Looks very much like a generic letter. They are not moving forward at this time, purely saying they will look into it and see if there's a valid claim.
I doubt it, these battery issues are popping up on many brands not just Lexus.

 

Yeh,

You are right. I got this after I send in additional info. Our office is investigating this matter a bit further for a potential class action matter. We may reach out later this week to discuss your experience.



Do you have availability this week to discuss your experience with your vehicle more in depth?

 

This is a USA class action suit. What can Canadian owners do?

 

We just dropped off our TX for PPF and our installer was very aware of RX/TX drained battery issues so much so that he purposely bought battery tenders which he installs on every Lexus hybrid while he's working on them as he had 2 RX die with the doors closed and didn't want that happening again. I put an ecoflow delta 2 max with a CTEK battery tender in the trunk before we dropped it off and he noticed it and called us. He said ours is the first he won't plug in lol.

 

They need to go into the details to make a water-tight prosecutable legal case, such that Lexus will then either have to justify the problem as a "feature" to a judge/jury (which they won't be able to), or fix it, or settle the case with monetary compensation to the Class.

So the more details the firm gets and the more reports they get, the better.

 

Well hate to say it but I too have now suffered from the dreaded dead battery issue. Happened to me twice, once in December and again a few weeks ago.

December I think was probably partially my fault, I had it in the garage doing some cleaning as well as letting a bunch of the snow/ice melt off of it so I had the hood open and the doors unlocked. Go to start it and nothing. Thankfully I was able to get it powered up again in short order with a battery booster and it ran, charged, etc so I thought nothing of it.

Recently though we had a pretty bad cold snap and I left the vehicle outside as the garage was in use (shared household) and when I went out again to start it there was JUST enough juice left to open the doors but everything else was no bueno. Dealer covered the battery under warranty so that was great but now I'm heavily considering getting a trickle charger installed for peace of mind, especially if I go away on vacation somewhere and leave it sitting for longer then I normally would at the airport.

 

Sorry to hear you too are a victim.

A trickle charger won't help you much at an airport unless there is an outlet nearby. Get a battery booster, I have a NOCO. Keep it charged and in your centre console. That way wherever you are you can boost yourself.

 

Keeping the battery fully charged will indeed help keep the battery from dying when the vehicle is not used for an extended time, even if it is not plugged into the charger during that time.

That said, a better solution for extended non-use away from AC power would be to use a solar charger, assuming the vehicle is parked in the open.

I've been using this one in a vehicle that sees less use than ideal.

https://a.co/d/07OE86Ya

 

Does this work plugged in to the 12v accessory outlet?

 

Not for the RX. The outlets are turned off when the vehicle is off.

I use the included OBD2 connector, plugged into the OBD2 port, which is always live.

 

Thanks for that info, as I park outside at work this is a great option. Currently 50% off Amazon Canada. Cheers.

 

hmm, is that safe, have you confirmed the battery is actually charging?

 

yes and yes.

The OBD2 port 12v is always active. You don't want to go past 3 amps with an OBD2 connector, but this is a bit over 2 amps max.

The three "humps" the arrows point two were when the sun was hitting the charger in my GR Corolla, which uses the same battery as the RX450h+.



This is in my Ford Focus, which has a 6-year-old battery.

 

Add me to the list of those victimized by this apparent design flaw by Lexus. My 2026 RX350h (purchased new in mid-November with ~2,000 miles) began exhibiting symptoms late last week. Weird malfunction messages and attendant alert sounds began being displayed. I initially correlated it to my radar detector which was being powered by the 12V power outlet (cigarette lighter). I was able to resolve by shutting down the car and then, upon restarting, the messages stopped. This morning, however, the messages and warnings began upon start up. I drove for nearly 90 minutes with a non-stop rotation of what seemed to be every possible malfunction message that could be broadcast (Braking Power Low/Shift System Malfunction/Power Steering Malfunction/Braking System Malfunction/Air Bag Malfunction/etc., etc.). In addition, every warning light was illuminated and/or blinking. Cruise Control and Climate Control were disabled. Basically I could drive the car and that's it.

I let that car sit for around six hours and, upon restarting, the same series of incessant malfunction messages and warning lights/alerts started up and continued for the 90 minutes back to my home.

I have an appointment with the dealer tomorrow and they've indicated that replacing the 12V battery- like for like (not an AGM) is all they can do as "their hands are tied due to Lexus corporate". So, root cause is known and they are most likely going to replace the culprit with the same battery. How long until this again manifests? As I've read through this thread I've grown more and more disappointed with the OEM in how they have responded (or not) to this significant problem (potential safety issue) and the fact I believed all the information concerning legendary Lexus reliability and durability.

 

QUOTE=HH350h;12055714]Add me to the list of those victimized by this apparent design flaw by Lexus. My 2026 RX350h (purchased new in mid-November with ~2,000 miles) [/QUOTE]

Not defending Lexus but… you’re driving less than 400 miles a month, so I assume the car sits undriven for long periods of time. Or you drive only very short trips, not allowing enough driving time to keep the battery charged. It seems like most people having this problem just don’t drive the car much. Our car consistently is driven about 1000 miles a month. We have never had any battery issue at all. And none of the bells and lights symptoms you’ve experienced.

Are there any activities with which you contribute to running down the battery? Like cleaning out the car and leaving the doors open for long periods? Keeping your key fob near the car so that car is constantly communicating with it?

You might try locking the car, even in the garage. That’s suppose to shut down systems that would otherwise be on alert all the time, consuming battery resources.
And I highly recommend a battery maintener/trickle charger be hooked up every week or two for several hours.

We shouldn’t have to do any of this stuff, but, knowing the problem, we can do something about it.