Hesitation problem at various speeds (TSB info post #159)
#1561
We test drove a non F Sport 350 when we were considering our recent purchase. We were definitely disappointed with the different driving behavior, but then we had also driven the 450h first so that may have colored our expectations. We have also owned mostly hybrids for the past few years (since trading our 2013MY 350) so we have become accustomed to the unique qualities of the CVT transmissions. We definitely like the driving characteristics of the 450h better, but once again, every model has design compromises and that's why there are different drivetrains (and different tastes).
Do I still think the RX is a good SUV? Yes, but there has been huge room for improvement that Toyota/Lexus has failed in updating. I’m still puzzled at how different the transmission is in the GX vs. the RX. The GX is a wallowing, cumbersome SUV, but it’s smooth & quiet & the transmission doesn’t hunt. It gets terrible mpg, but it’s rock solid. I just can’t figure out Toyota’s thinking on their #1 selling Lexus vehicle. If Lexus fixed the hesitation problem, increased the towing/hauling capacity a little & added a small turbo to the 3.5 V-6, the RX would be #1 on my list again. It’s just hugely outdated now.
#1562
Is the new Highlander any better with the transmission?
#1563
Pole Position
Do I still think the RX is a good SUV? Yes, but there has been huge room for improvement that Toyota/Lexus has failed in updating. I’m still puzzled at how different the transmission is in the GX vs. the RX. The GX is a wallowing, cumbersome SUV, but it’s smooth & quiet & the transmission doesn’t hunt. It gets terrible mpg, but it’s rock solid. I just can’t figure out Toyota’s thinking on their #1 selling Lexus vehicle. If Lexus fixed the hesitation problem, increased the towing/hauling capacity a little & added a small turbo to the 3.5 V-6, the RX would be #1 on my list again. It’s just hugely outdated now.
#1564
Websurfer: Same transmission, and likely the same complaints. The ECU software, and drive by wire throttle, is not engineering at its best when trying to meet CAFE standards. Visit the Highlander forum and see if their having transmission/hesitation issues.
#1565
Looking at another forum for Highlander. Hesitation seems to be problem for a while. I see some posts from 2004 also. It's probably Toyota engineering thing.
#1566
2004 models are not relevant to this issue - That’s too far back. I don’t know what generation the Highlander is presently in, but the RX 350 is in the 4th generation.
#1567
Last edited by websurfer; 04-22-21 at 01:37 PM.
#1568
My 450h was in for service & they gave me a 2020 RX 350 for a loaner. This loaner had about 14,000 miles on it. I don’t know how Lexus can get away with such a garbage transmission! It was horrible to drive in the hill country. There’s no way in hell I would ever buy a 350!
I'm very happy with mine now, I'm the only driver, I know it well and can drive it extremely smoothly in all conditions, I know to use sports mode when in twisty, hilly terrain and occasionally use the paddles to go down a gear when you suddenly hit a very steep hill. Yes I know it should just all work without driver input like that but Lexus has this incessant need to get that fuel consumption figure down as it helps sales.
The actual transmission is extremely smooth, that is the mechanical side of it, when letting the car make the changes some are rough as it downchanges but every time you you use the paddles or kickdown it changes down gear syrupy smooth, it CAN do it it's just that bloody software that gets it wrong sometimes. Like I said many people are happy with it, they keep selling over 100,000 units in the US year after year so cannot be all bad.
#1569
The thing is not everyone feels the same, many people on here have said it works fine for them. A loaner is driven by a different driver each day so the ECU is constantly adjusting for different driving styles, yes ideally anyone should be able to get into a car, drive it and have the car perform the same for everyone. As has been said numerous times the ECU was designed with fuel economy in mind and most people will drive the RX gently, pottering along, getting to the speed limit with the traffic but not trying to beat the traffic. It's no performance machine that's for sure.
I'm very happy with mine now, I'm the only driver, I know it well and can drive it extremely smoothly in all conditions, I know to use sports mode when in twisty, hilly terrain and occasionally use the paddles to go down a gear when you suddenly hit a very steep hill. Yes I know it should just all work without driver input like that but Lexus has this incessant need to get that fuel consumption figure down as it helps sales.
The actual transmission is extremely smooth, that is the mechanical side of it, when letting the car make the changes some are rough as it downchanges but every time you you use the paddles or kickdown it changes down gear syrupy smooth, it CAN do it it's just that bloody software that gets it wrong sometimes. Like I said many people are happy with it, they keep selling over 100,000 units in the US year after year so cannot be all bad.
I'm very happy with mine now, I'm the only driver, I know it well and can drive it extremely smoothly in all conditions, I know to use sports mode when in twisty, hilly terrain and occasionally use the paddles to go down a gear when you suddenly hit a very steep hill. Yes I know it should just all work without driver input like that but Lexus has this incessant need to get that fuel consumption figure down as it helps sales.
The actual transmission is extremely smooth, that is the mechanical side of it, when letting the car make the changes some are rough as it downchanges but every time you you use the paddles or kickdown it changes down gear syrupy smooth, it CAN do it it's just that bloody software that gets it wrong sometimes. Like I said many people are happy with it, they keep selling over 100,000 units in the US year after year so cannot be all bad.
