Chugging water and rough idle

[hickatew]

So when I left Autozone this morning I'm almost positive the SES light was still on. When I left work a few hours ago, it was mysteriously gone. Do these things just clear themselves after a some miles? Might have just missed when the Autozone guy cleared it but I don't think so

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[az3579]

Check your oil and make sure it's not milky. Disappearing coolant (with no trace of coolant loss externally) sounds like a bad head gasket to me.

[SaltyNC]

You can get duralast coils for these cars from any Autozone or whatever. I had a lean condition (likely vacuum leak) on my last zhp that was killing could packs once a month.

Cool. I didn't know they carried them for BMWs.

Salty

[ELCID86]

So when I left Autozone this morning I'm almost positive the SES light was still on. When I left work a few hours ago, it was mysteriously gone. Do these things just clear themselves after a some miles? Might have just missed when the Autozone guy cleared it but I don't think so

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Yes. I have a SES that pops on/off intermittently. I think it’s a misfire.

[Sockethead]

If you can't find the leak and your oil isn't milky, take the cap off the coolant tank and take a whiff. If it smells like exhaust, it a bad head gasket. This is how I ID'd a bad head gasket on my first bimmer : low coolant light, no trace of leaks, no milky oil, no smoke out the tail pipe

Also if the SES light is a hard code, they remain even after the light goes off so you should still be able to read it. Soft codes may reset after a period of driving