4 series tyre valves

[Nohare93]

Hello,
Apologies if a stupid question but I went to view a car earlier and noticed some of the tyre valves looked odd/ had something white on them. Haven’t seen this on a car and wanted to check this wasn’t something I should be aware of?
Many thanks in advance.

[Haltamer]

Did they have any valve caps on them? Wonder if they had metal caps on and there was some kind of bimetallic corrosion?

Shouldn't be a major put-off as unless it's got TPMS valves, they'd usually be replaced with a tyre change.

[Stick Legs]

The aluminium in the tpms valve has reacted with something, as said probably a metal valve cap.

Get them changed at the next tyre change and mention it to the seller, it'll be worth a small consideration but not more than £200 tops.

[stevemcs]

Thats a TPMS valve with the valve cover missing, you can replace the valves, they are around £20 from BMW.

[Nohare93]

Ah okay, that makes sense. Thanks all!