[90MSP]

So 4 months ago I had both thermostats replaced because it ran cold at 70 degrees.... it then ran at 90 for 3 months when it suddenly ran at 70.

Main thermo replaced and running back at 90. One month later running at 70 again !!!... WTF !... bad luck or something more sinister afoot ?

[confused.com]

OEM or europarts replacement? Ecp ones are known to fail, haven't heard of any issues with orginal parts giving up so quick.

[Jase 320d]

I've just checked mine

ECP stat fitted around 3 months ago!

Was hunky dorey at 90 degree's

Just checked right now out of interest...


Back down to 74 degree's!



Looks like im in the same boat! Refund time
Or will they just replace? Im not interested in a replacement!!

[90MSP]

I've just ordered a new EGR thermo. Less likely the main one has gone as that was replaced with an original part. Considering the work i've had done recently around the EGR it's most likely that..... and the easiest to fit

[Ajerthan]

You guys do this your self or get a garage to do it? If a garage what kind of figures are you looking at, need mine changing...

[Jase 320d]

I did it myself

Egr thermo is simple
And the main stat is also quite simple. You just need basic tools to do it


At a garage id imagine £100 labour to change both

[e91boi]

I changed mine before xmas and my ECP lasted 1 week, Replaced with Gen BMW still going strong now.

[Ajerthan]

Originally Posted by Jase 320d

I did it myself

Egr thermo is simple
And the main stat is also quite simple. You just need basic tools to do it


At a garage id imagine £100 labour to change both

any DIY guides? Kind of rubbish without them

[Jase 320d]

Originally Posted by e91boi

I changed mine before xmas and my ECP lasted 1 week, Replaced with Gen BMW still going strong now.

Did you get a refund?

[Jase 320d]

Originally Posted by Ajerthan

any DIY guides? Kind of rubbish without them

I used one from the interweb. Just google m47 main thermostat replacement diy?
I think its on bimmerforums (runs and hides)

[e91boi]

Originally Posted by Jase 320d

Did you get a refund?

Yes I did, tried to get a refund for the antifreeze that I wasted but didn't work

[90MSP]

Well replaced the EGR stat on Sunday and still the same.. 70 degrees at best. Main stat again then !!.. bloody guessing game that keeps the car cool and me hot under the collar !

[90MSP]

Main thermo had a blown seal... kindly found and replaced by Bromspec. So that's both stats replaced TWICE within 5 months. Bad luck I hope, that ends here !

[Dr Dave]

Only ever use OEM parts.

[marknjayne]

mine sits at 70 ish when driving gentle round town etc,on a good run gets to around 80 and driven very hard 90-100,changed the egr stat and made no difference,i cant be bothered messing with the main,the amount of 330/335 d's that have this issue is unreal,i dont have a dpf so it dont bother me as i dont need the temps for regens

[90MSP]

Originally Posted by Dr Dave

Only ever use OEM parts.

The annoying thing is the last time the main stat was replaced they did use genuine OEM parts. Just sods law I suppose.

Now the car gets up to 90 quickly, and I can notice that it runs smoother when there... akin to the difference when running an old car with the choke in or out !.