If you interchange an Lexus rx330 2005 cluster with a Lexus rx330 2009 cluster. The clusters have different mileage. -what's the correct procedure? - the cluster retain the mileage of the new cluster? -the new cluster need a program action? -the 2009 cluster fix in a 2005 vehicle?

This is one guy's advice: Replace the speedo head, that should take care of the problem."

This site is also interesting because the guy said
General Motors cars had instrument cluster problems from 2003 through 2006. When I researched instrument cluster problems on the Internet what I found raised concerns in me. Many of those vehicles had problems that began with the instrument cluster, but eventually led to the engine refusing to start.
(an electronic instrument cluster, digital instrument panel or digital dash for short, is a set of instrumentation, including the speedometer, that is displayed with a digital readout rather than with the traditional analog gauges. Many refer to it simply as a digital speedometer.)

http://www.instructables.com/id/Erratic-Instrument-Panel-on-GM-Cars/

No, they are different only in software. If you need to swap out the cluster you need to stay with the same manufacturer as they are the same company that has programed the ECU/EPROM.

Sounds like someone needs to do some more troubleshooting first. Changing the cluster is not a simple matter since your mileage will be different. And the cluster is on a different circuit that the ac so one should not affect the other.

Could you have missed reconnecting a wire someplace? Possibly a ground

The New/used cluster mileage will show up. However I can reprogram your cluster to the correct mileage from a new or used cluster.

You're not committing any ***** by replacing a cluster with one that shows less miles.

However, you WOULD be committing a ***** if you sold the car knowing that it had covered more miles than was indicated.

If you sell the car, tell the new owner about the mileage.

Other than that, you're doing nothing wrong

I am not sure if these facia units are interchangeable or not but i can assure you that the electronic mileage is unique to every unit and will have to be changed by using specialust diagnostic equipment.

While the instrument clusters in all the 1995 ls-400 look the same, they are not created equal. They use different part numbers for the same model year. So the repair depends on the cluster part number itself because different part numbers, means they have different circuits boards, and different parts inside, and this includes the numbering of the capacitor locations inside. So the idea of "which capacitor to look for" depends on the particular circuit board version or part number you have.

Incidentally, the "capacitor repair" fix you see on the web to repair the burned out cluster lights issue doesn't apply to the 1995 instrument cluster. It applies to the 1994 and earlier instrument cluster. Similarly, you can't put a 1997 cluster inside a 1995 ls400 because the blue plug on the cluster is a different size. So it's critical the part number of the cluster needs to be identified before you can repair or replace one. The 1995 ls400 could have an instrument cluster with part number 83010-50592 or 83010-50590 or 83010-50600 etc... Instrument clusters are not simply interchangeable with ones with different part numbers either, because the vehicle ECU is programmed to only work with the specific cluster part number that originally came with the vehicle.

Also Lexus dealers are no longer replacing these because the part is no longer manufactured. However, you can get them repaired. Search the web for "lexus ls400 instrument cluster repair"

Location of part #... This one is 83010-50600...

Hello hayeizmyhome...Very low mileage for a 1990 model. However... this is usually around the mileage interval the dreaded instrument cluster, panel and dash light failures start...lights will flicker, then go out, gauges will start going up and down, lcd's will become hazey and hard to read....etc.
The instruments are illuminated both day and night while the ignition is on.
When the ignition is off, the panel goes dark and you can’t see the gauges at all.
The lexus has an electronic circuit board behind the inst. cluster that has been the problem. Very expensive repair if done by dealer.
*TIP* This circuit board can be repaired if you know a good electrical technician much cheaper.
The recommended timing belt replacement interval on the LS is 120k...water pump should be replaced also, the timing belt runs the water pump. The LS has a non-interference engine, meaning if the belt breaks, no damage will be done to the engine...
Hope this answers your questions..and your lexus runs for many more miles...with proper care and maintainnace, it will.