not so smart ls430

[deelcee]

a year ago now on opening my 430 remotely the alarm sounded for no reason!

I managed to turn it off but the smart system never worked again!

I could open the doors remotely but not the boot! 6 months later even that didn't work and I was left opening and closing the doors manually with the key!

so off to Lexus derby ... to cut a long story...they had the car for 3 days and couldn't sort it! 

I have now purchased a used 'theft ecu' with matching master key!

will this be plug n play or will it need programming?

also will the new key need programming to the main ecu?

any help or advice would be great as I don't mind using the key as in the old days

but the alarm and immobiliser is inactive!!

[cruisermark]

I cannot help with your query - I hope you get a resolution soon

[deelcee]

thanks