[Processing61]

BMW 330d 2006 Auto, M57 engine.

So I just bought a 330D and noticed the MPG wasn’t too good. No other problems noticed other than the mpg. I Thought it improved but it hasn’t. It usually gets around 31mpg on a 30ish mile trip. A/B roads and dual carriage way driving with a little start stop. Apparently that can be down to coolant temp, is this correct? As from looking on this forum, it points to a coolant temp issue. So I’ve checked the temperature in the hidden menu;

The temps:

48 degrees idling for 10 mins after cold start

15 mins of town driving plus a dual carriage way blast to get the temp up, hottest it got to was 76 degrees

Then left to sit again and idle for 10 mins after drive and temp was at 89 degrees

Is the above MPG and temps bad?

If so is the themostats/temp sensor the problem?

What is the fix? If there is a link to a thread, that would be great.

Any advice is much appreciated, thanks!

[Chappers 71]

People's driving styles vary greatly, from what I've read that various deiselists have posted mpg is anything from 26mpg to mid 40's for a 330d
I believe temps should be between 88-91 degrees after 15 minutes of driving, don't let your car sit idling regularly to 'warm up' it won't do it any good long term.

If your cars not getting up to temp renew the thermostat.

[rasa bmw]

yup ya stats are goosed,,both my cars would get to over 90 degrees with the driving you have noted,,,,my e90 330d was averaging 36 mpg when i bought it,,now aveages 44mpg,although its a manual,,my 335d averages 33-35 mpg,,

[Processing61]

Originally Posted by Chappers 71

People's driving styles vary greatly, from what I've read that various deiselists have posted mpg is anything from 26mpg to mid 40's for a 330d
I believe temps should be between 88-91 degrees after 15 minutes of driving, don't let your car sit idling regularly to 'warm up' it won't do it any good long term.

If your cars not getting up to temp renew the thermostat.

Will add it to the list. Thanks!

[Processing61]

Originally Posted by rasa bmw

yup ya stats are goosed,,both my cars would get to over 90 degrees with the driving you have noted,,,,my e90 330d was averaging 36 mpg when i bought it,,now aveages 44mpg,although its a manual,,my 335d averages 33-35 mpg,,

Cheers! Don’t suppose you know if there is a good thread or video about how to replace them?

[Silver Streek]

Sounds like you need new thermostats.

[rasa bmw]

Originally Posted by Berger96

Cheers! Don’t suppose you know if there is a good thread or video about how to replace them?

egr stat is a simple job,,main is connected to waterpump,,so good idea to do that along with belts/coolant change..unless you know they have been done recently..my bolts from stat to waterpump snapped,,so new waterpump anyway,,i didnt do the job,,place where i bought it dd it,,i factored in in the price...also only buy from bmw the stats,,around £80 for the 2...

[nomiS330d]

Originally Posted by rasa bmw

yup ya stats are goosed,,both my cars would get to over 90 degrees with the driving you have noted,,,,my e90 330d was averaging 36 mpg when i bought it,,now aveages 44mpg,although its a manual,,my 335d averages 33-35 mpg,,

Same for me although mines manual as well.