The Nav screen actually turns completely white and the only thing that shows on it is the black triangular icon that shows where the car is located. I can also switch to CarPlay and use my apps on it. That tells me that my iPhone is communicating with the system correctly.

Note that the 2024 went down in two of six categories which equals 33%. I now know I either bought the wrong year model, got a lemon, or Lexus electronics quality is going down. I'm definitely getting rid of it now.

I had that recall performed at my second service last year. I bought the car in December 2023. I knew about it from this forum and asked my Service Advisor about it when I took it for my first service in May 2024. He advised against doing it at the time because he had a customer's car that had been sitting there for two weeks because if the recall didn't work exactly right it fried out an onboard computer and you couldn't drive the car. He wanted me to wait until my next service so Lexus could work the bugs out. I did and had no problems with the update........or is that what is causing the problems I am experiencing now?

I have other electrical issues too. One of the displays in my DIC (gas mileage) doesn't display correctly. If I get out of the car and accidentally brush my hand on the control where you program the seats when I am pushing the door open it immediately folds my seat up into a position that isn't even programmed into the system. I reprogrammed buttons 1 & 3 for the key fob I use every day and button 2 is programmed for my wife's key fob but it still does it. Her key fob is nowhere near my car when it does this.

I trusted the Lexus brand because I bought my wife a 2012 GX460 off the showroom floor in 2012 and she kept it for eight years with zero issues. I know people tend to point towards the German brands as having these problems but the 2014 MB E350 AMG I bought as a CPO in 2018 never had an issue in the four years that I owned it. The only reason I sold it was because the car market was booming and I could get about half of the depreciation out of it.

My Service Advisor was off when I picked up the car so I sent her an email describing what happened. My son-in-law was a Service Advisor at this dealership for several years and I used my current Service Advisor every time I took my wife's GX460 in for maintenance. Hopefully she will do something for me.

 

I took the car back out today and my iPhone wouldn’t connect without an error message and turning Bluetooth off and on the iPhone. Shortly after my drive started I noticed that the Nav screen was fading from the top down until it eventually went white except for the black icon that marked the car. I checked CarPlay and the Waze app worked. Luckily my wife was with me so she took pictures. I sent them to my Service Advisor and told her something needs to be replaced. It’s beyond me how a tech took it out on the road and it didn’t happen for him. It’s happened to me both times I’ve driven it since I picked it up.

 

The short drive a mechanic takes is very rarely long enough to show intermittent problems. That's why I mentioned earlier for there main teck (not mechanic) drive home, lunch, etc as in a reality drive and not a drive around the block. Generally they have to see the problems themselves but since you have a special relationship may take this more seriously.

 

Sucks you're still experiencing this with no fix seemingly in sight. it seems many car makers do not take the infotainment/computers seriously and it's a far far after thought.

also to the extent cars need computer updates, etc, you shouldn't need to drive it to the dealer for a guy to hook it up to a laptop like it's 2004. car makers need to get with the program with updates that happen while you sleep.

Hope you get it fixed bud. that would drive me nuts. let us know what your service advisor says to these pics you took.

 

Could this be heading into Lemon Law territory?

• Substantial Defect: The defect must significantly affect the vehicle's use, value, or safety.
• Warranty Coverage: The defect must be covered under the manufacturer's new vehicle warranty.
• Reasonable Repair Attempts: The manufacturer or its authorized dealer must have made a reasonable number of attempts to fix the problem.

 

As a last resort, I would try disconnecting the terminals from the battery posts for about 10 minutes then reattach the battery. Now start up the vehicle. Electronic Control Units will boot-straps themselves to a factory condition. Most likely you will lose your radio stations settings and any personalized settings like seat positions. Talk to your tech first about doing this and see what are their thoughts. This method frequently gets the electronic gremlins out on many makes of vehicles. ECUs are nothing more than specialized computers within the vehicle.

 

Does this cause the transmission to relearn it's shift points?

 

Exactly what I’m thinking about now. My problem is my experience with this dealership’s sales department. I got a deal on this car from their sister dealership in north Atlanta because my son in law was friends with the sales person. They don’t have to give me my full purchase price back plus I have a $1800 ceramic coating on it and $1500 invested in wheels. They lowballed me last fall on my wife’s 2020 Denali and I went across the street to a BMW dealership and bought a BMW X5. It’s got less than 15k on it. Any buyback they would lowball me.

 

According to their documentation the tech drove it for ten minutes. I drove it for about five minutes today when this problem occurred again.

 

This is one of the methods Corvette C8 owners use to reset the cache on those cars. I asked my Service Advisor about it and she told me that you can’t reset this model year Lexus.

 

Yes it will.

 

That is reassuring. Based on her reply I would disconnect the battery and try this method. According to her it shouldn’t cause any harm then. I think I would start taking my vehicle to another mechanic. Apparently she doesn’t understand how computers work.

 

Do what Vero said as even when the battery was replaced they probably substituted the voltage and if they didn't that could be the reason you thought the problem was fixed. Microprocessors sometimes need resetting. Remember the old desktop where you had to take out the button battery or short 2 terminals to reset cmos? Another point here though is that you should not have to do this. As for lemon law it is different in all states like here in NC it is virtually impossible.

 

Looking at the pictures it appears to be more software related (glitch) than a hardware fault as only the nav portion of the screen is not re-drawing; since CarPlay functions normally. Does anyone know whether map data is stored locally on the unit or if it's retrieved in real time via the DCM (signal related)? Documentation seems to mention DCM usage only for traffic and POI data. Maybe disabling those features might help rule out a DCM-related issue?

Have you or your dealer performed a full multimedia system reset (Settings / Info & Security / System reset)? It's a common step dealers take before moving to hardware diagnostics, but it's worth confirming. Also, are you using a VPN app on your phone?

If the issue appears within 10 minutes of driving, try disabling Bluetooth temporarily so the head unit doesn't pair with your phone. This could help determine if the glitch is linked to the phone or Bluetooth connection.

If pairing/phone is the cause, that could explain why the technician didn’t experience the issue; as no phone pairing was likely used during their infotainment navigation tests.

 

She's an 18 year Service Advisor. She knows these cars inside and out. My son-in-law, who worked at this dealership as a mechanic and was promoted to be a Service Advisor, is who recommend that I use her when I bought my wife's 2012 GX460. The closest Lexus dealer to me beside this one is the sister dealership about 1.5 hours from my house.

I do remember the old computers. I started working with them in 1982 on a Radio Shack TRS80. I had to program the hard drive every day with a cassette deck because it had no memory!

You are right about Lemon Laws........I don't think after some brief research that this car will qualify in Georgia.