I would look at the starter first. When those start to go they are intermittent.
Hope you don’t have the same problem I had…
I was having electrical gremlins for several months in 2020. Dead battery and no start symptoms. It would be fine one day and then be dead. Alternator good. Battery new. Thought mice got in there and chewed on wires so looked for that for weeks. Thought it was a shorted out ground wire coming from the ECU. Replaced it. Was fine for a weekend - then dead again. Finally pulled the ECU (between the wipers). The ECU was completely corroded inside. Even had a water line inside the ECU housing. I have always blamed it on poor sealing of the unit, after a custom engine tune in 2015. BUT have since seen other ECUs that were corroded inside. So maybe a VW thing or an old car thing…
The whole episode took 9 months of frustrating and expensive trouble shooting. Even blamed COVID for a while, because 2020 was a BAD year. I actually had a heart attack about half way through the problem and I was considering parting out the caR at one point, because life is too short…
In the end, persistence ruled.
Hope you get to the bottom of it.
View attachment 271837
View attachment 271838
View attachment 271839
View attachment 271840
Hope you don’t have the same problem I had…
I was having electrical gremlins for several months in 2020. Dead battery and no start symptoms. It would be fine one day and then be dead. Alternator good. Battery new. Thought mice got in there and chewed on wires so looked for that for weeks. Thought it was a shorted out ground wire coming from the ECU. Replaced it. Was fine for a weekend - then dead again. Finally pulled the ECU (between the wipers). The ECU was completely corroded inside. Even had a water line inside the ECU housing. I have always blamed it on poor sealing of the unit, after a custom engine tune in 2015. BUT have since seen other ECUs that were corroded inside. So maybe a VW thing or an old car thing…
The whole episode took 9 months of frustrating and expensive trouble shooting. Even blamed COVID for a while, because 2020 was a BAD year. I actually had a heart attack about half way through the problem and I was considering parting out the caR at one point, because life is too short…
In the end, persistence ruled.
Hope you get to the bottom of it.
View attachment 271837
View attachment 271838
View attachment 271839
View attachment 271840
