I have a USA registered '95 X300 and my remote stopped being able to function and although the vehicle entered learning mode it failed to learn where previously I been able to succeed in doing so without a problem.
The remote was marked within it, 433mz so I bought a couple of new ones of this frequency but neither would 'learn'. Finally I gave up thinking the fault must be the programming unit in the car itself that was faulty and not the remote fob.
Reading another thread however and checking my rear window antenna, it seems my antenna is 315mz.
Information re' VINs in the other thread also suggests that my system is 315mz.
Now comes the confusion. How was it therefore that previously I was able control my car with a 433mz remote?
Please put me out of a state of total confusion!

 

Here are some old TSBs for info

bob gauff

 

Hi,
I think the reason for this is simply different countries = different laws.
Only few small frequency ranges are allowed to be used for remote controls etc. (ISM band). And in US and Europe regulations are different. US/Japan: 315Mhz, Europe: 433MHz. Therefore car manufacturers have to equip the cars with different r/c versions for US and Europe.
As far as I understood, they just assembled the wrong antenna version. The difference here is just the length. It will work though, but with a poorer reception performance (range). But in each case a 315MHz Key will not work with a 433MHz Receiver and vice versa.
I still have some 315MHz keys. If you are interested pls. contact me.

 

Big thanks to you Bob and also to you Turbolag. Hope the lag of your Turbo is soon eased!