Originally Posted by J123rx350

As GSFRX350 mentioned later in gen 4 they started installing a damper again ? Mine is a 2021 and it does not appear to have any dampener installed ? Like GS4_Fiend it's a flaw in the design. It is just disappointing that Lexus produces a car with this flaw. I was on the fence buying a new car between the rx350 and the Acura MDX. Next time I will be more careful.
Damn I wish I bought the mdx...
i real appreciate all of the comments each individual posts. You are a bunch of really nice people...thank, John

Originally Posted by J123rx350

As GSFRX350 mentioned later in gen 4 they started installing a damper again ? Mine is a 2021 and it does not appear to have any dampener installed ? Like GS4_Fiend it's a flaw in the design. It is just disappointing that Lexus produces a car with this flaw. I was on the fence buying a new car between the rx350 and the Acura MDX. Next time I will be more careful.
Damn I wish I bought the mdx...
i real appreciate all of the comments each individual posts. You are a bunch of really nice people...thank, John

Originally Posted by GS4_Fiend

There is no TSB for the 2020-2022 that I am aware of. Care to share?

You are correct. The engine mounts have been changed to the subframe which is why we feel the vibration in gear at idle. Although it helps the engine to be more ridgid on turns, but the side effect is vibration.

I was planning to add the dampers, but I am still undecided.

Originally Posted by OReliable

Here’s a little update for those following along.

Finally managed to get the car looked at again 25 days later after starting the case with corporate Lexus.
Case manager and service manager helped schedule a drive with the shop foreman. I explained to him the droning and the vibrations I was feeling in the car. I also showed him how the car begins to vibrate while revving the car in drive. With the shop foreman driving, we went on a 10minute drive around the dealership listening for the droning sounds. He acknowledged that there is a drone, but also added that it is a “characteristic” of the car. He said that they would do a health check, look at the car and scan the car for any issues. I knew the moment he said that, that the droning was not going to get fixed. When we got back to the dealership, I asked if I could test drive another 2022 Rx350 fsport. Luckily (or unluckily, you’ll understand in a minute) they happened to have one sitting in the front with 35 miles of the odometer. The moment I start driving the car, I could already tell that the droning was present. We take the same route along the highway and believe it or not, this car’s droning was worse than mine! It had droning at 20mph, 40mph, and 60mph @ 1500 rpm!

I’m not sure where they are getting their exhaust parts or who’s installing them, but maybe they need to have someone QC these things before it leaves the factory.

So I leave the car at the dealership for them to do their health check and they give me a ‘22 RX350 loaner for the rest of the day. The loaner has a little bit of droning, but not enough for me to complain about. I would say that it’s about a 70% reduction in the droning vibration as I barely felt it in the wheel or the cabin. I would it’s like a 3/10 if I had to rate it.

I get a call about 2 hours later from the service advisor that my car is ready for pickup and that there wasn’t anything wrong with the car when they scanned for errors and looked underneath the car. They checked for loose hangers and the exhaust pipe but everything was tight according to them. I asked the service advisor how I should proceed with this case since I’m still not satisfied with how the car is driving. I also asked if it’s possible to get a car that doesn’t drone or something like that. He told me that I should speak with the salesperson and see what they can do since that falls under the sales department. Luckily, one of the reps I spoke to at the dealership when I bought my car was still at his desk. I explained to him the whole story and how I had to open a case with corporate about it. I told him how I wasn’t satisfied with the way the car is driving and that it wasn’t how I had imagined the car to be at all. He said he would talk to the service manager and the higher ups tomorrow morning to see what they can do. I thanked him for his time and drove back home in misery as the car droned the entire way back. Just to put into perspective on how bad my droning is, imagine you’re driving on some very fine rumble strips every time you get accelerate for an entire hour. I feel sick to my stomach (almost a pre-puke sensation) as I drive this car. I scheduled another appointment at a different Lexus dealership for this Saturday to see if a different set of eyes and ears can fix this (perhaps a version of Hoovie’s car wizard).

I almost at a breaking point where I’m looking at lemon laws to see if they can salvage this situation.

Originally Posted by J123rx350

As GSFRX350 mentioned later in gen 4 they started installing a damper again ? Mine is a 2021 and it does not appear to have any dampener installed ? Like GS4_Fiend it's a flaw in the design. It is just disappointing that Lexus produces a car with this flaw. I was on the fence buying a new car between the rx350 and the Acura MDX. Next time I will be more careful.
Damn I wish I bought the mdx...
i real appreciate all of the comments each individual posts. You are a bunch of really nice people...thank, John

Originally Posted by alan2955

my 2022 did not have a damper from the factory either. But Lexus changed out to one with a damper. Little to no improvement. I also added a couple dampers myself with absolutely no improvement. I’ve had the car in Florida the last couple of months and had it’s 5000 mile service at JM Lexus near Fort Lauderdale. They are quite familiar with our complaint and the service writer’s comment was ‘it’s a darn shame’. Numerous complaints about it, and Lexus has no solution. Completely shameful for a $60,000 automobile. I’ve been tolerating this thing for six months but it’s still grates on my nerves. A friend was down here to visit with a 2022 Highlander, and the difference is just astounding how much smoother and more refined it sounds than my Lexus. Shame on Lexus!

Originally Posted by GS4_Fiend

I also wonder why the Highlander does not have this problem. Same engine, same transmission.

Originally Posted by GSFRX350

Where is the Highlander manufactured?

Originally Posted by GSFRX350

Where is the Highlander manufactured?

Originally Posted by GSFRX350

Where is the Highlander manufactured?

Originally Posted by GS4_Fiend

I also wonder why the Highlander does not have this problem. Same engine, same transmission.

Originally Posted by J123rx350

Not sure if anyone else has experienced the variation in the vibration ? I would guess approximately 25% of the time, maybe a little less the vibration is not present ? I look at the idle, outside temperature etc... I don't understand why I see this variation.
Does anyone observe this ?

Originally Posted by jmbj

I just purchased a 2017 RX350. Tne engine noise is much louder than my old 2014 RX. Also tne parking assist senors are sooo much less effective. Are these noticeable year differences or did I get a dud?