Many people on forums ask if KDSS is necessary and what is the difference. I test drove a couple 4Runners with/without KDSS and the contrast is staggering. I highly recommend you test drive both for an extended period of time and get on the highway. Go over a few speed bumps or choppy pavement and notice the way the 4Runner handles.
Body roll without KDSS is almost unbearable while turning in an intersection or making large degree turns. With KDSS, body roll is still there but it's under control and comfortable for daily driving. Highway driving is much more tight and its noticeable that KDSS is working on interchanges or going through cloverleaf loops. The tires don't squeal as much and it doesn't feel like tipping over at the speed limit.
Bad pavement choppiness and movement is minimized and doesn't beat you up. It's still a stiff and truck like ride with the 4Runner's body on frame and live rear axle, but it's more livable with KDSS. Unfortunately, the nosediving during breaking is still there with all suspension setups.
I test drove a 4Runner Limited with X-REAS for a short time and didn't notice any large differences with KDSS 4Runners.
There are some issues with KDSS:
- TRD Pro skid plate needs some fabrication to fit due to KDSS system
- If it breaks, it will be expensive to fix
- May not work with large lifts or suspension changes
- Some reports of clunking. I haven't had any clunking noises, but some creaking when going off-road. The creaking is probably normal while KDSS is operating.
- Some reports of leaning to one side.
If you are leasing a 4Runner, KDSS may not be a big deal. KDSS will improve trade-in and resale value because the option is uncommon at the dealerships in my area.
