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Hi, I’ve had a problem with a seat ECU on my ’90 Coupe. Probably due to water coming in from the sunroof onto the seats and leaking through, some of the traces on the printed circuit board had blown off. I fixed them and got it to work with the manual controls again but the memory function never did work again even after replacing the counter chip. I’ve given up fixing it for now and just bought one of the two ECU’s Lager mentions from ebay. Installing it will be a job for this summer. The ECU is a very basic, mostly analog circuit. It has no software, no processor etc. but it is steering the relais and thus essential also for the manual seat controls.