which ones which
#1
which ones which
I have a v70 classic 2.5 tdi v reg that won't start no fuel from pump had pump tested that's ok been told it's ECU so need to get that tested but when I opened the black box on left side it has two ECU'S in it anyone know which ones which one looks thinner than the other so just need to know which one is the main ECU thanks
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