jsmuve7

This is why I enjoy getting on this forum..I have been telling my wife since we got this car that the seats should be more comfortable. Feels like I am sitting on a support crossbar or something. I will be taking it in to the dealer next week...TSB in hand.

joeyb

I had posted about the seats before, but didn't get much of a symatheic response from my dealer. Although my complaint was about the lack of support, yet the TSB says the complaint is "Too harsh" https://www.clublexus.com/forums/ls4...-too-soft.html

My problem is that I'm thin and was sinking into the rear/center section of the seat because I don't get any support from the side bolsters. I fixed it my self by cutting away the lower half of the foam and replacing it with high density foam used for motorcycle seats.

Since I've taken one apart, I can fill in some of the blanks. The seat uses a steel belly pan. There's a one piece foam cushion molded to fit the pan (no springs or coils). It's about 3" thick in the middle, but gets thinner at the back. If you're heavy, it's possible that you are completely compressing the foam at the back. jsmuve7, there is a steel crossbar in the cushion under the seam in the middle of the seat.

daryll40

I was very comfortable in my 2007 LS460 and the same in my 2009. I have, however, a ROCKY MOUNTAIN SHEEPSKIN on the driver's seat. This lambie is the greatest! Warm in the winter and cool in the summer. You sort of sink in but it's very supportive. Feels fabulous really. My father, who lives in Florida and also has a 2008 LS (had a 2007 last year) drove my car and couldn't believe how much better it felt with the skin.

JTS09

joeyb: I have the same issue. I'm 6'3", about 190 pounds and ergo on the slim side for my height. I feel like I'm sinking into a black hole (No pun intended, Black Leather Interior) and that there isn't adequate support in the center and rear of the bottom cushion . Really hope this helps. daryll40: Really wanted to put Sheep's on this ride, as I love them on my 2 GS's and other vehicles. Didn't want to defeat the Heated/ Cooled seat feature but I guess the Sheeps would be a lot more comfortable and neutralize the temp's anyhow, and prbably do a better job. Is that your experience? Thx, Jim

daryll40

Yes that is correct. On real cold days the heated seat mode still works fairly well, creating a warm lamb! I never much used the cooled seats even without the lambskin and you don't sweat with it anyway. It's worth a try.

joeyb

JST09, we are decribing the same thing. Motorcycle riders call this "monkey butt". If the TSB does not work out for you, I'll describe what I did. Any upholstery shop can do it. I've got 15,000 miles since I did it, and it's worked out just fine.

1. I ordered a 2" x 12" x 12" piece of multi-cell foam from www.sargentcycle.com
2. Leaving the leather cover on, turn the seat over.
3. From the middle of the air duct (middle of the seat) on back, cut out 1.5 - 2 inches of foam 12" wide. The metal rods under the seams should be almost visible.
4. Glue in the heavier foam with spray adhesive, and trim the back edge to the original contour.

I did all the work witha serrated kitcen knife. When it's done you are sitting on 1" of original foam with 2" of high density foam underneath. The side and center metal rods are now supported by the heavier foam - eliminating the bucket effect. No one who sits in my car can tell the difference.

If anyone has the TSB done, ask to see the new cushion before it's in. On the OEM seat, with the seat upside down on a table, you can push down with your thumb until you touch the table.

jsmuve7

Got the driver's seat cushion 're-padded' & passenger cushion replaced per the TSIB. (could not repad passenger side due to sensor in the seat for the airbag to be on or not) Can't say that there is a world of difference, but it is definitely better. I will know for sure when we take our first road trip.

LAMark

I mentioned to my dealer that the front seats were uncomfortable and they immediately suggested I have this done. Had it done today and it's a big improvement for me at least. It's a one-hour drive for me back home from the dealer. Normally after about 30 minutes the seat would feel lumpy and uncomfortable. Now it's better. I recommend this to anyone that thinks they need it.