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Lexus RX 400h Engine Problems

52 messages,  Last post on Feb 05, 2009 at 6:59 AM

You are in the Lexus RX 400h Maintenance & Repair Forum. Your Host is pf_flyer

What is this discussion about? Lexus RX 400h, Engine, SUV


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#8 of 52
Re: Stuttering/Missing [lexus400] by wth18359
Apr 06, 2006 (7:26 am)
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Replying to: lexus400 (Apr 04, 2006 4:23 pm)

I'm glad (well, not really) to hear that someone else is experiencing a similar problem. I'm feeling what I would call a vibration at 42-45 MPH. I first thought it was tires, but after having them balanced, then installing winter tires, I'm convinced it is something else. It comes and goes. I almost always feel it when the engine is cold, and usually under light acceleration. There is no indication of anything odd on the display, such as quick switching from battery to ICE. The dealer has tried to find the problem twice, and they can't really feel it, let alone find it. I'm giving the dealer one more change to figure it out, then I'm calling Lexus.
#9 of 52
Re: Stuttering/Missing [mkkid] by lexus400
Jun 12, 2006 (1:26 pm)
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Replying to: mkkid (Feb 20, 2006 11:28 am)

Are you still experiencing this issue. I have really been run around at my local dealer and Lexus customer care. At first this is a new problem, then I am the only person having this problem-then there is a fix in the works-interesting if I am the only one with the issue-or is a fix in the works. Since 500 miles I have been reporting the issue, I now have 10,000 miles and feel like I am being shaken to pieces between 37-42 mph. I am now onto the National Center of Dispute-and can't get the guy to even return my calls. For +$55,000 by the time that I added on all of the extras-I feel that I have a lemon or a car that wasn't ready for release. I have waitied now 4 months for the next month there will be a fix, now mid June according to the dealer, mid August according to Lexus. Anyone else with these issues-any fixes that have worked-any other proposed fixes????
 
Thanks
#10 of 52
Re: Stuttering/Missing [lexus400] by gagrice
Jun 12, 2006 (4:15 pm)
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Replying to: lexus400 (Jun 12, 2006 1:26 pm)

I am being shaken to pieces between 37-42 mph
 
That sounds bad. Most of our surface streets are 35-40 MPH. Does your state have a Lemon Law. If you have all the dates you were at the dealer I would try to invoke the law. They may be trying to jack you around till the warranty expires. I would get a signed statement each time you take it in, stating they are working on the problem. Keep us posted.
#11 of 52
Re: Stuttering/Missing [gagrice] by lexus400
Jun 12, 2006 (5:23 pm)
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Replying to: gagrice (Jun 12, 2006 4:15 pm)

Thanks, I even told them that I was going to come into the service center every week. The manager asked why I would do that-I said that there was some law called a lemon law where I had to be in for something like 3 visits with them unable to fix the car. He flat out told me that I could tell them that and that they would just say that they couldn't duplicate the problem. I really fell like they are playing cat and mouse with me. My husband was ready to buy a new Lexus, and that has certainly been put on hold or maybe even out of the question. Thanks for the advice. I am trying to move on with the National Center for disputes but the guy that is supposed to return a call within 24 hours won't respond either. Guess next time I should buy a hunk of junk then I will expect a hunk of junk.
 
Thanks for your response and I will keep you all posted.
#12 of 52
Re: Stuttering/Missing [lexus400] by doneby2010
Jun 16, 2006 (12:03 pm)
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Replying to: lexus400 (Jun 12, 2006 1:26 pm)

Have had 400h for 6 months (and 5000 miles) and don't have this problem. The car has a smooth ride and has no vibrations similar to what you described.
 
sorry...
#13 of 52
Re: Stuttering/Missing [doneby2010] by lexus400
Jun 21, 2006 (9:51 pm)
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Replying to: doneby2010 (Jun 16, 2006 12:03 pm)

Consider yourself one of the lucky ones. My dealer told me 2 weeks ago that he has 6 of them with this issue and that mine is the worst one that he has. Hope that they will address this issue and resolve it soon. I love the hybrid idea but need to be able to drive between 37-42 without nibbles/vibrations.
#14 of 52
Re: Stuttering/Missing [lexus400] by lxpatel
Jul 08, 2006 (8:53 pm)
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Replying to: lexus400 (Jun 21, 2006 9:51 pm)

I haven't had any problems with it either, 8k miles and 8 mos in service. Great gas mileage on highway, got 27 on trip from LA to San Diego and back, 80+ all the way.
#15 of 52
Just want to know by jordanf
Jul 16, 2006 (7:35 pm)
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Could someone tell me the difference between an interference and non-interference engine
#16 of 52
400 H nibble by lexus400
Jul 17, 2006 (5:49 am)
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Well, the car still nibbles with 10,000 miles. They said the computer fix would be here July 4th week, it is the 17th and now they are saying it takes 30 days to get it from Japan-but I will be one of the first to get it.
 
My father drove the car after taking up to the airport, and he said that he thought that he was going to get sick from the rocking/pulsing that was going on around 40 mph.
 
I have called an arbitrator to start process and if they don't have a soulution very soon, I guess that is the next step. I should have given them the car back the first time because it was within the 30 day, but I believed them when they told me they were working on a fix. I thought that it would not be the right thing to do to give them the car back and demand my money back although at that point I had the legal right to do that. I thought that I was standing by my word to buy the car and that they would stand by their word to deliver a car worthy of the $55,000 price tag and Lexus name. Guess they are trying to prove me wrong and a fool!
#17 of 52
Re: Just want to know [jordanf] by pf_flyer HOST
Jul 17, 2006 (8:49 am)
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Replying to: jordanf (Jul 16, 2006 7:35 pm)

In an interference engine, the valves open far enough into the cylinders that they "interfere" with the piston's space. The interference design actually improves the efficiency of the engine due to the wider opening valves, but if you run into a problem and the timing is off, the valves can actually strike the pistons, which is NOT a good thing at all.

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