So I went to Costco and got a new battery. Great prices there on Interstate batteries btw. I think the old one is probably find but for $175 to replace...better safe than sorry.

Unfortunately, same issue happened this morning in 23 degree weather.

Engine turns over and over. Crank.

When it's failing like this and I put the key in the accessory position, I can hear the fuel pump relay click but don't hear the fuel pump...until after the first successful crank. Then i hear it every time and the motor starts every time for the rest of the day.

Then I hooked up the Foxwell, activated the fuel pump relay a few times...and boom, it cranks. It does usually take 2-3 activations with the Foxwell for it to turn over. No problems after that. Everything works normally.

I suppose the relay could be in the process of failing but I just don't know.

My codes have come back though.

E3 and E4: DME Fuel trim bank 1 and 2, permissible range exceeded. I'm guessing I must have a tiny vacuum leak that will need to be professionally smoke tested.

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2005 X5 3.0i - 71k mi (9.2018) -> 81k (9.2019) -> 100k (9.2021) -> 123k (8.2025)
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SOLD : 2003 X5 3.0 - 177k mi (9.2018) -> 186k (9.2019) -> 205k (9.2021)
SOLD : 1997 328is Coupe - Hellrot Red
SOLD : 1988 528e w/ Bullseye s256 / MS2 Extra / GC Coilovers / Yukon Coils ~ 300+ HP