Also, the RX missed being an IIHS Top Safety Pick +, because of the crappy headlights! Why?? How freak’n hard was it to improve the headlights in order to achieve that rating? That’s a lot of vehicles that are being overlooked in just a few years, just because they don’t have excellent headlights. That’s important to most people at this price point.
#1570
My 450h was in for service & they gave me a 2020 RX 350 for a loaner. This loaner had about 14,000 miles on it. I don’t know how Lexus can get away with such a garbage transmission! It was horrible to drive in the hill country. There’s no way in hell I would ever buy a 350!
#1571
Sounds like you guys over there have poorly built Canadian RX's, we only get Japanese. Mine's very quiet, you can hear the engine under hard acceleration but that's part of Lexus's move to having more feel, more involvement with the car.
#1572
Every vehicle is different for every driver. My wife thinks her RX drives perfectly. Has no complaints at all. When I drive it I notice the occasional hesitation, but not all the time. We had 2014, 2016 and 2018 Highlanders. XLE, Limited and Platinum. Had no hesitation problems in any of those. My major complaint was the interior noise level in them.the RX solved that problem.
#1573
Every vehicle is different for every driver. My wife thinks her RX drives perfectly. Has no complaints at all. When I drive it I notice the occasional hesitation, but not all the time. We had 2014, 2016 and 2018 Highlanders. XLE, Limited and Platinum. Had no hesitation problems in any of those. My major complaint was the interior noise level in them.the RX solved that problem.
#1574
Instructor
all us north americans pretty much got screwed and im pretty sure ill never buy a non japanese made lexus ever again
I even wrote Lexus Canada a letter because i was so appalled by the lack of quality in this 4th gen RX
Dear Mr. X:
Thank you for your recent correspondence.
As the Canadian Lexus distributor, we always appreciate receiving guest feedback, even when it cannot be positive. This is the only way we can monitor our guests' satisfaction with the service provided by Lexus dealerships or the experience with one of our products.
We are very sorry to learn that your 2017 Lexus RX 350 has not met your expectations. We would like to mention that extensive planning and research are required in order to ensure the highest quality of components is used on our vehicles. However, it is difficult to establish the life expectancy of a component or predict when a failure will occur. There are many variables that will contribute to their durability. Our commitment to you is to repair your vehicle according to the terms of the Lexus new vehicle warranty.
Please be assured that Kaizen is the heart of the Lexus Production System. Like all mass-production systems, the Lexus process requires that all tasks, both human and mechanical, be very precisely defined and standardized to ensure maximum quality, eliminate waste and improve efficiency.
We would like to mention that at Lexus, our goal is to provide vehicles that will not only meet, but exceed our guests expectations in every reasonable way. Although we realize this is not always possible, we constantly monitor the comments we receive from our guests as it is through this medium that we can make changes, when necessary.
That being said, please be assured feedback such as yours, is highly valuable and we thank you for taking the time to share your concerns. A copy of your correspondence has been sent to the appropriate departments within Lexus Canada for their information and future consideration.
Again thank you for taking the time to write to us.
Sincerely,
Hiyem Zabian
Customer Assistance Centre
Lexus Canada
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
on 2021-04-21-13.00.53.000000, wrote:
Dear Lexus,
After owning 5 of your products through 20+ years, I want to inform you
that the newer 4th gen RX fit and finish is slipping. It is noticeable by
us owners. This is the 2nd time I'm bringing my 2017 RX into service for
remedies of squeaks and rattles. My older Lexus(s) never had these issues
even after 10+ years of ownership.
The 17' RX has numerous rattles and squeaks from the center console and
it's highly discussed on owners forums like Clublexus. Specifically, the
armrest is a known concern along with all the cheap plastics used in the
dash and doors.
https://www.clublexus.com/forums/rx-...mon-issue.html
My dealership has always treated me well and I'm sure they will try and
remedy the vehicle the best they can, but this isn't a dealership problem.
This is a quality issue with your products.
I don't know how many owners respond to you guys directly about your
products but I want you to know that we notice this sort of cost-cutting
and lack of attention to detail. Despite all the advertisements of Takumi
craftsmanship and kaizen processes, it's not readily evident in this newer
RX. In fact, I can clearly say this newer RX has significantly worse fit
and finish than my 2008 RX 400h. This "cheapening" of the Lexus brand is
something I'm worried about. As a loyal Toyota customer and having both my
immediate and extended family all owning Toyota products,
it's disheartening to see.
I don't expect anything from this email, I just want you guys to know what
us loyal owners are thinking.
Below are my current fleet of your cars. I neglected to include all the
Toyota products I've purchased throughout the years as well, but you get
the idea.
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#1575
Driver School Candidate
Join Date: Apr 2021
Location: MD
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I have same problem. I was taking exit ramp and trying to merge into traffic. My speed at this time is 40MPH. I am putting pressure on my gas pedal but it hesitates to,pick up speed and then suddenly picks up speed. the other drivers are coming at 70,MPH including trucks and i get scared as I am not able to change lane with increase speed. The service guy says they have not found any issue but there is an issue and Lexus must address this problem before some one gets killed. How many of you have same experience.