I managed to get the Spokane service center to order and then the Portland service center to install the "comfort" suspension in my March 2021-build Model Y LR (~33k miles on odo). Car is under warranty and I paid out of pocket.
Original/former suspension parts:
- 1188368-00-F
- 1188363-00-F
- 1188474-00-B (x2)
- 1188463-00-D (x2)
Newly installed comfort suspension parts:
- 1188368-00-H "DAMPER ASSEMBLY COIL E3 - DUAL MOTOR - FRONT RIGHT HAND"
- 1188363-00-H "DAMPER ASSEMBLY COIL E3 - DUAL MOTOR - FRONT LEFT HAND"
- 1188474-00-C (x2) "SPRING, REAR, COIL"
- 1188463-00-E (x2) "DAMPER ASSEMBLY COIL - REAR WHEEL DRIVE - REAR"
- two nuts -- (1111145-00-A)
Even with multiple attempts, Portland service center and messaging on the phone app would not order the parts for me. In contrast, Spokane's service center asked no questions and ordered right away. Even then, the initial parts that arrived were not the part numbers I specifically ordered -- they automatically changed my order to "the ones that fit my car" which were earlier part revisions. I had to push a number of times for the exact parts I ordered. Once firmly corrected, the parts showed up in 2 weeks.
When the order arrived for pickup I simply asked a price for the install. There was no pushback from the service center for installing parts unrelated to warranty.
Parts cost was $837.22
Labor cost was $365.40
and no sales tax in Oregon
The original suspension was my biggest complaint about the car. It was too crashy and unforgiving on rough roads. I would tell my friends it was "unrefined" for a car at the price point. But I didn't want to spend what looked like $2.5k-$4k on a 3rd party suspension. But $1k+ for just a slightly more comfortable suspension felt worth it. They are Tesla parts installed by Tesla, so I assume they are under warranty. I believe OEM would be preferable for a buyer if I decide to sell the car -- I can list it as unmodified.
My unscientific review: the "comfort" suspension feels ~10-15% less crashy/bouncy/harsh over larger bumps and potholes. The rebound always felt too strong and too "fast" on the original suspension. It was jarring. The updated parts are just slightly less reactive after hitting a larger bump. They smooth things out just enough without changing the overall feel of the car. Smaller bumps are slightly smoother but the biggest difference is larger bumps and imperfections. The new parts are not a major upgrade. Generally the car feels the same except I don't dread getting punched by the stiffness of the suspension on rough roads. I have yet to take the new suspension on gravel "washboard"-style roads, however I expect the ride will be very improved over the former suspension. Especially with 18" wheels and taller sidewalls (versus the OEM 19" Geminis), the ride is much more comfortable and improved.
Thanks to everyone on this forum and Reddit for the information on these parts. Cheers.
And if anyone wants the old parts... please take them.