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Lexus RX 400h

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What is this discussion about? Lexus RX 400h, Hybrid Cars

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#2047 of 2334 New CR survey finds 400h the most reliable Mid-SUV by frenchorne Oct 28, 2005 (6:52 pm)
Latest CR survey for reliability,   http://www.consumerreports.org/main/detailv4.jsp?CONTENT%3C%3Ecnt_id=754189&FOLDER%3C%3Efo- lder_id=113261&ASSORTMENT%3C%3East_id=333137&bmUID=1130553212850   http://www.cnn.com/2005/AUTOS/10/26/cr_most_reliable/index.html   Very impressive start for the 400h. I have had zero problems in the first 8,000 miles.
#2048 of 2334 With a 1% failure rate.... by wwest Oct 28, 2005 (7:57 pm)
99 out of 100 RX400h owners will report no problems.
#2049 of 2334 Re: The X5 and X3 [wwest] by hendjaz Oct 29, 2005 (12:39 pm)
Replying to: wwest (Oct 28, 2005 9:30 am) Odd, we haven't experienced any problem defrosting front/rear windows in cold weather in our 400h. Press a button and it instantly takes care of any window fogging. Like other vehicles including my former bmw 530 you can set it so air goes wholly or partially to the windshield for continual defogging. Not a big deal imho. Replies to this message: wwest (Oct 29, 2005 4:54 pm) mirex (Oct 30, 2005 8:29 am)
#2050 of 2334 Re: The X5 and X3 [hendjaz] by wwest Oct 29, 2005 (4:54 pm)
Replying to: hendjaz (Oct 29, 2005 12:39 pm) First, the ability to defog/demist the rear window is not in dispute. I don't know of any automotive manufacturewr that doesn't use HEAT exclusively for that task.   Otherwise agreed, as long as the Rh and OAT is in the range wherein the A/C can efficiently dehumidify the incoming airstream the Toyota/Lexus system will work perfectly fine. But that probability becomes less likely as the OAT declines below ~45F and impossible below about 35F.   But the real problem occurs just below that 35F point when the A/C is totally and completely disabled by design (it wouldn't be functional anyway). The only way to defog/demist the windshield beyond that point is to throw HEAT at the windshield, lots of it initially until the windshield is fully defogged and then enough hot flow afterward to maintain the windshield interior surface above the dewpoint of the cabin atmosphere.   The potential problem that I foresee is that just as, simultaneously with, the Lexus climate control switching the airflow to the footwell and windshield (presumably from dash, cooling, airflow mode) the A/C compressor is being disabled. The evaporator might be covered with condensate as a result of the previous A/C operation and now that condensate will begin to evaporate into the cold and dry incoming wintertime airflow. Super-saturated airflow that a substantial portion thereof is now headed for a COLD interior windshield surface. Replies to this message: mirex (Oct 30, 2005 8:29 am)
#2051 of 2334 Re: The X5 and X3 [wwest] by mirex Oct 30, 2005 (8:29 am)
Replying to: wwest (Oct 29, 2005 4:54 pm) I never experienced that problem in my two previous RX300s. I will look for it on my 400h when the temperature goes below 45F and 35F. Thanks for the caution.
#2052 of 2334 RX330 owners manual re: by wwest Oct 30, 2005 (3:17 pm)
automatic climate control.   2005 RX330 owners manual, page 246, right column.   "The "Floor/Windshield" air flow mode may be applied automatically, if the outside temperature is lowered (??) down to below 0C (32F).   This is not a malfunction. "The Floor/Windshield" air flow mode turns on the defogging and defrosting function with the purpose of cleaning(??) your front view for safe driving".   This firmware change has arisen because too many of us, all the way back to 93, were experiencing unexpected and sudden windshield fogging shortly after the A/C is automatically disabled as the outside temperature declines below ~35F.   Once the A/C is disabled it is already too late, but I guess we should give Toyota/Lexus/NipponDenso an "E" for effort. The best procedure for owners to use is to manually select the combined mode, Floor/Windshield, once it is obvious that the outside temperature has declined below ~45F. That way the interior windshield surface will be preheated in in the event the outside temperature continues to decline and the A/C become inoperative.   Actually I find that the idiot thing remaining in cooling mode, coolish and dry airflow from the dash outlets, is extremely discomforting during predominantly cool or even cold weather. I suspect no one at the corporate engineering level of any of these companies is aware of the adverse effects of radiant cooling (lack of radiant heating, actually) on the human body. Replies to this message: falconone (Oct 31, 2005 4:31 pm) wwest (Oct 31, 2005 6:30 pm)
#2053 of 2334 automatic airconditioning - OFF by skyfish400h Oct 31, 2005 (4:00 pm)
The best way to stay in control of humidity and temperature is to take it into the service center and have them set the user option for Automatic Airconditioning to OFF.   That way it will not go switching inot to AUTO mode when you least expect it, and you can drive around in the snow with the AC on if you want to. It will not switch off because it thinks you are cold enough.
#2054 of 2334 Re: RX330 owners manual re: [wwest] by falconone Oct 31, 2005 (4:31 pm)
Replying to: wwest (Oct 30, 2005 3:17 pm) I had the same problem in my Audi A4. Replies to this message: wwest (Oct 31, 2005 6:30 pm)
#2055 of 2334 Re: RX330 owners manual re: [falconone] by wwest Oct 31, 2005 (6:30 pm)
Replying to: falconone (Oct 31, 2005 4:31 pm) But your Audi more likely had a fogging problem on the outside surface of the windshield during a humid day or early evening.
#2056 of 2334 Re: Strange/Weird... [rx400hfan] by ronr9286t Nov 03, 2005 (8:34 am)
Replying to: rx400hfan (Oct 13, 2005 10:32 am) I'm not sure if this is the best place to post this question, but it seems that this a thread on power-train. My dealer was just notified that they have been allocated 2 FWD 400h cars. In looking at the brochure, the 0-60 time is somewhat slower, the weight is lower, and the mileage is higher. I'm not too concerned about 0-60, but rather rolling acceleration (e.g., 30-70). Any thoughts on the relative merits of AWD vs. FWD (aside from the obvious off-road and snow capabilities, neither one of which is important to us)?

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