A45 rust component on brand new car
The second questions is, there seems to be a port next to a flu reservoir that has a machined thread and yet to plug or cap? Seems anything could simply fall in or killed water filling windscreen washer could simply go intonthe hole? Not sure what it is for and if it should have a cap? Anyone else have an A45s for comparison please?
Thanks.
Your rusted piece looks like its been exposed to lots of moisture. Mine is bare metal with a tiny bit of surface oxidisation only.
My port next to the reservoir is empty like yours.










