Contact the Toyota Regional Rep and get another dealer to look at it.
Document everything you do and who you talk to.

 

Thanks sdspeed! Will do, just unfortunate you have to. How can I find the Toyota Reginal Rep? Google it? or call Toyota main office or something.

 

I agree. I'd call and ask to talk to the General Manager of the Dealership you've been dealing with and express your concerns. Civility is your friend. Explain to him how difficult it is to run back and forth and express that one big reason why you picked a Toyota was for that assist feature for the added level of safety etc. Take names and notes.
If that fails to get some satisfaction then contact Toyota thru one of the options listed on the site below.

I like well thought out emails that I can refine several times before sending them since I tend to get irrated and says things that don't help my case or explain clearly the issue and it gives me a paper trail. Thats me.
I'm optimistic that the GM of your dealer will come thru.

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PS
Can you have someone sit behind you and video what the cars does when the assist is on and you let it wander and don't correct it. You or your helper can narrate too. I'm sure there's a stretch of empty Texas road you can safely demonstrate that on. Just be sure and not esceed any speed limits etc. that the video may see. Just an idea.

 

Mine will "assist" the steering wheel back to the center but not enough to self drive the car in it's lane. All I feel is a slight nudge on the steering wheel.

 

As does mine and will only work if lane change lever is not in use--

 

It will not keep you from running off the road but when you cross the centerline or the sideline you should feel a little nudge on the steering wheel make sure you have lane departure turned on

 

Nope, I get no nudge at all. I've got a 2020 Highlander and also had a 2018, I know what the "nudge" is, this vehicle does nothing.
Thanks for your insite

 

Have you tried setting the sensitivity to maximum?

 

Yes I have but thanks for the suggestion. I am very familiar with the settings/adjustments since I have owned a 2020 Highlander Platinum for over a year.

 

So its turned on in the MID and you pressed the LDA button on the steering wheel which makes the lane lines appear on the MID. The lanes are solid and you are driving over 32mph. It still doesn't nudge you to the left or right once it detects that the car is going over the lane lines? hmmm, you'll have to go through toyota corporate or go to another dealer.

 

Yes what you describe is accurate and I'm afraid of this journey continuing down the Corp road but I don't know what else to do. Can't believe this dealer doesn't understand how the LDA is supposed to function. As I've stated previously, I have a 2020 Highlander and the LDA system functions flawlessly so I'm very familiar with how it Supposed to function. Thanks Keith

 

Weird. Unlike the 2020 Highlander, the avalon won't keep you in the center of the lane, it'll just nudge you to the right or left but you have to control the steering wheel.

Next time you go to the dealer, ask to drive another 2021 avalon and test to see if that one will work.

 

Challenge the actual service manager to take the ride with you in a similar vehicle, in which you can show the expected behavior that yours does not do. If s(he) refuses, include in your discussion with the mothership.

 

Or maybe try another dealer in the area? Looks like Universal in San Antonio is about 20 minutes away.

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If you are expecting Level-2 driving assist you are going to be disappointed.

Drove 100 miles on interstates today. Could have taken the Avalon with its higher MPG and TSS 2.5 or a '19 Rav4 with lower MPG and TSS 2.0 with but driver assist. Similar trim levels (Limiteds) and with all packages on both. Took the Rav4 because it makes for easy driving on well marked roads with it doing the steering to keep the car within a lane. You have to have your hand on the wheel and eyes on the road but for a long drive it makes the concentration a bit easier.

Seems sometime in the last few years Toyota decided to omit that feature on Toyotas no matter that they may list for $46k and only provide it on the Lexus brand.

 

Went to another dealer, AutoNation, Corpus Christi, and they reset and calibrated the LDA system, all good now.
Thanks Everyone!
The dealer in San Antonio, Alamo, didn't even know how the steer assist part of the LDA system was supposed to work and keep telling me everything was working properly. Pretty sad...

 

I would let them know how ignorant they are

 

I would let dealership owner/ GM know how ignorant and condescending their service dept (including service manager?) is. They likely care about not ticking off customers with arrogance, 'cause it's their money.