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      03-16-2025, 08:25 AM   #1
M5 Hayden
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Starting after 6 months of being unused

Last year my 2012 BMW M5 suffered from a breakdown from flywheel being loose which is cutting the crankshaft positioning sensor, making the car undrivable, didn’t want to fix it as it would be too expensive, since that the car was sitting in my driveway and left unstarted for about 6 months.

I’m looking to bring it back to life in the next month. Other than changing oil what maintenance should I do before starting my M5 that’s been left unstarted for quite a long time?

Thanks

Last edited by M5 Hayden; 03-16-2025 at 08:27 AM..
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      03-17-2025, 09:21 PM   #2
bmbmw66
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Nothing really. Recharge or jump the battery as long as there’s oil in it just fire it up check fluids and any leaks. After that change the oil.
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      03-18-2025, 06:34 AM   #3
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Quote:
Originally Posted by bmbmw66 View Post
Nothing really. Recharge or jump the battery as long as there’s oil in it just fire it up check fluids and any leaks. After that change the oil.
Thanks should I replace my plugs too just for a peace of mind? They’re about 5000km old but my car has worn valve stem seals which might clog them up

Last edited by M5 Hayden; 03-18-2025 at 06:35 AM..
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      03-18-2025, 09:24 AM   #4
bmbmw66
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Quote:
Originally Posted by M5 Hayden View Post
Thanks should I replace my plugs too just for a peace of mind? They’re about 5000km old but my car has worn valve stem seals which might clog them up
Don’t think u need to but just pull out a few and check the condition instead of blind guessing
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M5 Hayden102.50
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