In case if your New Year resolution is to lower coolant operating temperature

[bmw540san]

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Update 12/31/16:

3 sold, 2 left. $92 free shipping.

This topic been covered zillion times but general consensus is that 108 C operating temp in M62TU is great for the fuel economy and emissions but not so great for plastic cooling components.

For those who remember the High school Physics classes, more heat = more pressure so it's 2 enemies against the cooling system.

I've sold about dozen of these, mainly on ebay and E39 forum and than my supplier in Europe run out. They're back in stock and have batch of 5 coming in about 7 days.

One is sold, four are still available: $92 including free shipping.

Direct fit to any E53 X5, E38 740i and E39 540i with M62TU engine. This is mechanical thermostat that opens at 88 C and you'll see average running temp of around 88 C-92 C vs. 108 C.

In order to avoid CEL you simply connect 10 OHM resistor to disconnected OEM thermostat DME wiring connector.

This thermostat came originaly on E38 740D and here are some specs:

https://catalog.mahle-aftermarket.co...lterId=1164537

It is genuine Mahle / Behr brand made in Germany and it comes with o ring included.

PM if interested.

Thanks.