BMW Replacement part
A Topran 179BM047000005 or 11127806196 does the job nicely for less than £10 from eBay, as I had to find out to my displeasure.
Well at least my coolant doesn't need topping up every fortnight anymore.
Thanks to the anonymous person at a meet who diagnosed the source of the leak.
Last edited by MarkS; 3rd November 2019 at 06:46..
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