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The fuel pump relay is a likely candidate, but as you’ve replaced it, along with the spark plugs, I’d take a closer look at Lambda oxygen sensor. Had similar issue with mine and BMW will literally replacing parts left, right and centre. They changed out this sensor and even the fuel tank first. Then finally the fuel pump relay.Part for mine was 11788604930I should say it wasn’t a misfire, rather CEL error, to the point the engine wouldn’t engage. It would also be worth investigating the HV cable points. These cars do suffer from corrosion and moisture on these points. Switch off under the frunk before releasing, cleaning and reattaching cable points.
The fuel pump relay is a likely candidate, but as you’ve replaced it, along with the spark plugs, I’d take a closer look at Lambda oxygen sensor. Had similar issue with mine and BMW will literally replacing parts left, right and centre. They changed out this sensor and even the fuel tank first. Then finally the fuel pump relay.
Part for mine was 11788604930
I should say it wasn’t a misfire, rather CEL error, to the point the engine wouldn’t engage. It would also be worth investigating the HV cable points. These cars do suffer from corrosion and moisture on these points. Switch off under the frunk before releasing, cleaning and reattaching cable points.
