Question about 2001 Lexus RX 300

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Just had the transmission in our 2003 rx300 rebuilt & am now being told that the computer is bad & it caused all the problems? Is there 1 computer or does the transmission have its own as I have seen it listed on parts for sale websites?

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Posted on Jan 02, 2017

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SOURCE: There is a car for

No there is no way of putting a better transmission in it and these kinds of cars have interference-motors in them to were if the timing-belt breaks then the pistons will hit the vavles because the valves have stopped going up and down. In-short, when these tauruses have that many miles on them, the timing-belt will be going bad as well or even break then you will really have a problem.

DON"T BUY IT, THEY ARE MONEY PITS!!!!!!

Posted on Dec 27, 2010

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ZJLimited
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SOURCE: 2000 lexus RX300 transmission problem

Are you check trans fluid levels? Sound like a problem with the torque converter or internal valve body solenoids clugged. I suggest check with your technician before to buy or think in replacement parts.

Hope this helps.

Posted on Feb 08, 2012

  • 14036 Answers

SOURCE: I need to replace the alternator for my wife's 2003 Lexus RX300. Do I buy a 100 amp or a 130 amp alternator, and does it matter?

you need take old alternator with you to auto parts stores they can match up your alternator give you the correct AMP TYPE, your alternator amps is stamped on the out side alternator housing, the auto parts store can look up right amp alternator for your vechicle.when you say dont matter yes it does if you get wrong type alternator, your battery wont have good charge causing alternator fail early and battery fail early.

Posted on Feb 13, 2012

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1 Answer

Location and access to Transmission Filter to change Trans. oil and Filter


Hi Lb,
My car is RX300 1999 and has the same problem. I changed the fluid 2 years ago after the trans slip and lost the shift. Afterwards it worked for another 2 years. But recently it doesn't work again even I change fluid and put Stop Slip additive to the trans. I was told the trans has to be rebuilt. So changing fluid and filter can help to maintain the trans for sure and can prevent problem. But if the trans has already worn a lot, it can't help at last.

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It can be issue with gears or problem with transmission and needs to be rebuilt. Also get the tranny fluid checked. If it's low, then such problems occurs.


To troubleshoot these types of issues, check the actual solved problems with these types of issues.

There are solved help links provided below: -------

Click the link below and go through the details and diagrams to troubleshoot the problem: -----

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http://whatisbyme.blogspot.in/2012/05/2003-lexus-rx300-transmission-fluid.html

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--------

These will help.

Thanks.

Feb 15, 2013 | Cars & Trucks

1 Answer

I need to replace the alternator for my wife's 2003 Lexus RX300. Do I buy a 100 amp or a 130 amp alternator, and does it matter?


you need take old alternator with you to auto parts stores they can match up your alternator give you the correct AMP TYPE, your alternator amps is stamped on the out side alternator housing, the auto parts store can look up right amp alternator for your vechicle.when you say dont matter yes it does if you get wrong type alternator, your battery wont have good charge causing alternator fail early and battery fail early.

Feb 12, 2012 | 2003 Lexus RX 300

1 Answer

2000 lexus RX300 transmission problem


Are you check trans fluid levels? Sound like a problem with the torque converter or internal valve body solenoids clugged. I suggest check with your technician before to buy or think in replacement parts.

Hope this helps.

Feb 08, 2012 | 2000 Lexus RX 300

1 Answer

My 2003 Lincnoln Ls has tranny problems! It's


No reason to replace a PCM behind the glove box

I have the same car, a 2004 V8

I replaced the One & only solenoid pressure control pack on mine

Having owned a trans shop in New Jersey years ago, I find your remarks
rather harsh

If they rebuilt the unit correctly , it should be fine & it should not have failed in 8 years,
if you changed the fluid every 30,000 miles, then what happened & why?

What were you told & why are you not back there?

Were updates done on the trans to correct the original problem
or any mention of a dealer flashing updates into the pcm?

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2 Answers

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may be a bad news! check your transmission fluid first. however, I think your transmission is bad.

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1 Answer

Lexus rx300 2002 hard shift between 1st and 2nd. Fluid and filter changed 3000mi ago, car has 93000mi


The 1999-2003 Lexus RX300 models have a common failure of the engine computer that causes the harsh shifting of the transmission. You need to get the computer (ECM - Engine Control Module) rebuilt or replaced before it causes permanent damage to the transmission. Even if the transmission is already ruined, the ECM will still need to be repaired. Most often, the transmission is fine though, and rebuilding the ECM will restore the smooth shifts that the Lexus should have. Circuit Board Medics can rebuild the ECM and reprogram it so that you only have to plug it back in when you get it back. See the link below:

http://circuitboardmedics.com/1999-2003-lexus-rx300-hard-transmission-shifting-ecm-ecu-computer-repair/

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1 Answer

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Most likely a bad wheel speed sensor or wiring harness issue.

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Did you have it serviced or rebuilt, If you had it rebuilt I would take it back to the trans shop for warranty repairs.
If they just changed the trans filter I don't think it would cause your problem.You just have bad luck with the slipping trans

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My Mom also had her trans rebuilt and was later told that flushing the trans and replacing the filters could have solved the problem without the total rebuild ! After it was rebuilt she had the same problems all over again and it turned out that the trans seal was broken. Does it spit out transmission fluid when you drive it? If so, this is might be the problem!

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