Cleaned ICV and throttle bodies, now pool of oil appears

[gashby]

I just purchased an 03 HPF M3.I cleaned the ICV and throttle bodies and after I was done car started and ran and I shut it off. Next day I came out to the garage and there was a giant pool of oil underneath the car. Any ideas on what caused this?

[Shonky]

Is it only oil?
How did you clean?

Sounds unrelated to me unless you left something disconnected?

[WestBankM4]

ICV and Throttle Bodies are related to airflow and A/R, they don't have any thing to do with oil. Did you unplug something during the process? Sounds like it's unrelated, did you get underneath the car and find the trail?

[D-O]

Breather hose on the bottom of the manifold not correctly re-attached?

[AWE46M3]

Breather hose on the bottom of the manifold not correctly re-attached?

+1 double check that hose as it connects to the dip stick/oil pan. What you're describing sounds like an oil pan leak

[m3_sancho]

If you have SMG, your hose to the reservoir might be not connected properly.

[sapote]

If you have SMG, your hose to the reservoir might be not connected properly.

I vote for this.

[sapote]

Breather hose on the bottom of the manifold not correctly re-attached?

This should cause lean codes but OP didn't say, so I think he has SMG and its oil leaking.

[gashby]

It was the Oil cooler line, It failed. On to my next issue!