Hi Guys,
I have this posted on E90Post but thought it may be of some use to you Guys.
Brand New BMW N47/N57 Thermostat and Gasket 11517806975 & 11517805192
These were bought in readiness for a recent service for my 330d however it was found that my thermostat was fully functioning and I actually had a Glow Plug issue.
These should fit;
F07/10/11 fitted with the N57 engine
525d
530d
£25 delivered