2025 Tundra Engine is down!

So what do you believe the issue plaguing the V35A-FTS (Type '21) is?

 

A design flaw. And you can pass along that with a billion dollar budget, I’ll personally hire an engineering team to design a proper V8 truck motor that can be assembled in Alabama using existing facilities. I’m gonna take a $100 million dollar cut for myself but I promise this motor will meet current EPA regs and will be every bit as reliable as the 5.7.

And you truly believe that Toyota engineers have been unable to remedy sloppy manufacturing processes in BOTH of their billion dollar plus engine plants in Alabama and Japan for the last 7 years? Come on guys. Lol

 

What specifically about the design is flawed?

 

What is the design flaw you keep referencing? I mean, anyone can say design flaw, but without some specifics, it's just fake news.

 

"Design flaw" = "I have no idea what I'm talking about because I don't have any actual (and factual) information to contribute but I'm still pissy so I'll just say Toyota doesn't know how to design and build engines."

 

my best working theory would be:


Crank main bearings to cylinder count ratio (4 mains for 6 cylinders) in a high powered boosted application with a cradle type main support vs individual main caps. Inline 6 would have been a better solution. Just not as portable across vehicle designs due to length.

 

Also, how does the Godzilla motor do it and Toyota can’t figure it out?

 

So to summarize you went with GM who 3 times closed investigations on the 6.2 engine failures before finally admitting they were manufacturing defective engines and even now will inspect each engine and either replace or repair it and change the oil viscosity as part of the fix?

You don't think that qualifies as a train wreck for nearly 700,000 affected owners of that crappy engine?

This is on top of the second major recall for some of GM’s most popular SUV and pickup models, including for the 2020-2022 Silverado 1500 and GMC Sierra 1500. In 2023 GM issued a recall for up to 462,000 trucks and SUVs for transmission control valves that are susceptible to excess wear over time, resulting in harsh shifting or rear-wheel lock up while driving in rare cases.

I get you may dislike how Toyota handled their engine recall but at least they didn't close 3 separate investigations of the engine and then what do you know, when the NHTSA finds a defect GM announces a voluntary recall.

Toyota is replacing engines, what has GM done for 700,000 customers? Same as Hyundai, let me inspect your engine and put a patch on it and send you down the road!

Seems to be a clear winner in how to take care of your customers to me and it's not GM

 

3.4 has been in the lx500 for what 7-8 years now, and doing just fine. Gx550 has the exact same motor as the tundras and no recalls or engine failures and that platform is sold world wide. It’s not a “ design flaw”. If it was they wouldn’t have used it, they ain’t that stupid.

 

Damn, the Toyota PR team is out in full force today defending the indefensible as the 2025s start dropping.

OK Toyota PR: tell me what exactly is wrong with the manufacturing process that results in debris grenading these motors for the last 7 years? What is it they can’t or won’t fix in their billion dollar factories? And then please tell me why the problem hasn’t been fixed in 7 years, despite 4 public statements released BY YOU GUYS, assuring us that the issue was resolved, since 2018? Come on.

And as I said, please pass along to your bosses that for a budget of one billion dollars, I’ll put together a group of engineers that will design a proper V8 that is every bit as reliable as the 5.7 and meets current EPA regs. And the design will be done in less 18 months. If I don’t meet the 18 month window, or if the motor is a failure like the 3.4TT, I won’t pay myself a penny. They can PM me right here.

 

A quick google search shows that the Lexus with the same engine are having the same problems as the Tundra .

 

Better check in to that. The 2018 LS500 was the first to experience the bearing failures. The flagship LX has the same issue. As for the new GX, check where the motors for the Tundras and GX are sourced: same factories, same parts, same line, same tooling, etc. One 3.4 is just as susceptible to the failure as the next, whether is was made in Alabama or Japan.

So yeah, Toyota PR wants us to believe that two factories have had the same quality control issue for 7 years and counting and despite 4 promised “fixes”, the firing the QC manager and a billion dollar recall they’re still training the workers on how to properly flush machining debris out because I’m sure those processes aren’t robotic I’m sorry, it’s all laughable: the excuses, the responses here, all of it. And seriously don’t mention the new bearing part numbers that were quietly released in 2023… because that doesn’t fit the narrative they’re pushing.

 

@WNY PAT Still waiting for the details of your stated design flaw.

How do you know the quality manager was fired directly due to Tundra issues?

