Hi, I just replaced my 2005 LR3 with a 2012 LR4 HSE, I find the LR4 is stiff when hits the bumps with dashboard noise and back seat rattlerattle compared to my old LR3 that drives very smooth. LR4 has new Pirelli tires, and 65,xxx miles. Any suggestions ? Thank you.

 

The two immediate things that occur to me are 1) tire pressure, and 2) worn lower control arms.

65K mileage would be in the general ballpark for LCA service. If you hear an audible "thunk" sound when going over speed bumps, or when braking hard while going 5-10 mph, you may need LCAs.

 

 

X1 ............ as stated, it could be worn suspension bushes or steering ball joints, does the steering wander on flat straight roads? It's a common problem with the LR3 and 4's. Tire pressures may be too hard also and oversized wheels on low profile tires do have an adverse impact. Also if anyone has stiffened the suspension shocks with alternatives.