I have a '97 Lexus ES300 with 112K miles on it. I have the adaptive variable suspension (AVS) that allows you to change the dampening of the suspension via a switch located in the center console area (next to the gear shifter). I have been getting a lot of 'thumping' noise when I go over even small bumps. In one of my previous visits to the mechanic, he had told me I may need to replace the struts and/or strut mounts.
Since I have the AVS, I believe replacing the electronic struts will be quite expensive. I don't really care for the adjustable suspension and would like to replace it with standard struts. Is this possible? If it is, then does the mechanic just have to replace them with regular struts, or is there more work involved in converting from AVS to standard? The mechanic I go to is a generic one who works on all types of cars and is not a lexus specialist, so I just want to understand what would need to be done before I go to him.
Also, could a bad strut mount cause a thumping noise? It feels as if there is something in the trunk that is bouncing, but it is infact coming from the suspension.
Your help is appreciated. Thanks, Mark