 

The effected numbers are relatively low compared to the number of trucks produced. I have a 23 Hybrid and have ZERO issues from when I took delivery in March of 23 to today. I have roughly 29k miles at this point and it has been trouble free miles. So, your design flaw theory is not TRUE and CORRECT.

 

I’m waiting for Toyota PR (ie you guys) to tell me what exactly is going wrong in the factories that results in Toyota being unable produce a 3.4 motor without contamination from matching debris in two separate billion dollar factories over the course of 7 years. Once you guys tell me how you’ve screwed the pooch on this for 7 years, I’ll tell you what I believe to be wrong with the 3.4 design.

 

the numbers reflect a 1-5 percent failure rate of the 3.4 liter motor. Your design theory failure is a joke, period.

 

OK, I've been profiled. Sorry, your wrong. I paid good money for my truck and end up knowing there is a history of fails - and toyota is ignoring hybrids. I'm not a happy owner.

You continually state design flaw yet have nothing to back it up. When asked, you blame toyota for not telling you what you perceive as the truth. In other words, you have a keyboard and that's about it.

 

What makes you an unhappy owner? Worry over engine failure or that the Hybrid's were not on the on the recall list.

 

Manufacturing debris in the engine or design flaw, safe bet that all of your "replacement engines" are just as susceptible as the 2025 trucks are.
I just bought my 2025 well aware of the issue ... but every other full size truck mfg is having issues as well. I'll take my chances with the Toyota.

 

Love how all these 2nd genners are quick to hop on here and trash talk the 3rd gen when most haven’t even owned or driven the new powertrain. All I know is, I’ve got a 10 year / 125k mile year BTB zero deductible warranty. I feel much better going with Toyota than the other manufacturers as Toyota takes much better care of its customers. 2nd genners, keep getting your panties in a bunch, it makes my day more amusing!

 

Ahh the “quick google search” keyboard warriors. I will immediately take your word for it and believe everything you say. After all, you own a Ram….

 

The GX 550 has experienced engine failures, just not due to bearing failures. They've snapped a few timing chains though.

And it's the LX 600, LX 500. And the 2022 and 2023 model year LX 600 has the same engine recall - 24LA04 - and it's also recalled across the world, not just in the United States.

 

24LA04

 

Quality Manager was not fired. Abruptly resigned though. It's been a year since that happened - June 25, 2024.

 

PR GUY!

 

ok, that was funny, HA

 

its the way it is here, they go in cycles, it will be quiet for a while then one pops in and they all start the same cycle over again with no facts.

@ColoradoTJ had the perfect descriptor and Im stealing it, #shitposting, lol, love that

Here is the fact and the only fact : only toyota knows whats going on with all these trucks and the failure rate, nobody else does.

 

Maybe Chris Hanson can do an expose.

 

Perhaps disappointment is better. The truck is a pavement princess that's primary purchase objective is towing 3500# boat / 7000# car trailer and poor winter weather driver (4WD). It meets my objective and some. Nice ride, runs well.

My disappointment is that it's my first Toyota from 40years of GM and Ford vehicles. I was used to and tired of the issues they refused to address such as lifters in the LS (I've replaced a few) and wheel hubs that ABS sensors failed. At least in those cases they could be addressed. The 3.4l fails are open ended. No warning, as fails not predictable. As I tow a bit, called Toyota care who made it clear, if the truck dies and needs to be towed, I'm on my own with the trailer which can get logistically complicated quickly. I'm confident this generic policy is the same with the big 3.

Net is, I'm fully aware fails do happen. As my prior vehicle(s) could fail/did too. With internet information, knowing there are is documented fail rate drives the disappointment. I just never expected to have engine fail rate as topics from Toyota as the 5.7 was robust..

Perhaps it's simply "expectations are the fools income"

On the other hand, should I be motoring along and have it puke, I do know the short block will be replaced. The fail is nothing new to debug. - that's a positive, right?

As for this thread, the noise content is deafening.

 

I never said any of that.

also, you cant be that concerned with reliability, I mean you lost credibility for that stance going to a GM. I understood before being a 2nd generation tundra, but damn, beating up the 3rd gen owners talking about all this and buying a GM is a joke.

to be clear, I do not wish anything happen to your truck so don't read it that way, hope it gives you many years of service, but your not preaching from a 2nd gen tundra perch anymore.