16 IS200T strange engine noise! help!
Hello, my car is currently at around 12000 miles and since a few days ago, the engine has been giving off this loud, fan-like noise. Has anyone experienced this problem? In the video, all the sound is coming from the car at idle. No background sound is present. Until I take the car in, I would like to have some clues as to what is potentially wrong with it. I would appreciate any feedbacks!
https://youtu.be/dJ8J2SYQqQ8
https://youtu.be/PVU_S3_BXDE
https://youtu.be/dJ8J2SYQqQ8
https://youtu.be/PVU_S3_BXDE
I have exactly the same noise issue, and it is indeed the vacuum valve regulator is making that noise. It seems this particular part is not very reliable. I am currently waiting for my 2nd replacement of this part.
The first time I had it replaced was around 10,000 miles. Now at 15,000 miles, the new part is making the same noise again. I just brought the car to the dealer last week and I am currently waiting for the replacement

The first time I had it replaced was around 10,000 miles. Now at 15,000 miles, the new part is making the same noise again. I just brought the car to the dealer last week and I am currently waiting for the replacement

I just got my second replacement done. Lexus dealer had no issue replacing the part for the 2nd time since the car is still under warranty. However, the dealer did ask me to fill up a questionnaire to have my driving habits on file. It's not a big deal though. Lexus should worry about their part's reliability instead of their customer's driving habits.
I just got back from the dealership too complaining on the noise but they said is normal and didn't change any **** for me. Consider yourself lucky haha. In Canada we always get **** *** service from everyone !
Is this the same issue as the one found in this thread or do these deal with different defective parts? https://www.clublexus.com/forums/per...ost-issue.html
I just started hearing this buzzing noise from my car too and I'm right around 12k miles. Nobody in the other thread mentions hearing this noise but they do notice boost fluctuations on the boost gauge. Unfortunately I don't have the F sport package so I can't see what is going on with the boost in my car but the pulls do feel weaker to me.
I just started hearing this buzzing noise from my car too and I'm right around 12k miles. Nobody in the other thread mentions hearing this noise but they do notice boost fluctuations on the boost gauge. Unfortunately I don't have the F sport package so I can't see what is going on with the boost in my car but the pulls do feel weaker to me.
So I’ve noticed the same “humming” noise on my 16 IS200t fsport, 19k miles. I took it to the Lexus dealership last week and they advised that the sound was my turbo going bad. They’ve had it work a week but still can’t isolate the fault to the turbo because it’s not throwing up any codes. Just called them back to today after a long weekend and they basically told me the sound was normal for a turbo car. So I stated, it was normal, why didn’t the other is200t’s at the dealership make that sound. All the gave me was a ??? Look and I hope you enjoyed the loaner car.
Does anyone know how to replace the vacuum valve regulator? At this point, I’ll just change the part myself so I don’t have to deal with the stealership for this issue. Thanks in advance!
Does anyone know how to replace the vacuum valve regulator? At this point, I’ll just change the part myself so I don’t have to deal with the stealership for this issue. Thanks in advance!
So I’ve noticed the same “humming” noise on my 16 IS200t fsport, 19k miles. I took it to the Lexus dealership last week and they advised that the sound was my turbo going bad. They’ve had it work a week but still can’t isolate the fault to the turbo because it’s not throwing up any codes. Just called them back to today after a long weekend and they basically told me the sound was normal for a turbo car. So I stated, it was normal, why didn’t the other is200t’s at the dealership make that sound. All the gave me was a ??? Look and I hope you enjoyed the loaner car.
Does anyone know how to replace the vacuum valve regulator? At this point, I’ll just change the part myself so I don’t have to deal with the stealership for this issue. Thanks in advance!
Does anyone know how to replace the vacuum valve regulator? At this point, I’ll just change the part myself so I don’t have to deal with the stealership for this issue. Thanks in advance!
So I got the new regulator valve in yesterday. Howerver, does anyone know how to access the bolts? Looks like you have to get at it from the bottom. And it looks like it connected to another sensor that sits on top of it. I have the intake tube off and I still see no way to get it. Can anyone provide so insight?
I was having the same issue. Looks like it was the vacuum switching valve no 2 for me that was making that distinct tock sound. I unplugged and inspected it, didnt see anything physcailly wrong with it so I plugged it back and the tock was gone.
I hope Lexus has fixed this issue by 2018 models. but seeing how Lexus keeps installing the same part and still causing issues, it assures me that they haven't solved the problem with a brand new updated part.
I have a 2018 built dec 2017, hopefully i dont run into this issue. Currently have 5k miles
I have a 2018 built dec 2017, hopefully i dont run into this issue. Currently have 5k miles
I have an issue with my IS200T. As of late, there's been a hesitation to accelerate. The other day, car completely shut down, luckily i was just moving from a stop light and going into a gas station. Car lost power, I slowly pulled in and Check engine light came on. Added some gas, checked fluids, all seem fine.Also, I only put premium grade gasoline in this thing. Car currently has less than 28k miles so it's not like service is due either. Restart car and it drove normal but it still has been hesitating to accelerate. I will take it in this month for the 30k Mile service and report to the service people. I made sure i took a video with the check engine on.
Would not recommend this motor to anyone, just get an IS350. Luckily my lease ends next summer and with Lexus pull ahead program I should be out of this car in May.
Would not recommend this motor to anyone, just get an IS350. Luckily my lease ends next summer and with Lexus pull ahead program I should be out of this car in May.
[QUOTE=Sheddy;10211466]That dealership is clueless! I replaced them myself since i have a few modifications which i think the dealer would not be pleased with. I relocated mine near the oil dipstick for easy access if it goes again.
So where was the initial location of that valve?
So where was the initial location of that valve?





