Hesitation problem at various speeds (TSB info post #159)
Driver School Candidate
Joined: Jul 2020
Posts: 1
Likes: 0
From: FL
I'm new to this forum. I have a 2017 RX350 with the same downshift clunk problem when I slow down for a light. It also jerks when I accelerate sometimes at highway speeds. The dealer tells me there are no service bulletins to fix this. Does anyone have further information on this issue?
Intermediate
Joined: Apr 2013
Posts: 390
Likes: 45
From: TN
I'm new to this forum. I have a 2017 RX350 with the same downshift clunk problem when I slow down for a light. It also jerks when I accelerate sometimes at highway speeds. The dealer tells me there are no service bulletins to fix this. Does anyone have further information on this issue?
The TSB number is upthread. Once it's done make sure that the tech disconnects the battery to reset everything.
Driver
Joined: Jul 2015
Posts: 126
Likes: 10
From: Toronto, Ontario
For those in Canada is the dealer applying L-SB-0032-19_Rev for you?
I contacted my local dealer in the Toronto area and he told me L-SB-0032-19_Rev is for US vehicles only. I'm dropping off my car later this week so they can "hook it up to the computer to see if anything can be applied".
I contacted my local dealer in the Toronto area and he told me L-SB-0032-19_Rev is for US vehicles only. I'm dropping off my car later this week so they can "hook it up to the computer to see if anything can be applied".
Driver
Joined: Jul 2020
Posts: 132
Likes: 62
From: Toronto, Canada
Doesn't the TSB fall under the powertrain warranty since it affects the transmission? In that case, you're looking at 72 months or 110,000km from the in-service date, whichever comes first.
Pit Crew
Joined: Jul 2012
Posts: 184
Likes: 23
From: Ontario
I'm not really sure why they made the transmission behave this way on a premium car. It's the only thing I don't like about this car, the off the line slow take off. Our 2nd get RX has a much smoother, and predictable, low speed take off.
Driver
Joined: Apr 2019
Posts: 90
Likes: 32
From: PA
I had Erin Park Lexus do it, did it improve anything? Maybe it's a little better in normal mode but it's still not smooth as it should be.
I'm not really sure why they made the transmission behave this way on a premium car. It's the only thing I don't like about this car, the off the line slow take off. Our 2nd get RX has a much smoother, and predictable, low speed take off.
I'm not really sure why they made the transmission behave this way on a premium car. It's the only thing I don't like about this car, the off the line slow take off. Our 2nd get RX has a much smoother, and predictable, low speed take off.
It made a huge difference and it shifts way more smoothly now. I don't know why that reset was not done the first time.
Pit Crew
Joined: Sep 2015
Posts: 116
Likes: 10
From: NS
I checked mine and its show L43 for a 2019. I had one done last Fall, so I am wondering if this is the same or this is a newer one.
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Driver School Candidate
Joined: May 2020
Posts: 1
Likes: 2
From: FL
Problem solved
Three days ago I filled my 2020 RX350 with premium (91 octane) gas. I have about 2500 miles on the vehicle and have used only regular (87 octane) fuel to this point. There is a HUGE improvement in the smoothness and general responsiveness of the engine. I had tried using sport mode to improve the sluggishness, which helped somewhat. But now, I am delighted that by changing to premium I can run in normal mode and it’s like a different vehicle. I highly recommend that anyone having this issue should try this simple solution - it may be a few more cents at the pump, but it’s definitely worth it.
Pit Crew
Joined: Jan 2003
Posts: 185
Likes: 14
From: mo
Hesitation issue totally fixed ....
My 2018 RX350 with 18,000 miles was experiencing really bad hesitations and surge. It got worse and worse as the vehicle got older and more miles. The local Lexus dealer just replaced the defective fuel pump (factory recall) a week ago and it was like magic. The hesitation and surge totally disappeared. Let's hope there's no more problem.
Driver School Candidate
Joined: Mar 2020
Posts: 15
Likes: 1
From: New York
My 2018 RX350 with 18,000 miles was experiencing really bad hesitations and surge. It got worse and worse as the vehicle got older and more miles. The local Lexus dealer just replaced the defective fuel pump (factory recall) a week ago and it was like magic. The hesitation and surge totally disappeared. Let's hope there's no more problem.
