and the noise still persists.

Looking under the car the only thing I can really see that has any noticeable play is the driveshafts (both sides) but given that the noise is the same regardless of if I'm accelerating or not, and I don't get any odd sounds when turning at full lock I'm doubtful that it's those.

Engine mounts look spot on and even when nudged with a bar they don't have much play at all, I've looked over the brakes and they don't seem to be doing it either (and the rattle/clunk happens even when breaking lightly and breaking hard) so I figured I'd ask if anyone has any ideas before i go having the lower arms removed and new bushings installed along with new ball joints.

Thanks!

I have the same, its worn suspension mounts.