Got some clips! The gauge has never behaved like that, unless I just haven't noticed before.
clip 1
clip 2

 

Hmm turns yellow thats weird... i havent went full throttle in mine yet because breaking it in. What does it normally do under full boost?

 

20 months I own the NX 200t, this is normal guys.

 

Yup it is normal, since there is no performance issue.

 

Good that's a relief!

 

Update: Got the car back later that evening. They said they did a bunch of other steps and tests before they got to this solution. But the service sheets say they replaced the "boost regulator". I'm guessing this is Lexus' generic term for the wastegate. They stated the cause for the issue was the 'Boost Regulator Sticking'.

This is the part # from my service order in case anyone else experiences this. LEX 25819-0W010 Description *Valve, Vacuum R-SPO

Seems to be working fine now.

(F-Sport Folks only) BTW, for some of the other comments about the gauges and such. You can play with some of the "redline" indicators through the Driver Settings. I have my High Speed Indicator one set to 88 MPH so I know at what point I'm ready for time travel. But you can play with a lot of these indicators and setting like the needle color just sitting with the car parked for a little while and playing around. Yes, the boost gauge does turn an orange color when you really punch it or get up around 15 PSI. The tach should also get a red ring when you really get on it. That's normal.

 

#8. $100 part. So in the future if this happens, at least it's not a catastrophic cost out of warranty

 

Yeah, luckily mine was all warranty. The invoice was for $399.00 total to replace the part.

 

It finally happened to me ..... BOOST regulator went out I took it to the dealership today and the tech went for a test drive with me and said oh **** when it started happening but I just wanted to comment and thank you guys for posting this thread ,because it helped tremendously he was even very thankful because you guys posted the part number That he needed to order so basically it's saved a lot of time I love this forum thanks guys my cars getting fixed right now .... But in the meantime as a loaner I'm driving a 2017 ES its pretty nice

 

Same is happening to me on my IS200t. Going to take this to the dealership tomorrow and let you know what they say.
Thank you for giving me some information to go in with so I don't sound like a complete idiot trying to explain to my service adviser.

 

My IS200t is approaching 1,000 miles. So far so good. I'd hope--it's a Lexus! lol.

really hoping I can trust this car long term.

There's first-generation 335 turbos pushing 1,000 hp to the wheels out there on stock internals. my friend has one pushing 500 rwhp. a wall of torque just drops on you. its fast. and reliable. 100k+ miles. I hope this engine can be as half reliable.

 

Started having the same issue as well, going to take it to the dealership and see what they can do about it.

 

my rc200t has been having no problems of the such. its a 2016. with 19k miles that i have added on this year. and honestly have been driving it kinda hard only AFTER its been warmed up. soooo sucks for y'all.

 

Thanks for all the advice and posts on this issue I started having this issue with my car took it to the dealer and having all this information that you guys have posted really helped including the part number that they needed to order LOL it took them a couple weeks to get the part in but they replaced it and now my car is working perfectly fine

 

This is the issue I am experiencing.