Z3 ABS & ASC unit is mounted in engine bay and is susceptable to heat of engine causing the module to fail over a period of time. The diagnostics showed error code 71 return pump and also he also reset errors of the speed sensors as the 2 front sensors also indicated errors, drove it for a while and the sensor errors did not return. The dealer quoted R9000 for replacement unit and I managed to source a 2nd module from E46 at a scrapyard Fitted the module on ABS pump and ABS ligth is off only traction control ligth is still on. I need to get it reprogrammed and that should fix traction control.
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Had the ASC module programmed to work with the Z3 today by a mechanic in PTA East and the traction control ligth is off, I tested it by using the switch to deactivate and also on a wet road. Cost me less than R2000
:joy: