My information is accurate. As I stated, two different people have replaced their 2009 suspension with 2010 components and both said it was worth the cost.
One is hazelwood7 who posted:
"...wanted to give a one month update after the upgrade to tell you if my original comments still stand. They still stand that but I would add that the bounciness/bumpiness of the ride has been improved closer to 80%. This is a must upgrade for those who have early 09 suspensions. It has made a major difference in the enjoyment of the car. I no longer desire to get rid of the car have been enjoying my time with the Genesis. This is the car they should have made from the beginning. I like firm riding cars but the upredictable nature of the early 09 suspension drove me nuts. The suspension in the 2010 is predictable and reliable to what will happen when a certain bump in the road or joint is driven over. This alone is worth the upgrade. The Genesis feels more "button down" and really shows with the upgraded parts when passengers are sitting in the back. The ride is much more compliant. I would also like to point out that before I did the suspension upgrade I compared my car with 2010. I could clearly bounce the backend of my car up and down by hand while the 2010 did not move. After the 2010 suspension upgrade I am happy to report that my car acts identical to the 2010 tester model and the rear end can't be bounced by hand. I would not hesitate to recommend this upgrade. It is a must for those with early 09 cars."
http://www.genesisowners.com/hyundai-genesis-forum/showpost.php?p=52032&postcount=24
The other person known to have swapped out the 2009 suspension parts with 2010 upgrades is genesis45 who posted this after making the change:
There are others (including myself) who have an early 2009 and compared it to the 2010 have noticed the difference.
Although there are some who claim to not have noticed any difference between the 2009 and 2010 suspensions, there are a couple of things to consider:
- Hyundai made mid-year changes to improve the 2009 suspension (4/21/09 build date). Most people who compared the 2009 and 2010 where probably comparing the revised 2009 models with the 2010 (and not the early 2009).
- It has been been confirmed by many sources (including a Hyundai Tech who posts on this forum) that mid-year 2009 suspension changes were made , and additional suspension changes were made for 2010. Other sources, such as Hyundai employees on Hyundai Think Tank website have confirmed this (as well as obvious part number changes). It would be absurd to think that Hyundai went to the trouble to change these suspension parts if there was no improvement.